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#1
Posted to rec.woodworking
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Unisaw arbor bearing replacement
Has anyone replaced arbor bearings on a Unisaw? If so, did you do it without
removing the table top, or did you remove it first? This article makes it sound fairly simple without removing the top OR the arbor bracket, only the arbor shaft: http://www.woodcentral.com/bparticle...bearings.shtml The procedure on sawcenter.com has the top removed AND he removes the whole arbor assembly as well. My Unisaw is a model 36-844, circa 2001. I changed the belts yesterday, and while the belts were off, I could hear the sound of dry clicking bearings when I spun the blade by hand. There is no slop and they still spin freely but I figured it would be best to go ahead and change them out. I'll be replacing the originals with 2 quality Nachi bearings: http://www.amazon.com/6203-2NSE-Bear.../dp/B0045E0E8U Any input? |
#2
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Unisaw arbor bearing replacement
On Sat, 06 Apr 2013 13:40:35 +0000, Spalted Walt
wrote: Has anyone replaced arbor bearings on a Unisaw? If so, did you do it without removing the table top, or did you remove it first? This article makes it sound fairly simple without removing the top OR the arbor bracket, only the arbor shaft: http://www.woodcentral.com/bparticle...bearings.shtml The procedure on sawcenter.com has the top removed AND he removes the whole arbor assembly as well. My Unisaw is a model 36-844, circa 2001. I changed the belts yesterday, and while the belts were off, I could hear the sound of dry clicking bearings when I spun the blade by hand. There is no slop and they still spin freely but I figured it would be best to go ahead and change them out. I'll be replacing the originals with 2 quality Nachi bearings: http://www.amazon.com/6203-2NSE-Bear.../dp/B0045E0E8U Any input? Well you do need to remove the top. http://www.sawcenter.com/unisaw.htm That might help. Mark |
#3
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Unisaw arbor bearing replacement
On 4/6/2013 6:40 AM, Spalted Walt wrote:
Has anyone replaced arbor bearings on a Unisaw? If so, did you do it without removing the table top, or did you remove it first? This article makes it sound fairly simple without removing the top OR the arbor bracket, only the arbor shaft: http://www.woodcentral.com/bparticle...bearings.shtml The procedure on sawcenter.com has the top removed AND he removes the whole arbor assembly as well. My Unisaw is a model 36-844, circa 2001. I changed the belts yesterday, and while the belts were off, I could hear the sound of dry clicking bearings when I spun the blade by hand. There is no slop and they still spin freely but I figured it would be best to go ahead and change them out. I'll be replacing the originals with 2 quality Nachi bearings: http://www.amazon.com/6203-2NSE-Bear.../dp/B0045E0E8U Any input? I have noticed over the years that most repairs of this sort are more easily accomplished as a bench top job rather than trying to get at nuts, washers, springs, clips, etc. inside the casing. Or maybe I just don't have enough joints in my fingers. mahalo, jo4hn |
#4
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Unisaw arbor bearing replacement
On 4/6/2013 8:40 AM, Spalted Walt wrote:
Has anyone replaced arbor bearings on a Unisaw? If so, did you do it without removing the table top, or did you remove it first? This article makes it sound fairly simple without removing the top OR the arbor bracket, only the arbor shaft: http://www.woodcentral.com/bparticle...bearings.shtml The procedure on sawcenter.com has the top removed AND he removes the whole arbor assembly as well. My Unisaw is a model 36-844, circa 2001. I changed the belts yesterday, and while the belts were off, I could hear the sound of dry clicking bearings when I spun the blade by hand. There is no slop and they still spin freely but I figured it would be best to go ahead and change them out. I'll be replacing the originals with 2 quality Nachi bearings: http://www.amazon.com/6203-2NSE-Bear.../dp/B0045E0E8U Any input? I have never ever done this but here is something to think about. I highly suspect that after removing the arbor and replacing the bearings that the blade is not going to end up exactly where it was before the bearing replacement. If you are worried about upsetting blade alignment by removing the top you may not be making things easier by not removing the top if the alignment still has to be reset. |
#5
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Unisaw arbor bearing replacement
On 4/6/2013 8:59 AM, Markem wrote:
On Sat, 06 Apr 2013 13:40:35 +0000, Spalted Walt wrote: Has anyone replaced arbor bearings on a Unisaw? If so, did you do it without removing the table top, or did you remove it first? This article makes it sound fairly simple without removing the top OR the arbor bracket, only the arbor shaft: http://www.woodcentral.com/bparticle...bearings.shtml The procedure on sawcenter.com has the top removed AND he removes the whole arbor assembly as well. My Unisaw is a model 36-844, circa 2001. I changed the belts yesterday, and while the belts were off, I could hear the sound of dry clicking bearings when I spun the blade by hand. There is no slop and they still spin freely but I figured it would be best to go ahead and change them out. I'll be replacing the originals with 2 quality Nachi bearings: http://www.amazon.com/6203-2NSE-Bear.../dp/B0045E0E8U Any input? Well you do need to remove the top. http://www.sawcenter.com/unisaw.htm That might help. Mark Hummmm my virus protection prevented me from going there and identified a Trojan threat. |
#6
Posted to rec.woodworking
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Unisaw arbor bearing replacement
On Sat, 06 Apr 2013 09:51:50 -0500, Leon lcb11211@swbelldotnet wrote:
On 4/6/2013 8:40 AM, Spalted Walt wrote: Has anyone replaced arbor bearings on a Unisaw? If so, did you do it without removing the table top, or did you remove it first? This article makes it sound fairly simple without removing the top OR the arbor bracket, only the arbor shaft: http://www.woodcentral.com/bparticle...bearings.shtml The procedure on sawcenter.com has the top removed AND he removes the whole arbor assembly as well. My Unisaw is a model 36-844, circa 2001. I changed the belts yesterday, and while the belts were off, I could hear the sound of dry clicking bearings when I spun the blade by hand. There is no slop and they still spin freely but I figured it would be best to go ahead and change them out. I'll be replacing the originals with 2 quality Nachi bearings: http://www.amazon.com/6203-2NSE-Bear.../dp/B0045E0E8U Any input? I have never ever done this but here is something to think about. I highly suspect that after removing the arbor and replacing the bearings that the blade is not going to end up exactly where it was before the bearing replacement. If you are worried about upsetting blade alignment by removing the top you may not be making things easier by not removing the top if the alignment still has to be reset. My anitivirus (Symantec Endpoint) did the same thing - which is why I didn't post the the complete link. I don't know if the site has recently been hijacked or if it's just a false-alarm but I've been to it many times in the past few years without any problems. Also, while Googling "unisaw bearings" the woodworker forums (lumberjocks, sawmillcreek, etc) recommended that same link numerous times. The link below IS safe. It's an archive of the original sawcenter instructional: http://web.archive.org/web/201201291...com/unisaw.htm |
#7
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Unisaw arbor bearing replacement
On Sat, 06 Apr 2013 09:51:50 -0500, Leon lcb11211@swbelldotnet wrote:
On 4/6/2013 8:40 AM, Spalted Walt wrote: Has anyone replaced arbor bearings on a Unisaw? If so, did you do it without removing the table top, or did you remove it first? This article makes it sound fairly simple without removing the top OR the arbor bracket, only the arbor shaft: http://www.woodcentral.com/bparticle...bearings.shtml The procedure on sawcenter.com has the top removed AND he removes the whole arbor assembly as well. My Unisaw is a model 36-844, circa 2001. I changed the belts yesterday, and while the belts were off, I could hear the sound of dry clicking bearings when I spun the blade by hand. There is no slop and they still spin freely but I figured it would be best to go ahead and change them out. I'll be replacing the originals with 2 quality Nachi bearings: http://www.amazon.com/6203-2NSE-Bear.../dp/B0045E0E8U Any input? I have never ever done this but here is something to think about. I highly suspect that after removing the arbor and replacing the bearings that the blade is not going to end up exactly where it was before the bearing replacement. If you are worried about upsetting blade alignment by removing the top you may not be making things easier by not removing the top if the alignment still has to be reset. What I'm actually more worried about is the weight of the top (I'll be doing this solo). With the wing removed I believe I can manage it. Any idea what the weight of the top is? |
#8
Posted to rec.woodworking
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Unisaw arbor bearing replacement
On 4/6/2013 12:02 PM, Spalted Walt wrote:
On Sat, 06 Apr 2013 09:51:50 -0500, Leon lcb11211@swbelldotnet wrote: On 4/6/2013 8:40 AM, Spalted Walt wrote: Has anyone replaced arbor bearings on a Unisaw? If so, did you do it without removing the table top, or did you remove it first? This article makes it sound fairly simple without removing the top OR the arbor bracket, only the arbor shaft: http://www.woodcentral.com/bparticle...bearings.shtml The procedure on sawcenter.com has the top removed AND he removes the whole arbor assembly as well. My Unisaw is a model 36-844, circa 2001. I changed the belts yesterday, and while the belts were off, I could hear the sound of dry clicking bearings when I spun the blade by hand. There is no slop and they still spin freely but I figured it would be best to go ahead and change them out. I'll be replacing the originals with 2 quality Nachi bearings: http://www.amazon.com/6203-2NSE-Bear.../dp/B0045E0E8U Any input? I have never ever done this but here is something to think about. I highly suspect that after removing the arbor and replacing the bearings that the blade is not going to end up exactly where it was before the bearing replacement. If you are worried about upsetting blade alignment by removing the top you may not be making things easier by not removing the top if the alignment still has to be reset. What I'm actually more worried about is the weight of the top (I'll be doing this solo). With the wing removed I believe I can manage it. Any idea what the weight of the top is? It will be heavy, but that is relative. I would imagine in the 100lbs range. But if you do pull that top off there will probably be shims at each or some of the corners between the top and the cabinet. You will want to make sure that they go back in the right place. |
#9
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Unisaw arbor bearing replacement
On 4/6/2013 12:02 PM, Spalted Walt wrote:
.... What I'm actually more worried about is the weight of the top (I'll be doing this solo). With the wing removed I believe I can manage it. Any idea what the weight of the top is? About 250 or less...I don't recall exact dimensions but they're roughly 27" deep by 40" including wing iirc. Presuming extension is 10" that's 27x30 and if assume 1" thick on average that's just a little over 200 lb. or so. -- |
#10
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Unisaw arbor bearing replacement
On 4/6/2013 12:29 PM, dpb wrote:
On 4/6/2013 12:02 PM, Spalted Walt wrote: ... What I'm actually more worried about is the weight of the top (I'll be doing this solo). With the wing removed I believe I can manage it. Any idea what the weight of the top is? About 250 or less...I don't recall exact dimensions but they're roughly 27" deep by 40" including wing iirc. Presuming extension is 10" that's 27x30 and if assume 1" thick on average that's just a little over 200 lb. or so. -- I think you are way over estimating, the motor and trunion will be a majority of the weight and the top is not solid, typically it is about 1/4" thick. |
#11
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Unisaw arbor bearing replacement
On 4/6/2013 12:33 PM, Leon wrote:
On 4/6/2013 12:29 PM, dpb wrote: On 4/6/2013 12:02 PM, Spalted Walt wrote: ... What I'm actually more worried about is the weight of the top (I'll be doing this solo). With the wing removed I believe I can manage it. Any idea what the weight of the top is? About 250 or less...I don't recall exact dimensions but they're roughly 27" deep by 40" including wing iirc. Presuming extension is 10" that's 27x30 and if assume 1" thick on average that's just a little over 200 lb. or so. -- I think you are way over estimating, the motor and trunion will be a majority of the weight and the top is not solid, typically it is about 1/4" thick. A) Intended. B) Is solid, but webbed. OP can guesstimate as wishes from starting point if wants to get better estimate by estimating webbing fraction. Starting w/ a 1" thickness makes the ratioing easier. -- |
#12
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Unisaw arbor bearing replacement
On 4/6/2013 1:32 PM, dpb wrote:
On 4/6/2013 12:33 PM, Leon wrote: On 4/6/2013 12:29 PM, dpb wrote: On 4/6/2013 12:02 PM, Spalted Walt wrote: ... What I'm actually more worried about is the weight of the top (I'll be doing this solo). With the wing removed I believe I can manage it. Any idea what the weight of the top is? About 250 or less...I don't recall exact dimensions but they're roughly 27" deep by 40" including wing iirc. Presuming extension is 10" that's 27x30 and if assume 1" thick on average that's just a little over 200 lb. or so. -- I think you are way over estimating, the motor and trunion will be a majority of the weight and the top is not solid, typically it is about 1/4" thick. A) Intended. B) Is solid, but webbed. Yeah, what I meant to indicate was not solid 1" thick. |
#13
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Unisaw arbor bearing replacement
On 4/6/2013 3:17 PM, Leon wrote:
On 4/6/2013 1:32 PM, dpb wrote: On 4/6/2013 12:33 PM, Leon wrote: On 4/6/2013 12:29 PM, dpb wrote: On 4/6/2013 12:02 PM, Spalted Walt wrote: ... What I'm actually more worried about is the weight of the top (I'll be doing this solo). With the wing removed I believe I can manage it. Any idea what the weight of the top is? About 250 or less...I don't recall exact dimensions but they're roughly 27" deep by 40" including wing iirc. Presuming extension is 10" that's 27x30 and if assume 1" thick on average that's just a little over 200 lb. or so. -- I think you are way over estimating, the motor and trunion will be a majority of the weight and the top is not solid, typically it is about 1/4" thick. A) Intended. B) Is solid, but webbed. Yeah, what I meant to indicate was not solid 1" thick. Actually to be anal about it, using an iron weight calculator, a 1/4" thick by 27 x 40 would weigh about 70lbs. Add 50% more for the webbing and you are at about 105 lbs. |
#14
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Unisaw arbor bearing replacement
Subject
Not to get the cart before the horse, but to properly install the new bearings, you are going to need an arbor press. You are going to take the arbor and bearings to the arbor press, not the other way around. Lew |
#15
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Unisaw arbor bearing replacement
"Lew Hodgett" wrote in message eb.com... Subject Not to get the cart before the horse, but to properly install the new bearings, you are going to need an arbor press. You are going to take the arbor and bearings to the arbor press, not the other way around. What he said. If you are too rough on the cast iron yolk that holds the bearings, you will break the casting. DON'T ask me how I know that. Be Very careful with the amount of force you use. -- Jim in NC |
#16
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Unisaw arbor bearing replacement
On Sat, 06 Apr 2013 12:26:22 -0500, Leon lcb11211@swbelldotnet wrote:
On 4/6/2013 12:02 PM, Spalted Walt wrote: On Sat, 06 Apr 2013 09:51:50 -0500, Leon lcb11211@swbelldotnet wrote: On 4/6/2013 8:40 AM, Spalted Walt wrote: What I'm actually more worried about is the weight of the top (I'll be doing this solo). With the wing removed I believe I can manage it. Any idea what the weight of the top is? It will be heavy, but that is relative. I would imagine in the 100lbs range. But if you do pull that top off there will probably be shims at each or some of the corners between the top and the cabinet. You will want to make sure that they go back in the right place. With a bright flashlight and reading glasses I found 3 of the 4 large cap screws do indeed have shims, a couple have multiple shims. I was expecting thin metal shims but they appear to be some sort of amber phenolic material varying in thickness. |
#17
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Unisaw arbor bearing replacement
On Sat, 6 Apr 2013 13:37:55 -0700, "Lew Hodgett" wrote:
You are going to take the arbor and bearings to the arbor press, not the other way around. Lew Actually I won't. I'll be using a bearing separator/puller to remove the bearing nearest the blade and I believe I can use it to slide the new bearing home as well. I've had a set of these for about 5 yrs, used the small one once, the neighbor has used them a couple of times. They work great. http://www.youtube.com/watch?v=R25zsdW8Ewo Here's a photo of a Unisaw arbor shaft with the bearing in place: http://web.archive.org/liveweb/http:...om/arbor_2.gif Also, I WILL NOT be changing mine out in the manner this guy did either ;-) http://lumberjocks.com/Bothus/blog/11219 always nice to learn from other's mistakes... |
#18
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Unisaw arbor bearing replacement
On Sat, 06 Apr 2013 15:35:05 -0500, Leon lcb11211@swbelldotnet wrote:
On 4/6/2013 3:17 PM, Leon wrote: On 4/6/2013 1:32 PM, dpb wrote: On 4/6/2013 12:33 PM, Leon wrote: On 4/6/2013 12:29 PM, dpb wrote: On 4/6/2013 12:02 PM, Spalted Walt wrote: ... What I'm actually more worried about is the weight of the top (I'll be doing this solo). With the wing removed I believe I can manage it. Any idea what the weight of the top is? About 250 or less...I don't recall exact dimensions but they're roughly 27" deep by 40" including wing iirc. Presuming extension is 10" that's 27x30 and if assume 1" thick on average that's just a little over 200 lb. or so. -- I think you are way over estimating, the motor and trunion will be a majority of the weight and the top is not solid, typically it is about 1/4" thick. A) Intended. B) Is solid, but webbed. Yeah, what I meant to indicate was not solid 1" thick. Actually to be anal about it, using an iron weight calculator, a 1/4" thick by 27 x 40 would weigh about 70lbs. Add 50% more for the webbing and you are at about 105 lbs. 27 x 40 would be the dimension of the top w/both wings attached. I would've thought that would be closer to 200lbs or more. I Checked the thickness of my top. Took a 6" C-clamp, screw side underneath, and snugged it up on a flat area (not on webbing). Wrapped a piece of tape around where the clamp's male threads entered the female thread clamp portion. Removed clamp, screwed the thing until the the tape just hit the female portion and measured the distance between the swivel pad and the stationary thingy and got a distance of 3/8"! The top by itself (no wings attached) measures 27 x 20, it's 3/8 thick, the edge is 1 5/8 wide, the edge and webbing are roughly 5/16 thick. I'm curious to know what the weight is if you plugged those figures in your 'cast iron calculator' |
#19
Posted to rec.woodworking
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Unisaw arbor bearing replacement
"Spalted Walt" wrote:
Actually I won't. I'll be using a bearing separator/puller to remove the bearing nearest the blade and I believe I can use it to slide the new bearing home as well. ----------------------------------------------------------------- You could care less how you remove the old bearings. The bearing puller shown is basic, but it also is all that is needed to remove the old bearings. Attempting to use the tool (bearing puller) to install the new bearings is pure folly. You will probably get the new bearings installed, but you are almost guaranteed to brinnel the new bearings in the process thus rendering them useless. An arbor press exists for a reason. Lew I've had a set of these for about 5 yrs, used the small one once, the neighbor has used them a couple of times. They work great. http://www.youtube.com/watch?v=R25zsdW8Ewo Here's a photo of a Unisaw arbor shaft with the bearing in place: http://web.archive.org/liveweb/http:...om/arbor_2.gif Also, I WILL NOT be changing mine out in the manner this guy did either ;-) http://lumberjocks.com/Bothus/blog/11219 always nice to learn from other's mistakes... |
#20
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Unisaw arbor bearing replacement
On 4/7/2013 8:51 PM, Lew Hodgett wrote:
"Spalted Walt" wrote: Actually I won't. I'll be using a bearing separator/puller to remove the bearing nearest the blade and I believe I can use it to slide the new bearing home as well. ----------------------------------------------------------------- You could care less how you remove the old bearings. The bearing puller shown is basic, but it also is all that is needed to remove the old bearings. Attempting to use the tool (bearing puller) to install the new bearings is pure folly. You will probably get the new bearings installed, but you are almost guaranteed to brinnel the new bearings in the process thus rendering them useless. An arbor press exists for a reason. Lew I've had a set of these for about 5 yrs, used the small one once, the neighbor has used them a couple of times. They work great. http://www.youtube.com/watch?v=R25zsdW8Ewo Here's a photo of a Unisaw arbor shaft with the bearing in place: http://web.archive.org/liveweb/http:...om/arbor_2.gif Also, I WILL NOT be changing mine out in the manner this guy did either ;-) http://lumberjocks.com/Bothus/blog/11219 always nice to learn from other's mistakes... You could also heat up the bearings by putting them on top of a radiator and warm them up so they expand then drive them on. They sell warming machines, but you don't have to buy one just use what you have. if you can get them heated up to 140 You might be able to drive them easily. -- Jeff |
#21
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Unisaw arbor bearing replacement
Lew Hodgett wrote:
You will probably get the new bearings installed, but you are almost guaranteed to brinnel the new bearings in the process thus rendering them useless. Correct me if I am wrong, but isn't brinelling more common or more likely on roller bearings than on ball bearings? As I understand it, in order to cause brinelling, you have to exceed a rated force of the bearing against the race. This is not likely in seating ball bearings, but it is likely if improperly installing roller bearings. An arbor press exists for a reason. Agreed. -- -Mike- |
#22
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Unisaw arbor bearing replacement
On Sun, 7 Apr 2013 17:51:46 -0700, "Lew Hodgett" wrote:
You could care less how you remove the old bearings. The bearing puller shown is basic, but it also is all that is needed to remove the old bearings. Attempting to use the tool (bearing puller) to install the new bearings is pure folly. You will probably get the new bearings installed, but you are almost guaranteed to brinnel the new bearings in the process thus rendering them useless. ??? http://dictionary.reference.com/brow...nel?s=t&path=/ Perhaps if you had researched this as much as I have you would realize just how silly your reply is. No idea how old your are but perhaps with a few more orbits around the sun you'll come to the realization that there's ALWAYS more than one way to skin a cat, (or push on a bearing). An arbor press exists for a reason. Lew |
#23
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Unisaw arbor bearing replacement
"Mike Marlow" wrote: Correct me if I am wrong, but isn't brinelling more common or more likely on roller bearings than on ball bearings? As I understand it, in order to cause brinelling, you have to exceed a rated force of the bearing against the race. This is not likely in seating ball bearings, but it is likely if improperly installing roller bearings. An arbor press exists for a reason. Agreed. -------------------------------------------------------------------- It is very easy to brinnel a ball bearing if proper installation techniques are not followed. If the installation load to seat the ball bearing gets applied from the outer race, across the balls to the inner race, or vice versa, brinnelling is almost guaranteed to happen. The load rating of the ball bearing is for a bearing operating at rotating RPM and load, not the static load that happens when the bearing is improperly installed. As far as tapered roller bearings are concerned, have been in a couple of Timken plants but never got involved in a design application so can't comment on tapered roller bearings from an engineering stand point; however, the installation methods are totally different and would not be subjected to the installation brinelling experienced by ball bearings. Lew |
#24
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Unisaw arbor bearing replacement
"Lew Hodgett" wrote: You could care less how you remove the old bearings. The bearing puller shown is basic, but it also is all that is needed to remove the old bearings. Attempting to use the tool (bearing puller) to install the new bearings is pure folly. You will probably get the new bearings installed, but you are almost guaranteed to brinnel the new bearings in the process thus rendering them useless. -------------------------------------------------------- "Spalted Walt" wrote: ??? http://dictionary.reference.com/brow...nel?s=t&path=/ ----------------------------------------------------------------------- Has nothing to do with "brinelling" as applied to ball bearings. SFWIW, "brinelling" is a term unique to the ball bearing industry. ----------------------------------------------------------------------------- Perhaps if you had researched this as much as I have you would realize just how silly your reply is. No idea how old your are but perhaps with a few more orbits around the sun you'll come to the realization that there's ALWAYS more than one way to skin a cat, (or push on a bearing). --------------------------------------------------------------------- I got paid real money to design ball bearing systems back in the days when I worked in the engineering department or a rotating equipment manufacturer. What part of ball bearing design and application would you like to discuss? As far as age is concerned, I was here before the first A-bomb was dropped. What is your excuse? Lew |
#25
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Unisaw arbor bearing replacement
On Sun, 7 Apr 2013 21:07:09 -0700, "Lew Hodgett" wrote:
I got paid real money to design ball bearing systems back in the days when I worked in the engineering department or a rotating equipment manufacturer. What part of ball bearing design and application would you like to discuss? Lets discuss the part where I ASSUMED it was common knowledge that the proper way to press a bearing on a shaft was to apply pressure to the inner race ONLY. Never the seal and never the outer race. -- parts diagram posted in alt.binaries.pictures.woodworking What I failed to mention was (for the sake of brevity) is the bearing puller, when flipped over, is flat (not concave) on the back side. http://www.harborfreight.com/media/c...mage_21569.jpg I am planning to use this FLAT side of the puller to push Item #143 (steel spacer) which will be butted up against ONLY the inner race of the bearing Item #142. You obviously ASSUMED I would be removing the entire arbor assembly ("You are going to take the arbor and bearings to the arbor press") when in fact I'm probably going to remove the shaft only, for a number of reasons. |
#26
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Unisaw arbor bearing replacement
On 4/6/2013 6:40 AM, Spalted Walt wrote:
Has anyone replaced arbor bearings on a Unisaw? If so, did you do it without removing the table top, or did you remove it first? Any input? Using a "very" straight edge, make a long line on the top of the saw with the straight edge on both sides of the blade. Makes putting the top back on much easier. Removing the bearing with out removing the top is silly to even attempt. Here is a complete restoration method detailed in pictures: http://wiki.vintagemachinery.org/How...%20Unisaw.ashx for your bearing, go to: http://www.owwm.org/viewtopic.php?f=1&t=93322 and then order from: http://www.accuratebearing.com/ You need to order from Lynne using the correct numbers. |
#27
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Unisaw arbor bearing replacement
On 4/6/2013 6:40 AM, Spalted Walt wrote:
Has anyone replaced arbor bearings on a Unisaw? If so, did you do it without removing the table top, or did you remove it first? I should have mentioned that a Unisaw weight is 380 lbs trimmed out. The top is heavy and should be moved by two people for safety and common sense reasons. I would take the arbor assembly to a machine shop for bearing removal and replacement because they will have the proper tools to do it correctly. Screwing up the install will screw up both the bearing and the arbor shaft. |
#28
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Unisaw arbor bearing replacement
On Mon, 08 Apr 2013 07:51:49 -0700, Pat Barber wrote:
On 4/6/2013 6:40 AM, Spalted Walt wrote: Has anyone replaced arbor bearings on a Unisaw? If so, did you do it without removing the table top, or did you remove it first? Any input? Using a "very" straight edge, make a long line on the top of the saw with the straight edge on both sides of the blade. Makes putting the top back on much easier. Removing the bearing with out removing the top is silly to even attempt. So you're saying Jesper Gronvaldt is full of crap in his detailed description of how to do it without removing the top, http://www.woodcentral.com/bparticle...bearings.shtml along with others that have done it quite successfully? Here is a complete restoration method detailed in pictures: http://wiki.vintagemachinery.org/How...%20Unisaw.ashx A complete restoration is not needed on my Unisaw. It looks and runs as if it were manufactured a year ago (although it's 12 yrs old) and has relatively few hours on it. I merely noticed the distinct sound of dry clicking bearings while spinning the blade with the belts removed. From what I've read Delta is notorious for using low quality Chinese bearings and charging $25 bucks for the same poor quality replacements. for your bearing, go to: http://www.owwm.org/viewtopic.php?f=1&t=93322 and then order from: http://www.accuratebearing.com/ You need to order from Lynne using the correct numbers. Sorry, Lynne lost a sale. I expect them to arrive today or tomorrow, USPS priority mail. Oh, and the correct number/size is 6203. At $5.55 a piece with free shipping, I doubt Lynne could have beat the price on 6203-2NSE Nachi bearings anyway. |
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Unisaw arbor bearing replacement
On 4/8/2013 9:05 AM, Spalted Walt wrote:
So you're saying Jesper Gronvaldt is full of crap in his detailed description of how to do it without removing the top, Yes I do... I have completely restored two Delta saws from the ground up and I am very familiar with the process. I did a 34-450 Unisaw(1971) and a (1966) 34-350 12/14" Tilting Arbor Saw. Sorry, Lynne lost a sale. I expect them to arrive today or tomorrow, USPS priority mail. Oh, and the correct number/size is 6203. At $5.55 a piece with free shipping, I doubt Lynne could have beat the price on 6203-2NSE Nachi bearings anyway. Sounds like a great deal... Do you think the bearing that came in the saw cost $5.55 each when the saw was built ? Didn't you wonder why the folks at the Saw Center did it that way ? Hint: They do it for a living. |
#30
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Unisaw arbor bearing replacement
"Spalted Walt" wrote: Lets discuss the part where I ASSUMED it was common knowledge that the proper way to press a bearing on a shaft was to apply pressure to the inner race ONLY. Never the seal and never the outer race. ------------------------------------------------------- That gets half the job done. BTW, most folks know what ASSUMED gets you, perhaps you have forgotton. STFWIW, there are more 6203 bearings made than all the other ball bearings combined. Your renewal parts price is about right, Probably could have walked into any bearing supply house and bought a couple across the counter and saved the freight. Lew |
#31
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Unisaw arbor bearing replacement
On Mon, 08 Apr 2013 11:01:05 -0700, Pat Barber wrote:
On 4/8/2013 9:05 AM, Spalted Walt wrote: So you're saying Jesper Gronvaldt is full of crap in his detailed description of how to do it without removing the top, Yes I do... I have completely restored two Delta saws from the ground up and I am very familiar with the process. Sorry, but I trust Steve Shanesy's judgement (of Popular Woodworking) on this more than yours. Do yourself a favor and watch this informative Delta sponsored video of how the 'Pros' replace arbor bearings at Popular Woodworking and then get back to me on the importance of "taking the arbor assembly to a machine shop for bearing removal and replacement because they will have the proper tools to do it correctly." http://www.popularwoodworking.com/vi...ration_part_ii You can skip ahead to about the 4 minute mark if you're pressed for time. Yes, he has the top removed, because he's doing a COMPLETE restoration on a vintage 1944 Uni. Pay particular attention to the way he drives the shaft out of the arbor bracket and puts the new bearing on. I did a 34-450 Unisaw(1971) and a (1966) 34-350 12/14" Tilting Arbor Saw. Sorry, Lynne lost a sale. I expect them to arrive today or tomorrow, USPS priority mail. Oh, and the correct number/size is 6203. At $5.55 a piece with free shipping, I doubt Lynne could have beat the price on 6203-2NSE Nachi bearings anyway. Sounds like a great deal... Do you think the bearing that came in the saw cost $5.55 each when the saw was built ? Are you serious? I'd guess Delta paid closer to $.75 ea buying in bulk from their Chinese bearing importer. |
#32
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Unisaw arbor bearing replacement
So you're saying Jesper Gronvaldt is full of crap in his detailed description of how to do it without removing the top, ---------------------------------------------------- Pat Barber wrote: Yes I do... I have completely restored two Delta saws from the ground up and I am very familiar with the process. ------------------------------------------------------- "Spalted Walt" wrote: Sorry, but I trust Steve Shanesy's judgement (of Popular Woodworking) on this more than yours. ------------------------------------------------ Buy them books, they eat the covers. Good luck. Lew |
#33
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Unisaw arbor bearing replacement
On Mon, 8 Apr 2013 11:18:20 -0700, "Lew Hodgett" wrote:
Probably could have walked into any bearing supply house and bought a couple across the counter and saved the freight. Lew Shipping was free and they arrived today! http://www.ebay.com/itm/6203-2NSE-Na...-/130572904784 |
#34
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Unisaw arbor bearing replacement
On Mon, 8 Apr 2013 12:42:59 -0700, "Lew Hodgett" wrote:
Good luck. Lew Thanx |
#35
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Unisaw arbor bearing replacement
On Sat, 06 Apr 2013 09:53:00 -0500, Leon lcb11211@swbelldotnet
wrote: On 4/6/2013 8:59 AM, Markem wrote: On Sat, 06 Apr 2013 13:40:35 +0000, Spalted Walt wrote: Has anyone replaced arbor bearings on a Unisaw? If so, did you do it without removing the table top, or did you remove it first? This article makes it sound fairly simple without removing the top OR the arbor bracket, only the arbor shaft: http://www.woodcentral.com/bparticle...bearings.shtml The procedure on sawcenter.com has the top removed AND he removes the whole arbor assembly as well. My Unisaw is a model 36-844, circa 2001. I changed the belts yesterday, and while the belts were off, I could hear the sound of dry clicking bearings when I spun the blade by hand. There is no slop and they still spin freely but I figured it would be best to go ahead and change them out. I'll be replacing the originals with 2 quality Nachi bearings: http://www.amazon.com/6203-2NSE-Bear.../dp/B0045E0E8U Any input? Well you do need to remove the top. http://www.sawcenter.com/unisaw.htm That might help. Hummmm my virus protection prevented me from going there and identified a Trojan threat. What anti virus are you using? Vipre says tis ok. Mark |
#36
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Unisaw arbor bearing replacement
On 4/9/2013 6:55 AM, Markem wrote:
On Sat, 06 Apr 2013 09:53:00 -0500, Leon lcb11211@swbelldotnet wrote: On 4/6/2013 8:59 AM, Markem wrote: On Sat, 06 Apr 2013 13:40:35 +0000, Spalted Walt wrote: Has anyone replaced arbor bearings on a Unisaw? If so, did you do it without removing the table top, or did you remove it first? This article makes it sound fairly simple without removing the top OR the arbor bracket, only the arbor shaft: http://www.woodcentral.com/bparticle...bearings.shtml The procedure on sawcenter.com has the top removed AND he removes the whole arbor assembly as well. My Unisaw is a model 36-844, circa 2001. I changed the belts yesterday, and while the belts were off, I could hear the sound of dry clicking bearings when I spun the blade by hand. There is no slop and they still spin freely but I figured it would be best to go ahead and change them out. I'll be replacing the originals with 2 quality Nachi bearings: http://www.amazon.com/6203-2NSE-Bear.../dp/B0045E0E8U Any input? Well you do need to remove the top. http://www.sawcenter.com/unisaw.htm That might help. Hummmm my virus protection prevented me from going there and identified a Trojan threat. What anti virus are you using? Vipre says tis ok. Mark ESET NOD32 and apparently Norton caught it too. Mine submitted the threat to the software guys. |
#37
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Unisaw arbor bearing replacement
On Tue, 09 Apr 2013 08:21:15 -0500, Leon lcb11211@swbelldotnet
wrote: On 4/9/2013 6:55 AM, Markem wrote: What anti virus are you using? Vipre says tis ok. Mark ESET NOD32 and apparently Norton caught it too. Mine submitted the threat to the software guys. Honestly I do not trust Norton at all, had it seemed to miss virus' and identify harmless java scripts for an email address as a problem. Symantec is run by bankers that adds to distrust and dislike of the company. But that said the NPE program from Norton has fix two really bad problems I had in the past. Hopefully if Saw Center has a problem the ESET people will let them know. Mark |
#38
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Unisaw arbor bearing replacement
On 4/9/2013 2:49 PM, Markem wrote:
On Tue, 09 Apr 2013 08:21:15 -0500, Leon lcb11211@swbelldotnet wrote: On 4/9/2013 6:55 AM, Markem wrote: What anti virus are you using? Vipre says tis ok. Mark ESET NOD32 and apparently Norton caught it too. Mine submitted the threat to the software guys. Honestly I do not trust Norton at all, had it seemed to miss virus' and identify harmless java scripts for an email address as a problem. Symantec is run by bankers that adds to distrust and dislike of the company. I trusted Norton but got tired of it taking control and eating up resources and then uninstalling some versions was a nightmare. I had a neighbor that is in the business build my current computer and he puts ESET on all of them. I will say that talking to them, ESET was an easy task totally unlike Norton. But that said the NPE program from Norton has fix two really bad problems I had in the past. Hopefully if Saw Center has a problem the ESET people will let them know. Mark |
#39
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Unisaw arbor bearing replacement
In article ,
Markem wrote: What anti virus are you using? Vipre says tis ok. Let me be the first linux user to say, "Gee, I'm glad I don't have to worry about that." -- There is always an easy solution to every human problem -- neat, plausible, and wrong." (H L Mencken) Larry W. - Baltimore Maryland - lwasserm(a)sdf. lonestar. org |
#40
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Unisaw arbor bearing replacement
On Tue, 09 Apr 2013 15:32:23 -0500, Leon lcb11211@swbelldotnet
I trusted Norton but got tired of it taking control and eating up resources and then uninstalling some versions was a nightmare. Completely agree. Tried it for several weeks and then dumped it. Like you, I got tired of it taking over my system. I'm now using Zone Alarm and am very satisfied with it. |
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