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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
Posted to rec.crafts.metalworking
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Rubber for belt grinder drive wheel?
On Jul 18, 2:17 pm, F. George McDuffee gmcduf...@mcduffee-
associates.us wrote: On Tue, 17 Jul 2007 16:41:43 -0700, mlcorson wrote: I have an older Rockwell/Delta 1" x42" belt grinder and sander. The 1/8" rubber that was on the 3.5" diameter plastic drive wheel has rotted away leaving only the wheel. I'd like to replace it with another rubber, but I have been unable to locate a suitable replacement. A 3" diameter inner tube might work, but what kind of adhesive should I use? I have some cork and rubber gasket material that I could cut and place, but it would have a seam. The drive wheel does not come in contact with the work, so the seam may not matter. I don't want to botch up the wheel, so I need some advice. TIA -Mike St. Louis, Mo ======= From the "garage of bodge" As one poster suggested try running with the bare drive wheel. I tried this and when attempting a "heavy" grind the belt would slip. As a quick fix (about 4 years ago) I wound on a layer of black rubber "insulation tape" (not the cloth or plastic kind). Make sure to wind in the same direction that the belt will turn so as to avoid having the belt try to unwrap the tape. Overlap the tape about 1/2 the width, and you may want to build up the center to provide additional crown if you are having problems with belt tracking or the tendency to work to one side or the other off the pulley. This worked so well that I now consider this a permanent fix, and the tape is still slightly soft. Unka' George [George McDuffee] ============ Merchants have no country. The mere spot they stand on does not constitute so strong an attachment as that from which they draw their gains. Thomas Jefferson (1743-1826), U.S. president. Letter, 17 March 1814. George: I have some of this tape. I think. There is little or no adhesive on the tape...correct? I use it for wrapping a split bolt wire splices. More rubber than tape. Same stuff? |
#2
Posted to rec.crafts.metalworking
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Rubber for belt grinder drive wheel?
"mlcorson" wrote in message oups.com... I have some of this tape. I think. There is little or no adhesive on the tape...correct? I use it for wrapping a split bolt wire splices. More rubber than tape. Same stuff? It's called "self-sealing" or "self-vulcanizing" splicing tape. You should _always_ have a roll in the shop. It's great for all sorts of friction functions. LLoyd |
#3
Posted to rec.crafts.metalworking
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Rubber for belt grinder drive wheel?
On Thu, 19 Jul 2007 06:34:28 -0700, mlcorson
wrote: On Jul 18, 2:17 pm, F. George McDuffee gmcduf...@mcduffee- associates.us wrote: On Tue, 17 Jul 2007 16:41:43 -0700, mlcorson wrote: I have an older Rockwell/Delta 1" x42" belt grinder and sander. The 1/8" rubber that was on the 3.5" diameter plastic drive wheel has rotted away leaving only the wheel. I'd like to replace it with another rubber, but I have been unable to locate a suitable replacement. A 3" diameter inner tube might work, but what kind of adhesive should I use? I have some cork and rubber gasket material that I could cut and place, but it would have a seam. The drive wheel does not come in contact with the work, so the seam may not matter. I don't want to botch up the wheel, so I need some advice. TIA -Mike St. Louis, Mo ======= From the "garage of bodge" As one poster suggested try running with the bare drive wheel. I tried this and when attempting a "heavy" grind the belt would slip. As a quick fix (about 4 years ago) I wound on a layer of black rubber "insulation tape" (not the cloth or plastic kind). Make sure to wind in the same direction that the belt will turn so as to avoid having the belt try to unwrap the tape. Overlap the tape about 1/2 the width, and you may want to build up the center to provide additional crown if you are having problems with belt tracking or the tendency to work to one side or the other off the pulley. This worked so well that I now consider this a permanent fix, and the tape is still slightly soft. Unka' George [George McDuffee] ============ Merchants have no country. The mere spot they stand on does not constitute so strong an attachment as that from which they draw their gains. Thomas Jefferson (1743-1826), U.S. president. Letter, 17 March 1814. George: I have some of this tape. I think. There is little or no adhesive on the tape...correct? I use it for wrapping a split bolt wire splices. More rubber than tape. Same stuff? ============ If it sticks to itself, yes. When you get enough wrapped on the roller pull the tape apart and it will stretch and thin when it tears. This will make a flatter joint and eliminate a possible "thump" with a square cut end. Good luck and let us know how you make out. Unka' George [George McDuffee] ============ Merchants have no country. The mere spot they stand on does not constitute so strong an attachment as that from which they draw their gains. Thomas Jefferson (1743-1826), U.S. president. Letter, 17 March 1814. |
#4
Posted to rec.crafts.metalworking
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Rubber for belt grinder drive wheel?
On Thu, 19 Jul 2007 09:45:38 -0400, with neither quill nor qualm,
"Lloyd E. Sponenburgh" quickly quoth: "mlcorson" wrote in message roups.com... I have some of this tape. I think. There is little or no adhesive on the tape...correct? I use it for wrapping a split bolt wire splices. More rubber than tape. Same stuff? It's called "self-sealing" or "self-vulcanizing" splicing tape. You should _always_ have a roll in the shop. It's great for all sorts of friction functions. Are there any places which sell it for less than $19/roll? I saw a guy at the Home Improvement Faire a few months ago who was selling a couple rolls for $25. I was sure I could do better but then forgot about it. The stuff does look handy. So, who wholesales it? Oh, and what's the shelf life? --- In Christianity, neither morality nor religion comes into contact with reality at any point. --FRIEDRICH NIETZSCHE ----------------------------------------------------------------- |
#5
Posted to rec.crafts.metalworking
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Rubber for belt grinder drive wheel?
On Jul 19, 9:58 am, F. George McDuffee gmcduf...@mcduffee-
associates.us wrote: On Thu, 19 Jul 2007 06:34:28 -0700, mlcorson wrote: On Jul 18, 2:17 pm, F. George McDuffee gmcduf...@mcduffee- associates.us wrote: On Tue, 17 Jul 2007 16:41:43 -0700, mlcorson wrote: I have an older Rockwell/Delta 1" x42" belt grinder and sander. The 1/8" rubber that was on the 3.5" diameter plastic drive wheel has rotted away leaving only the wheel. I'd like to replace it with another rubber, but I have been unable to locate a suitable replacement. A 3" diameter inner tube might work, but what kind of adhesive should I use? I have some cork and rubber gasket material that I could cut and place, but it would have a seam. The drive wheel does not come in contact with the work, so the seam may not matter. I don't want to botch up the wheel, so I need some advice. TIA -Mike St. Louis, Mo ======= From the "garage of bodge" As one poster suggested try running with the bare drive wheel. I tried this and when attempting a "heavy" grind the belt would slip. As a quick fix (about 4 years ago) I wound on a layer of black rubber "insulation tape" (not the cloth or plastic kind). Make sure to wind in the same direction that the belt will turn so as to avoid having the belt try to unwrap the tape. Overlap the tape about 1/2 the width, and you may want to build up the center to provide additional crown if you are having problems with belt tracking or the tendency to work to one side or the other off the pulley. This worked so well that I now consider this a permanent fix, and the tape is still slightly soft. Unka' George [George McDuffee] ============ Merchants have no country. The mere spot they stand on does not constitute so strong an attachment as that from which they draw their gains. Thomas Jefferson (1743-1826), U.S. president. Letter, 17 March 1814. George: I have some of this tape. I think. There is little or no adhesive on the tape...correct? I use it for wrapping a split bolt wire splices. More rubber than tape. Same stuff? ============ If it sticks to itself, yes. When you get enough wrapped on the roller pull the tape apart and it will stretch and thin when it tears. This will make a flatter joint and eliminate a possible "thump" with a square cut end. Good luck and let us know how you make out. Unka' George [George McDuffee] ============ Merchants have no country. The mere spot they stand on does not constitute so strong an attachment as that from which they draw their gains. Thomas Jefferson (1743-1826), U.S. president. Letter, 17 March 1814. Well, I stripped the old rubber tire off the wheel, and ran a belt with the drive wheel naked. This seems to work. I will run it like this until the wheel wears out or slips. When and if this no longer works, I will try the rubber tape or just make a new drive wheel. Thanks everyone for your suggestions. -Mike |
#6
Posted to rec.crafts.metalworking
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Rubber for belt grinder drive wheel?
On Jul 20, 2:30 am, mlcorson wrote:
Well, I stripped the old rubber tire off the wheel, and ran a belt with the drive wheel naked. This seems to work. I will run it like this until the wheel wears out or slips. When and if this no longer works, I will try the rubber tape or just make a new drive wheel. Thanks everyone for your suggestions. -Mike I also have a Delta 42 inch belt sander. The rubber on both the drive and idle wheels came off. Keep your eyes open. I found a couple of plastic wheels of the same size in the dumpster of a auto hobby shop. I had to make a new shaft so I could use one for the idle wheel. I think they came off a auto engine and kept tension on a serpntine belt. Dan |
#8
Posted to rec.crafts.metalworking
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Rubber for belt grinder drive wheel?
On Jul 19, 8:59 pm, " wrote:
On Jul 20, 2:30 am, mlcorson wrote: Well, I stripped the old rubber tire off the wheel, and ran a belt with the drive wheel naked. This seems to work. I will run it like this until the wheel wears out or slips. When and if this no longer works, I will try the rubber tape or just make a new drive wheel. Thanks everyone for your suggestions. -Mike I also have a Delta 42 inch belt sander. The rubber on both the drive and idle wheels came off. Keep your eyes open. I found a couple of plastic wheels of the same size in the dumpster of a auto hobby shop. I had to make a new shaft so I could use one for the idle wheel. I think they came off a auto engine and kept tension on a serpntine belt. Dan Dan: I just got this Rockwell 1970's sander. It has a 3/4hp, 3420 rpm motor on it. This seems very fast to me. What size is your machine side V pulley? What rpm is your motor? I went to the Delta/Rockwell website and found the specs. They call for a 3400+ rpm motor. My machine may have the wrong size V pulley. Any information is appreciated. Thanks. _mike |
#9
Posted to rec.crafts.metalworking
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Rubber for belt grinder drive wheel?
On Jul 20, 4:39 pm, mlcorson wrote:
I just got this Rockwell 1970's sander. It has a 3/4hp, 3420 rpm motor on it. This seems very fast to me. What size is your machine side V pulley? What rpm is your motor? I went to the Delta/Rockwell website and found the specs. They call for a 3400+ rpm motor. My machine may have the wrong size V pulley. Any information is appreciated. Thanks. _mike My motor looks to be the original motor, has a Rockwell id plate on it. It is 1/2 hp 3450 rpm. The motor has a pulley that is just slightly bigger than the pulley that drives the belt. OD of the motor pulley is about 3 inches. Hope that helps. Dan |
#10
Posted to rec.crafts.metalworking
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Rubber for belt grinder drive wheel?
On Jul 20, 1:16 pm, " wrote:
On Jul 20, 4:39 pm, mlcorson wrote: I just got this Rockwell 1970's sander. It has a 3/4hp, 3420 rpm motor on it. This seems very fast to me. What size is your machine side V pulley? What rpm is your motor? I went to the Delta/Rockwell website and found the specs. They call for a 3400+ rpm motor. My machine may have the wrong size V pulley. Any information is appreciated. Thanks. _mike My motor looks to be the original motor, has a Rockwell id plate on it. It is 1/2 hp 3450 rpm. The motor has a pulley that is just slightly bigger than the pulley that drives the belt. OD of the motor pulley is about 3 inches. Hope that helps. Dan Yes, helps a lot. It matches my machine. I was going to put on a larger pulley on the machine, but now I won't. Thanks! -Mike |
#11
Posted to rec.crafts.metalworking
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Rubber for belt grinder drive wheel?
On Jul 20, 1:16 pm, " wrote:
On Jul 20, 4:39 pm, mlcorson wrote: I just got this Rockwell 1970's sander. It has a 3/4hp, 3420 rpm motor on it. This seems very fast to me. What size is your machine side V pulley? What rpm is your motor? I went to the Delta/Rockwell website and found the specs. They call for a 3400+ rpm motor. My machine may have the wrong size V pulley. Any information is appreciated. Thanks. _mike My motor looks to be the original motor, has a Rockwell id plate on it. It is 1/2 hp 3450 rpm. The motor has a pulley that is just slightly bigger than the pulley that drives the belt. OD of the motor pulley is about 3 inches. Hope that helps. Dan George and Dan: I've wrapped the drive wheel with rubber tape (thanks George). Worked great. I replaced my back idler wheel with a skate board wheel (Thanks Martin). Everything is working beautifully. However, I still would like to have some variability in the belt speed. The grinder is mounted on a vertical tube stand with the motor attached to the tube below the grinder. The following options seem practical. I have an variable speed spring loaded pulley that I removed from one of my folding machines. The spring loaded motor pulley (was on the motor) seemed to work by increasing/decreasing the tension on the belt. I'd have to engineer a tensioning device to make the pulley work in a 3rd position on the belt. Make sense? The other way is to use 2 cone pulleys, one on the motor and one on the machine. I'd "hang" the motor on a hinge and use the weight of the motor to put tension on the belt. That way the motor is simply lifted to release the belt tension, and change the pulley arrangement. Downside to any of these approaches? What about a static cone pulley in a 3rd position? How would I move the cone to align with the belt? My first observation is that there is very little room for a larger pulley on the machine side. Maybe room for a 4". Honestly, I don't know think I have the skills to construct an idler with a shaft and bearing. I'd have to find something and adapt it my use. What think? -Mike |
#12
Posted to rec.crafts.metalworking
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Rubber for belt grinder drive wheel?
replying to mlcorson, Farmer wrote:
1 1/2" schedule 40 PVC pipe for a back idler. Use a layer of gorilla tape on the bearing to fit tightly inside the pipe. I used a 1" length of pipe. -- for full context, visit https://www.polytechforum.com/metalw...eel-65400-.htm |
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