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#1
Posted to rec.woodworking
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Bike wheel for a bandsaw..
Hi,
I'm repairing a two wheel bandsaw and need a top wheel for it. OEM spares are very expensive (£100+, ~$200) so I was wondering if a 12" bicycle wheel could be used? It only needs to take the pressure of the blade and spin round when required, after all. I can easily rig up a surface for the blade to ride on. It's a small bandsaw and I only really use 1/4" blades so I don't need the mega-tension on it you'd need for a 3/4" resaw blade. Any thoughts? experience? |
#2
Posted to rec.woodworking
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Bike wheel for a bandsaw..
PCPaul wrote:
Hi, I'm repairing a two wheel bandsaw and need a top wheel for it. OEM spares are very expensive (£100+, ~$200) so I was wondering if a 12" bicycle wheel could be used? It only needs to take the pressure of the blade and spin round when required, after all. I can easily rig up a surface for the blade to ride on. It's a small bandsaw and I only really use 1/4" blades so I don't need the mega-tension on it you'd need for a 3/4" resaw blade. Any thoughts? experience? I can think of a number of objections on the basis of theory, but not having tried this and being too lazy to do the calculations, I don't know if they have any validity. If the bicycle wheel is paid for and fits the shaft, I'd say try it, from a distance. If it holds together let us know how it worked out. I wouldn't go out and buy a bicycle wheel though. -- -- --John to email, dial "usenet" and validate (was jclarke at eye bee em dot net) |
#3
Posted to rec.woodworking
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Bike wheel for a bandsaw..
"PCPaul" wrote in message om... Hi, I'm repairing a two wheel bandsaw and need a top wheel for it. OEM spares are very expensive (£100+, ~$200) so I was wondering if a 12" bicycle wheel could be used? It only needs to take the pressure of the blade and spin round when required, after all. I can easily rig up a surface for the blade to ride on. It's a small bandsaw and I only really use 1/4" blades so I don't need the mega-tension on it you'd need for a 3/4" resaw blade. Any thoughts? experience? I'm betting that if the bicycle wheel was substantial enough that you would see more similar type wheels being used. Because of the constant side load tension I'm betting that spoke tension will be a nightmare and ever changing. I seriously doubt that the bearings are up to the task either. |
#4
Posted to rec.woodworking
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Bike wheel for a bandsaw..
On Jul 14, 5:35*am, PCPaul wrote:
Hi, I'm repairing a two wheel bandsaw and need a top wheel for it. OEM spares are very expensive (£100+, ~$200) so I was wondering if a 12" bicycle wheel could be used? It only needs to take the pressure of the blade and spin round when required, after all. I can easily rig up a surface for the blade to ride on. It's a small bandsaw and I only really use 1/4" blades so I don't need the mega-tension on it you'd need for a 3/4" resaw blade. Any thoughts? experience? No experience, but my thought is that the reason they went from iron wheels to aluminum was price, not because less mass is better. More mass in the wheels means better cutting for thicker stuff. And I know that bike wheels depend on the inflated tire for a great deal of their cohesiveness. After riding for a half mile on a flat tire, I can attest to that. :-) If you could somehow add a few pounds to the bike wheel it might help but otherwise, assuming it didn't fly apart as soon as it got going, it would bog down in half-inch stock. Reminds me of a Don Weber article in a back issue of PopWood, that used a bike ratchet, chain, and a spring to make a simple treadle-type late for third world woodworkers. Good article. But while they used parts from old bikes, they didn't use wheels. I'd look for old flywheels off of junk farm equipment before I'd think of bike wheels. |
#5
Posted to rec.woodworking
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Bike wheel for a bandsaw..
On Mon, 14 Jul 2008 07:55:30 -0400, J. Clarke wrote:
PCPaul wrote: Hi, I'm repairing a two wheel bandsaw and need a top wheel for it. OEM spares are very expensive (£100+, ~$200) so I was wondering if a 12" bicycle wheel could be used? It only needs to take the pressure of the blade and spin round when required, after all. I can easily rig up a surface for the blade to ride on. It's a small bandsaw and I only really use 1/4" blades so I don't need the mega-tension on it you'd need for a 3/4" resaw blade. Any thoughts? experience? I can think of a number of objections on the basis of theory, but not having tried this and being too lazy to do the calculations, I don't know if they have any validity. If the bicycle wheel is paid for and fits the shaft, I'd say try it, from a distance. If it holds together let us know how it worked out. I wouldn't go out and buy a bicycle wheel though. Good answer ;-) I'd obviously much prefer to use the real thing, but paying £100+ for an alloy wheel - no tyre, no bearing, no axle! strikes me as ridiculous. If I find a suitable wheel, I'll report back. I have other irons in the fire too, so hopefully it may not be needed... |
#6
Posted to rec.woodworking
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Bike wheel for a bandsaw..
PCPaul wrote:
.... Good answer ;-) I'd obviously much prefer to use the real thing, but paying £100+ for an alloy wheel - no tyre, no bearing, no axle! strikes me as ridiculous. .... As another poster noted, the bicycle wheel relies on the (inflated) tire for much of it's integrity under load. I think the only way you could make it work would be to have a tensioned banding around the rim to serve the purpose--if you could arrange that w/ sufficient stiffness and tension, you might have a chance. In essence you would need a 12" hose clamp of the right width w/ the tightening mechanism flush w/ the outer edge...ottomh, I'm not sure how one would arrange that easily... -- |
#7
Posted to rec.woodworking
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Bike wheel for a bandsaw..
On Jul 14, 10:30*am, " wrote:
On Jul 14, 5:35*am, PCPaul wrote: Hi, I'm repairing a two wheel bandsaw and need a top wheel for it. OEM spares are very expensive (£100+, ~$200) so I was wondering if a 12" bicycle wheel could be used? It only needs to take the pressure of the blade and spin round when required, after all. I can easily rig up a surface for the blade to ride on. It's a small bandsaw and I only really use 1/4" blades so I don't need the mega-tension on it you'd need for a 3/4" resaw blade. Any thoughts? experience? No experience, but my thought is that the reason they went from iron wheels to aluminum was price, not because less mass is better. More mass in the wheels means better cutting for thicker stuff. And I know that bike wheels depend on the inflated tire for a great deal of their cohesiveness. After riding for a half mile on a flat tire, I can attest to that. :-) If you could somehow add a few pounds to the bike wheel it might help but otherwise, assuming it didn't fly apart as soon as it got going, it would bog down in half-inch stock. Reminds me of a Don Weber article in a back issue of PopWood, that used a bike ratchet, chain, and a spring to make a simple treadle-type late for third world woodworkers. Good article. But while they used parts from old bikes, they didn't use wheels. I'd look for old flywheels off of junk farm equipment before I'd think of bike wheels. An old flywheel off a small block GM could work. A chisel and a firm blow to the ring gear and it will come off (Safety goggles etc). I made a set of free-weights for myself out of those. I also think that bicycle wheels are a lot tougher than meets the eye. I think the width at the hub might cause you grief. Also, a 12-inch wheel isn't exactly designed to handle big weights...unless little 4 -year-old Bubba weighs in at 150 pounds, which with today's diets could be a design parameter. |
#8
Posted to rec.woodworking
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Bike wheel for a bandsaw..
On Mon, 14 Jul 2008 08:29:18 -0700, Robatoy wrote:
An old flywheel off a small block GM could work. A chisel and a firm blow to the ring gear and it will come off (Safety goggles etc). I made a set of free-weights for myself out of those. I also think that bicycle wheels are a lot tougher than meets the eye. I think the width at the hub might cause you grief. Also, a 12-inch wheel isn't exactly designed to handle big weights...unless little 4 -year-old Bubba weighs in at 150 pounds, which with today's diets could be a design parameter. That's true enough.. I know when my kids were small I could ride their bike without the wheels folding up, and I'm around 200lbs. I think the smaller wheels are actually tougher than the larger sizes. Small block GMs aren't so common this side of the Atlantic (I'm in the UK) but I see what you're getting at. It's arranging the axle that gets tricky then, without a decent metalworking lathe. I might try adding a few layers of parcel strapping for tension - that can be made *very* tight, although possibly not smooth enough. A cast iron pulley would probably be the best choice but with the price of metal going up like it has done most of the scrapyards round here have been shipped lock, stock and barrel to the Far East :-( |
#9
Posted to rec.woodworking
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Bike wheel for a bandsaw..
On Mon, 14 Jul 2008 10:35:51 GMT, PCPaul wrote:
Hi, I'm repairing a two wheel bandsaw and need a top wheel for it. OEM spares are very expensive (£100+, ~$200) so I was wondering if a 12" bicycle wheel could be used? It only needs to take the pressure of the blade and spin round when required, after all. I can easily rig up a surface for the blade to ride on. It's a small bandsaw and I only really use 1/4" blades so I don't need the mega-tension on it you'd need for a 3/4" resaw blade. Any thoughts? experience? No experience, but sort of a thought... BE FRIGGIN' CAREFUL!! Yes, it might work... You might also use a strip of rags for a belt and weld old hack saw blades together for the blade.. Will it be safe? Will you be able to adjust blade tension and tracking correctly? Will the bike wheel fit inside the case and offer some protection, or does it not have a cover? I have no idea what the pound/USD conversion rate is, but I'm guessing that 100 to 200 is a lot of cash? In the US, you can buy a new 14" bandsaw for a bit over $300... How does that convert to pounds? In some cases with tools, a new one can cost less than a few parts.. mac Please remove splinters before emailing |
#10
Posted to rec.woodworking
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Bike wheel for a bandsaw..
On Jul 14, 12:08*pm, PCPaul wrote:
On Mon, 14 Jul 2008 08:29:18 -0700, Robatoy wrote: An old flywheel off a small block GM could work. A chisel and a firm blow to the ring gear and it will come off (Safety goggles etc). I made a set of free-weights for myself out of those. I also think that bicycle wheels are a lot tougher than meets the eye. I think the width at the hub might cause you grief. Also, a 12-inch wheel isn't exactly designed to handle big weights...unless little 4 -year-old Bubba weighs in at 150 pounds, which with today's diets could be a design parameter. That's true enough.. I know when my kids were small I could ride their bike without the wheels folding up, and I'm around 200lbs. I think the smaller wheels are actually tougher than the larger sizes. Just came to me... one thing that makes a bicycle wheel tough, is the fact that the shaft is supported on both sides. In a band-saw, the shaft is held by one end only. That can be compensated by a bigger diameter shaft, but in a bicycle wheel, the hub diameter is limited. (One of my ex's cheesecakes would make a nice wheel... but then we're back to a metal lathing again...) |
#11
Posted to rec.woodworking
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Bike wheel for a bandsaw..
mac pointed out that there's more to a bandsaw - that won't try
and maim or kill you - than two wheels and a bandsaw blade. I believe the phrase Penny Wise, Pound Foolish came from your side of The Pond. Unless you have plenty of spare time and are sure you can get Express Service at the nearest emergency room, I suggest you pass on trying the Jerry Rig a bike wheel. Perhaps a ply or MDF wheel? charlie b |
#12
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Bike wheel for a bandsaw..
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#13
Posted to rec.woodworking
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Bike wheel for a bandsaw..
On Jul 14, 6:35*am, PCPaul wrote:
Hi, I'm repairing a two wheel bandsaw and need a top wheel for it. OEM spares are very expensive (£100+, ~$200) so I was wondering if a 12" bicycle wheel could be used? It only needs to take the pressure of the blade and spin round when required, after all. I can easily rig up a surface for the blade to ride on. It's a small bandsaw and I only really use 1/4" blades so I don't need the mega-tension on it you'd need for a 3/4" resaw blade. Any thoughts? experience? A rule of thumb, here in the colonies, is when a repair costs half or more of replacement cost, its time to purchase a new tool. Joe G |
#14
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Bike wheel for a bandsaw..
On Mon, 14 Jul 2008 09:52:06 -0700, charlieb wrote:
mac pointed out that there's more to a bandsaw - that won't try and maim or kill you - than two wheels and a bandsaw blade. I believe the phrase Penny Wise, Pound Foolish came from your side of The Pond. Unless you have plenty of spare time and are sure you can get Express Service at the nearest emergency room, I suggest you pass on trying the Jerry Rig a bike wheel. Perhaps a ply or MDF wheel? Ply or something is also on the cards. And I currently have feelers out to get an alloy disc turned to the right size thanks to a friend at a small engineering company but he has to wait for the right sized 'scrap' to be available ;-) The bike wheel idea is looking a bit dodgy though, not due to the pressure but due to the hub/bearings, as has been mentioned. It's a nice bandsaw - an Elu with an induction motor, decent fence etc.. the only new saws in my price range would be cheap chinese stuff. Oh, and the Elu was free. |
#15
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Bike wheel for a bandsaw..
On Mon, 14 Jul 2008 10:08:31 -0700 (PDT), GROVER
wrote: On Jul 14, 6:35Â*am, PCPaul wrote: Hi, I'm repairing a two wheel bandsaw and need a top wheel for it. OEM spares are very expensive (£100+, ~$200) so I was wondering if a 12" bicycle wheel could be used? It only needs to take the pressure of the blade and spin round when required, after all. I can easily rig up a surface for the blade to ride on. It's a small bandsaw and I only really use 1/4" blades so I don't need the mega-tension on it you'd need for a 3/4" resaw blade. Any thoughts? experience? A rule of thumb, here in the colonies, is when a repair costs half or more of replacement cost, its time to purchase a new tool. Joe G Unless said replacement tool is a Chineses "kit tool" that you are going to have to take apart amd modify extensively to make it accurate and reliable. If I can fix a quality NorthAmerican or western european tool for less than 90% of the cost of a peice of Chuinese crap, I'll fix it. ** Posted from http://www.teranews.com ** |
#16
Posted to rec.woodworking
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Bike wheel for a bandsaw..
On Jul 14, 4:26*pm, clare at snyder dot ontario dot canada wrote:
On Mon, 14 Jul 2008 10:08:31 -0700 (PDT), GROVER wrote: On Jul 14, 6:35*am, PCPaul wrote: Hi, I'm repairing a two wheel bandsaw and need a top wheel for it. OEM spares are very expensive (£100+, ~$200) so I was wondering if a 12" bicycle wheel could be used? It only needs to take the pressure of the blade and spin round when required, after all. I can easily rig up a surface for the blade to ride on. It's a small bandsaw and I only really use 1/4" blades so I don't need the mega-tension on it you'd need for a 3/4" resaw blade. Any thoughts? experience? A rule of thumb, here in the colonies, is when a repair costs half or more of replacement cost, its time to purchase a new tool. Joe G *Unless said replacement tool is a Chineses "kit tool" that you are going to have to take apart amd modify extensively to make it accurate and reliable. If I can fix a quality NorthAmerican or western european tool for less than 90% of the cost of a peice of Chuinese crap, I'll fix it. Exactly my sentiments.This is starting to sound like: "Oh nooo, I need a wristband for my Rolex!! Can I use rope??" Just kidding PCPaul. |
#17
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Bike wheel for a bandsaw..
PCPaul wrote in
om: Hi, I'm repairing a two wheel bandsaw and need a top wheel for it. What's wrong with the original wheel? Is there no way it could be bodged up into working again? The bicycle wheel idea sounds interesting if you have the time to play with it, and you're not expecting too much. I'd love to hear how it turns out. I've been wanting to build my own bandsay and this might be good way to come up with some of the required parts. -- sm@ug dot ichorfang at gmail dot com |
#18
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Bike wheel for a bandsaw..
On Mon, 14 Jul 2008 21:08:32 +0000, Smaug Ichorfang wrote:
PCPaul wrote in om: Hi, I'm repairing a two wheel bandsaw and need a top wheel for it. What's wrong with the original wheel? Is there no way it could be bodged up into working again? The bicycle wheel idea sounds interesting if you have the time to play with it, and you're not expecting too much. I'd love to hear how it turns out. I've been wanting to build my own bandsay and this might be good way to come up with some of the required parts. The original wheel was plastic and had a crack through the centre. The bandsaw was used with it like that until it got so worn the blade wouldn't track (not by me). So the whole centre of the wheel (where the bearings were a press fit) is effectively gone. |
#19
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Bike wheel for a bandsaw..
PCPaul wrote:
Hi, I'm repairing a two wheel bandsaw and need a top wheel for it. OEM spares are very expensive (£100+, ~$200) so I was wondering if a 12" bicycle wheel could be used? It only needs to take the pressure of the blade and spin round when required, after all. I can easily rig up a surface for the blade to ride on. It's a small bandsaw and I only really use 1/4" blades so I don't need the mega-tension on it you'd need for a 3/4" resaw blade. Any thoughts? experience? No experience but I'd make one out of plywood before rigging up a bicycle wheel. -- Jack http://jbstein.com |
#20
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Bike wheel for a bandsaw..
On Tue, 15 Jul 2008 09:10:32 -0400, Jack Stein
wrote: PCPaul wrote: Hi, I'm repairing a two wheel bandsaw and need a top wheel for it. OEM spares are very expensive (£100+, ~$200) so I was wondering if a 12" bicycle wheel could be used? It only needs to take the pressure of the blade and spin round when required, after all. I can easily rig up a surface for the blade to ride on. It's a small bandsaw and I only really use 1/4" blades so I don't need the mega-tension on it you'd need for a 3/4" resaw blade. Any thoughts? experience? No experience but I'd make one out of plywood before rigging up a bicycle wheel. I'd make it from baltic birch ply - or in a pinch from MDF, and put a coat of West Epoxy on to seal it against moisture etc. ** Posted from http://www.teranews.com ** |
#21
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Bike wheel for a bandsaw..
On Mon, 14 Jul 2008 10:35:51 GMT, PCPaul wrote:
Hi, .. I can easily rig up a surface for the blade to ride on. Any thoughts? experience? Deleted the portions that I'llnot comment on. The consistent tracking of a blade relies on a crowned surface. You can do this? Frank |
#22
Posted to rec.woodworking
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Bike wheel for a bandsaw..
I think you are courting disaster if you try to Rube Goldberg this tool.
If you can't afford to get the real and correct part, then you obviously can't afford to own and use the tool. You should just sell it and go watch TV. Frank Boettcher wrote: On Mon, 14 Jul 2008 10:35:51 GMT, PCPaul wrote: Hi, . I can easily rig up a surface for the blade to ride on. Any thoughts? experience? Deleted the portions that I'llnot comment on. The consistent tracking of a blade relies on a crowned surface. You can do this? Frank |
#23
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Bike wheel for a bandsaw..
On Wed, 16 Jul 2008 06:55:05 -0500, mapdude wrote:
I think you are courting disaster if you try to Rube Goldberg this tool. If you can't afford to get the real and correct part, then you obviously can't afford to own and use the tool. You should just sell it and go watch TV. Thank you for your input. |
#24
Posted to rec.woodworking
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Bike wheel for a bandsaw..
On Wed, 16 Jul 2008 06:34:20 -0500, Frank Boettcher wrote:
On Mon, 14 Jul 2008 10:35:51 GMT, PCPaul wrote: I can easily rig up a surface for the blade to ride on. The consistent tracking of a blade relies on a crowned surface. You can do this? To be honest, I don't know. *But*.. what I was planning to do was use two- part epoxy to fill the rim in and to overflowing, then sand it to either flat with a tyre on or crowned if it's soft enough to cope with the teeth. TBH making a plywood wheel is looking easier, especially since I still have the useable axle and bearings from the original wheel. |
#26
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Bike wheel for a bandsaw..
On Wed, 16 Jul 2008 16:41:33 GMT, PCPaul wrote:
On Wed, 16 Jul 2008 06:34:20 -0500, Frank Boettcher wrote: On Mon, 14 Jul 2008 10:35:51 GMT, PCPaul wrote: I can easily rig up a surface for the blade to ride on. The consistent tracking of a blade relies on a crowned surface. You can do this? To be honest, I don't know. *But*.. what I was planning to do was use two- part epoxy to fill the rim in and to overflowing, then sand it to either flat with a tyre on or crowned if it's soft enough to cope with the teeth. TBH making a plywood wheel is looking easier, especially since I still have the useable axle and bearings from the original wheel. The crown is important. The blade tracks to the usable portion of each wheel primarily by trying to climb the crown to the apex but being just on the edge of being able to do so. Without the crown the blade just keeps going in the direction it is heading, off the edge of the wheel. Frank |
#27
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Bike wheel for a bandsaw..
In article ,
Frank Boettcher wrote: The crown is important. The blade tracks to the usable portion of each wheel primarily by trying to climb the crown to the apex but being just on the edge of being able to do so. Without the crown the blade just keeps going in the direction it is heading, off the edge of the wheel. Actually, the blade does climb to the apex. And whenever the blade is pushed off the apex, the crown causes the blade to tilt slightly and climb right back to the apex. |
#28
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Bike wheel for a bandsaw..
Frank Boettcher wrote:
The consistent tracking of a blade relies on a crowned surface. You can do this? Didn't Inca bandsaws have flat wheels? IIRC they recommended running with the teeth hanging off the edge. Chris |
#29
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Bike wheel for a bandsaw..
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#30
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Bike wheel for a bandsaw..
On Wed, 16 Jul 2008 14:41:11 -0600, Chris Friesen
wrote: Frank Boettcher wrote: The consistent tracking of a blade relies on a crowned surface. You can do this? Didn't Inca bandsaws have flat wheels? IIRC they recommended running with the teeth hanging off the edge. Chris I don't know. Frank |
#31
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Bike wheel for a bandsaw..
Subject
The Good news: It would be a rather straight forward procedure to construct a wheel using a plywood core, fiberglass side walls and tread along with the reuse of the existing spindle. The Bad news: It is a VERY time consuming task. Bottom Line.................................... I know how to do it but wouldn't. Led |
#32
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Bike wheel for a bandsaw..
On Jul 16, 4:41*pm, Chris Friesen wrote:
Frank Boettcher wrote: The consistent tracking of a blade relies on a crowned surface. *You can do this? Didn't Inca bandsaws have flat wheels? *IIRC they recommended running with the teeth hanging off the edge. Chris That is correct. Inca didn't think like other people on anything. I quite liked their reasoning on a lot of issues (tilting table on a TS for instance is kinda nice for small furniture parts). T |
#33
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Bike wheel for a bandsaw..
On Wed, 16 Jul 2008 06:55:05 -0500, mapdude
wrote: I think you are courting disaster if you try to Rube Goldberg this tool. If you can't afford to get the real and correct part, then you obviously can't afford to own and use the tool. You should just sell it and go watch TV. Frank Boettcher wrote: On Mon, 14 Jul 2008 10:35:51 GMT, PCPaul wrote: Hi, . I can easily rig up a surface for the blade to ride on. Any thoughts? experience? Deleted the portions that I'llnot comment on. The consistent tracking of a blade relies on a crowned surface. You can do this? Frank If it had a plastic wheel to start with, any good handiman should be able to produce something AS good as the original - and as safe. ** Posted from http://www.teranews.com ** |
#34
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Bike wheel for a bandsaw..
On Jul 14, 6:35 am, PCPaul wrote:
Hi, I'm repairing a two wheel bandsaw and need a top wheel for it. OEM spares are very expensive (£100+, ~$200) so I was wondering if a 12" bicycle wheel could be used? It only needs to take the pressure of the blade and spin round when required, after all. I can easily rig up a surface for the blade to ride on. It's a small bandsaw and I only really use 1/4" blades so I don't need the mega-tension on it you'd need for a 3/4" resaw blade. Any thoughts? experience? I've seen plywood used. Laminate 2 pieces of 3/4" and install the hub. Cut out the wheel with a router on a trammel arm. True to the last hair of a thousandth of an inch with a scraper or file held against the wheel while turning it (by hand) after installing the wheel in the frame. Glue on a tire, and she's ready to go. Balanced wheels turn smoother. Install nuts and bolts where needed to add weight and reinforce the lamination. |
#35
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Bike wheel for a bandsaw..
Lew Hodgett wrote:
Subject The Good news: It would be a rather straight forward procedure to construct a wheel using a plywood core, fiberglass side walls and tread along with the reuse of the existing spindle. Out of curiosity, why do you need fiberglass side walls? I know people make high speed dust collector fans out of plywood, I would think a slow speed band saw wheel would hold up just fine, probably a lot better than the plastic wheels he currently has? The Bad news: It is a VERY time consuming task. Bottom Line.................................... I know how to do it but wouldn't. I often thought of building one of those plywood band saws but since I already have a good band saw, I probably won't. I'd like to have a giant resaw band saw, dedicated to resawing, but... -- Jack http://jbstein.com |
#36
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Bike wheel for a bandsaw..
On Thu, 17 Jul 2008 08:20:12 -0400, Jack Stein wrote:
snip I often thought of building one of those plywood band saws but since I already have a good band saw, I probably won't. I'd like to have a giant resaw band saw, dedicated to resawing, but... Yep.. my thought, also.. I decided that if I ever did that much resawing, it would be fun to build a horizontal BS like a metal cutting one... Sort of like a big-assed chop saw but with a BS blade and wheels.. The priority is so far down the list that I've never even drawn one.. lol mac Please remove splinters before emailing |
#37
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Bike wheel for a bandsaw..
"Jack Stein" wrote: Out of curiosity, why do you need fiberglass side walls? It simplifies construction. I often thought of building one of those plywood band saws but since I already have a good band saw, I probably won't. I'd like to have a giant resaw band saw, dedicated to resawing, but... If you are referring to the kit from Gilliom Mfg, I built that saw. Gilliom supplies die cast 18" dia wheels as part of the kit. -- Lew Hodgett Box 2302 Whittier, CA, 90610-2302 E-Mail: |
#38
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Bike wheel for a bandsaw..
On Thu, 17 Jul 2008 00:17:16 -0700, Father Haskell wrote:
I've seen plywood used. Laminate 2 pieces of 3/4" and install the hub. Cut out the wheel with a router on a trammel arm. True to the last hair of a thousandth of an inch with a scraper or file held against the wheel while turning it (by hand) after installing the wheel in the frame. Dial-gauge true, or is that pointless with wood? (I expect so) Glue on a tire, and she's ready to go. How much do tyres stretch - i.e. do I make it 12" diameter exactly for a 12" tyre, or slightly under, or what? Balanced wheels turn smoother. Install nuts and bolts where needed to add weight and reinforce the lamination. Should be simple enough... although it seems like it would be easier to balance it by drilling holes or adding screws... |
#39
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Bike wheel for a bandsaw..
Lew Hodgett wrote:
"Jack Stein" wrote: Out of curiosity, why do you need fiberglass side walls? It simplifies construction. OK, but seems just the opposite to me. I often thought of building one of those plywood band saws but since I already have a good band saw, I probably won't. I'd like to have a giant resaw band saw, dedicated to resawing, but... If you are referring to the kit from Gilliom Mfg, I built that saw. Yes, something like that. Like Mac though, for me it's down the priority list enough I'll never get to it. I'd have a better chance of stumbling over a nice used one than building one I guess. Gilliom supplies die cast 18" dia wheels as part of the kit. If they supplied just the bearings would you have any qualms making the wheels out of plywood? I still think plain plywood would be simpler than building high speed radial fans for dust collectors that many seem to have built out of plywood. Even I have some reservations about that, but I'd do it if I had to... -- Jack http://jbstein.com |
#40
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Bike wheel for a bandsaw..
"Jack Stein" wrote: If they supplied just the bearings would you have any qualms making the wheels out of plywood? For me, NBD, but see below. If you are going to use plywood as a core, then you want to totally encapsulate it with epoxy and fiber glass. The plywood is now totally sealed, and you are no longer dealing with wood other than as a core material. If you want to make an 18" wheel, laminate a couple of 19" dia pieces of 12mm, 4 ply, CDX plywood together with some TiteBond II. (You can use deck screws as clamps, just sand down the tips when finished and leave them installed) When cured, drill a centered thru hole with a hole saw that is 2-3 times the dia of the axle. (My guess is that 1-1/4 or 1-1/2 would be about right.) Close the bottom of the hole with masking tape, lay flat on table, and pour in about 1/2" of micro-balloon thickened fairing putty and let cure over night. Next day, remove tape, mix more thickened putty, and fill both sides proud using a putty knife or equal to apply. When cured, sand putty smooth on both sides, then apply a layer of 17OZ, double bias glass on top side and let cure. Next day, glass other side. When both sides are cured, sand glass with some 60 grit to remove any drips.and overlaps around outer circle edges. Center drill a thru hole for the axle. Notice that you have just drilled thru glass and putty, but the plywood is still sealed. Using a router with a 1/2" carbide straight bit and a radius jig, trim wheel to 18" finish dia. (Buy a new, low cost carbide blade, use it, then toss it because the fiberglass will have destroyed it.) Glass the tread with some 6 oz, glass tape, 2" max width. Glass 2/3 of wheel at a time. When cured, rotate wheel and finish. When cured, sand overlasps smooth, then tape again until you have 3 layers of glass tape. Trim off excess glass with a sander. You are now ready to install axle and rubber for tire. Balance as required. As I said, straight forward construction, just a PITA to do it. -- Lew Hodgett Box 2302 Whittier, CA, 90610-2302 E-Mail: |
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