I Feel Stupid
February 4th, 2009Wood is the Answer
I actually used my bandsaw yesterday. Unbelievable, isn’t it?
I didn’t really make anything with it. I drew lines on a piece of scrap and tried to follow them. I just wanted to see the silly thing work. It turns out a bandsaw requires a little skill, which is a bummer, because I don’t have any. But I’ll work it out.
I fixed one of my last major tool needs by ordering a pneumatic orbital sander that collects its own dust. That pretty much leaves a belt grinder and a milling machine to round out the workshop.
The belt grinder quest is frustrating. It looks like a nice new one costs maybe $900, and if you make one yourself, it costs $850. Another irritation: there are a number of free sets of plans out there, but as far as I know, they’re all “no weld” plans. What the hell? Who has a drill press, cutting tools, and the skill to assemble a grinder, but NO WELDER?
I would much rather weld than buy 400 pieces of thick metal, spend 300 hours drilling precision holes in them with a drill press which I don’t have yet, and then bolt them together.
One guy–he wrote a book on knifemaking–has a wonderful solution to the problem. It’s one of those solutions that are so simple and obvious, it’s amazing that no one else does it. He makes belt grinder frames out of wood.
Why not? Think about it. Metal grinder frames are horrendously overbuilt. Do you really need two half-inch-thick plates of steel to hold a grinder bearing? I very much doubt it. You could put a hook in a piece of steel like that and hang a pickup truck from it. A piece of a two-by-six should be more than sufficient. I have enough scrap in my garage right now to build a zero-cost frame and find out. The knife guy used maple, but I don’t see the need to spend that kind of money. Softwood is not weak. Two days ago I lifted a 367-pound saw on a hoist supported by a two-by-eight across three two-by-sixes, and I didn’t hear or see a single sign of stress.
A steel frame would be nice, but it would weigh twice as much, and I’d have to clean and paint it, and what’s the advantage, exactly? I can’t see one.
Yesterday I considered hitting Harbor Freight to buy one of their nearly-free cheap belt grinders, because to build a metal belt grinder, you need a belt grinder. Now I think I should just slap a frame together out of scrap and see what happens! Worst case scenario: I get rid of an annoying pile of wood.
Oh, man. This could be fun. I could make DADOES. I could make TENONS and MORTISES. Oh joy.
I almost broke down and bought a drill press yesterday. I still might. I think a bench model might be a good thing to have, even if I get a mill. It should be more convenient for most jobs. But the price! A decent one is $350. I have seen the Ridgid floor model for $224 at Home Depot. If it’s still available, maybe I should consider it. At the regular price, it would make my cheapness gene vibrate. I’ve been checking Craigslist, too.
I better go do an inventory of my scrap.
February 4th, 2009 at 10:34 AM
I’ve never seen a belt grinder at Harbor Freight; otherwise, I would already have one.
February 4th, 2009 at 10:35 AM
One-inch belt; forty bucks. I think they call it a “sander.”
February 4th, 2009 at 10:42 AM
I am intrigued by the wooden grinder. Did you find plans for one, or are you designing it yourself?
Also, my sister goes in for more testing tomorrow if you would say a prayer or two when you have a moment…
February 4th, 2009 at 11:02 AM
I don’t think you need much of a plan. I have plans for “no weld” grinders, and it should be possible to use the measurements and replace most of the stuff with wood.
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Thanks for the alert about your sister.
February 4th, 2009 at 11:22 AM
Steve, maybe you need TWO drill presses.
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Start with a little benchtop model, just big enough to do small to medium jobs, and convert it to a dedicated drum sander or parrot toy maker or something once you decide, based on your newly acquired experience, just what kind of monster (milling or otherwise) you need to acquire for huge jobs.
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The ability to put reliably perpendicular holes in things becomes more an more essential the longer you live with it, as you think of new things you can only do with that kind of capability. I turned cribbage pegs on mine once!
February 4th, 2009 at 12:28 PM
The important bit in a grinder frame, as with any flat-belt system, is stiffness and stability. Flat belts require pulleys that are thicker in the middle, because the belt will always move to the point of maximum tightness. If the frame shifts when you apply pressure — for instance, putting the work against it — the belt will move sideways. You cannot stop that effect by putting flanges on the pulleys. The flanges will just destroy the edge of the belt, or (if the belt is loose) serve as the ultimate tight point and cause the belt to leap off.
If wood is stiff and stable enough, go for it.
Regards,
Ric
February 4th, 2009 at 9:36 PM
“Another irritation: there are a number of free sets of plans out there, but as far as I know, they’re all “no weld” plans. ”
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Those sorts of universal plans are drawn up so that the typical pantywaisted suburbanite won’t feel his sissyhood when he makes something. You know the type I mean, those guys with the baby food jar storage system. eeegads!!!
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Real men ignore the directions for bolts and screws and go on and weld it together. You of course, would do it with wire, myself, I would have to dig out some sticks of 6011 and go to work (being the simple person I am).
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I would probably change out of my sandals first though.