I recently bought an old 12″ band saw. The tires need replacing so I ordered new rubber tires and put them on. The instructions say if the wheel does not have a crown milled into it, you have to make a crown in the tire after installing it. What’s the best way to do that?! And how much crown?
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>> What's the best way to do that?!
I don't know if it's the best way, but there was a bandsaw article in FWW years and years ago where the guy used a die grinder clamped to a 2x4 clamped to the saw frame. He said it made nice, smooth tires but sprayed rubber dust all over the shop.
Here's a picture of a die grinder if you're not familiar with the name. This one is pneumatic. Electric ones are also available.
http://www.powertoolsonline.net/ProductImages/tools/1001-1050/TL1022.jpg
From whom did you order the new tires? If it was Iturra, call them and they'll tell you how to do it. What type of bandsaw do you have?
If you have a disc sander, you could rig up something similar to this:
http://www.owwm.com/FAQ/Crowning/default.asp
forestgirl -- you can take the girl out of the forest, but you can't take the forest out of the girl ;-)
Another proud member of the "I Rocked With ToolDoc Club" .... :>)
WOOO! Geting the bug for older iron or just checking out REAL wood working machines?DJK
I assume you checked the bare wheel with a straight edge for a crown. Some saws have flat wheels and don't need a crown. The blades on some are supposed to track with the teeth hanging off the front edge of the tire.
On one BS that I rebuilt with flat wheels, I ran a few 1/8" wide laps of nylon packing tape around the center of the bare wheel then installed the tire. Created a nice .011 crown.
DJK
Here is what I did. I purchased an old Sears Companion, circa 1965 band saw. It did not originally have any crown to the wheels. I wire-brushed the rim of the wheels then layed on a coating of epoxy. After it was cured, I chucked the wheels up on the lathe and turned the crown. Then just put flat tire on it.
As for the radius of the crown; you could turn to page 1056 of the 20th edition of the "Machinery's Handbook" and there find a chart showing the proper crown for wheels of various diameters.
This book states a general rule for crowning which is 1/8" per foot of of rim-width
Edited 1/13/2005 9:55 am ET by mlbfreestyle
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