broken, stuck shaft on bandsaw wheel
Kevin_Smith | Posted in Power Tools and Machinery on
I am replacing a broken shaft on my Craftsman 12″ bandsaw. The shaft holds the lower wheel. It broke at the point it enters the machine back. I have beat on the broken shaft from both sides to no avail. It refuses to budge. The shaft is stuck in a bearing and spins freely. Anyone have a tip for me? Thanks for your help and have a great father’s day.
Kevin
Replies
first look for any kind of lock ring. an e clip or a snap ring. that could we holding things up. after that you might try a little heat ,like a propane torch . lots of times that will help break loose a frozen part. of course clean all the fine sawdust up as this would be a fire hazard.
I would be lost in this situation without a gear puller, even then it may not be easy. Maybe you could drill it out with sucessively bigger drill bits, also not so easy.. Trying to pound it out may just swell the end of the shaft.
Edited 6/21/2009 8:00 pm by oldhand
If it is possible, place a wet rag on the shaft at the same time heat the pillow block that contains the bearing,use a heat gun. Keep the rag wet. After ten full minutes heating the pillow block, tap the shaft gently thru the bearing. Install a new shaft the same way unless you can easily remove the pillow block .Bear in mind you may have screwed up the bearing .The shaft will come off fairly easy if you keep it cool while expanding the bearing with heat.
mike
The same way the put railroad wheels on axels. Heat the wheel(bearing) and cool the axel (shaft). Slide them on and let em cool.
AZMO <!----><!----><!---->
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-------(*)/ (*) http://www.EarthArtLandscape.com
Yup, grandpa came from a family of wagon makers. He told me how they heated the iron rim for a wooden wheel and let it shrink cool. Much the same as the railroad men sliding the wheels on the axel.
mike
Mike,
What a memory your post jogged.
I used to do that job, among others, applying bearings to traction motors, at a Chicago NW locomotive rebuild shop.
We'd heat the bearings in a small oven (if it wasn't in use for our dinners), then pull it out of the oven and quick run over and slide it onto the axle.
Oh baby, you did not want to get that thing on cock-eyed and have it cool off before being able to seat it! There was an eensy-teensy chance of re-heating it with a torch and pulling it off, but usually it had to be cut off (and then quick disposed of in the scrap metal bin before the foreman happened along).
-jonnieboy
I have to ask how did it break? Is the shaft have rust on it? I've restored quite a few old tools and it always seems to be a bit of corrosion or maybe sawdust that holding it in. Try spraying it with a penetrating oil and giving it over night.
Generally speaking hammering on a shaft only will cause more damage somewhere else. I always try a gear puller of a press if I can.
Pictures might help get you a better explanation.
"You cannot antagonize and influence at the same time. " J. S. Knox
Do you have the owner's manual with a parts drawing showing how the saw is assembled?
Or a model number to look it up on Sears' parts web site?
kreuzie
>gear puller
You may be able to rent a gear puller at an equipment rental place or an automotive supply store like Checker Auto or Auto Zone. Once the penetrating solution frees it up enough to move add some light oil before pulling further to prevent galling which will cause it to bind up again.
roc
Give me six hours to chop down a tree and I will spend the first four sharpening the axe. Abraham Lincoln ( 54° shaves )
Does your bandsaw look like this one ?
http://cgi.ebay.com/WALKER-TURNER-3110-12%22-Band-Saw-Parts-Manual_W0QQitemZ310131471653QQcmdZViewItem
roc
Give me six hours to chop down a tree and I will spend the first four sharpening the axe. Abraham Lincoln ( 54° shaves )
Some where between these two tools:
http://www.youtube.com/watch?v=I6y7tSPvmf8&feature=fvw
or
http://www.youtube.com/watch?v=QhBADmrMufs
and my favorite technique:
http://www.youtube.com/watch?v=JU5QIEb3BoM&feature=related
): )
roc
Give me six hours to chop down a tree and I will spend the first four sharpening the axe. Abraham Lincoln ( 54° shaves )
Edited 6/22/2009 3:45 am by roc
Edited 6/22/2009 3:46 am by roc
Kevin,
How did you ever come out on this?
The picture on my profile is of a broken pulley-wheel from a 12" Craftsman bandsaw. I pretty much re-built it from the bearings up over the winter. I inherited it, so I'm not complaining.
Someone before me had customized the bearings and spacers on the lower pulley-shaft with pieces of pipe hammered onto the shaft.
Hey, when it all went back together and I measured everything, it was perfect. The craftsman had met the Craftsman, and victory was his.
I feel like I was lucky to get everything back together, but if my experience might be of any help, let me know.
--jonnieboy
Kevin
Bearings in this size range are NOT heated for installation.
The bearing is locked on the shaft so the shaft will not float while its running. One of two things are holding the bearing. Check for a set screw in the side of the bearing collar or a small set screw holding a rotating cam lock around the shaft. It can be loosened by rotating or counter-rotating the cam lock.
If the shaft is broken and the bearing is flange mounted, you may be able to remove the entire assembly from the machine to work on it.
My recommendation. You have to replace the shaft anyway, it would be wise to replace the bearing too.......they are cheap and you already have the machine disassembled.
If the flange is on one side of the cabinet and the wheel on the other side, you may have to hacksaw the shaft in half to separate the pieces.
I don't expect rust to be your issue or your whole saw would need to be trashed.
Good luck.
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