I have an 30 plus year old 6 inch craftsman jointer that the bed adjustment stopped working today. There is a threaded shaft that the knob turns freely in both directions but the bed does not move either way. Looking for some advice from the more mechanically inclined as to what may be the problem and how to correct.
Thanks in advance.
Jeff
Replies
Sounds like something is stripped. Take it apart and find out what the problem is. I repair equipment and that's what I have to do to diagnose the problem. I'm sure it's fixable.
Jeff,
If you can look in under the table, with a good light, you can possibly identify the problem without having to take the machine apart right away.
Look underneath and turn the knob, does the shaft that knob is mounted on turn? If it doesn't the knob has loosened and this can probably be fixed easily. If the shaft turns but the table doesn't move then the problem could be in the block, mounted to the underside of the table, that the shaft is threaded into. The block could have come loose or the threading is stripped, in either case the machine will need to come apart to make repairs.
A third possibility is that the shaft where it goes through the block right behind the adjusting knob has had a collar come loose, or the block itself has come unbolted, so that the shaft moves in and out instead of the table moving. You will probably have to take the machine apart to fix this.
John Whit
Shop Manager for FWW Magazine, 1998-2007
Thanks for the response. The shaft does turn and the whole knob moves in and out rather than the table. There appears to be about a one inch long tube over shaft. Is that threaded and maybe stripped?Golfisher
There is some kind of collar on the shaft that bears against the back of the block behind the knob that the shaft goes through. The collar has loosened, it is probably held by a set screw, I'm not sure about the tube, are you sure it isn't just the unthreaded shaft? If you can give me the jointer's model number, something like 113.xxxxxxxxx off of the nameplate I might be able to look at a parts sheet and tell you more. There may be a similar number on the motor but I need the one off the machine.If the collar is loose you might be able to get a hex key in to tighten it, but it is more likely you will have to remove the table. If the block is bolted to the base casting, rather than being part of the casting you can possibly remove it and the shaft to get at the collar.John W.
Thanks.
Model no. 113.208931
serial no. 1069.P0052Golfisher
I couldn't turn up anything under that model number, which is surprising, so I can't narrow things down more than I already have.John White
Thanks much for the help.Golfisher
Do you know if the male and female dovetail slide in and out of each other for table to raise and lower? or might them being stuck together be the problem?
ThanksGolfisher
Without knowing what type of machine you have I can't answer your question about how the table moves. but basically, if the table is sticking, then the additional strain on the raising mechanism could be enough to break or strip a part. At this point, based on your description, something is actually stripped or broken and will have to be fixed. If the tables are binding that problem will also need correcting at the same time.John W.
golfisher:
I'm thinking boat anchor here! Does the jointer have a fixed outfeed table? Craftsman used to sell one that had an adjustable infeed table and the outfeed table was a part of the body casting. If yours is of that type,pull it off the base and turn the whole thing upside down and check that the mechanism that holds the table and allows height adjustment is not falling apart! I've got a neighbor with one of these things and when we turned it upside down we found all the hardware had worked loose over the years and once everything was all tightened back up and adjusted it worked just fine.
Good luck
Madison
Thanks!Golfisher
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