Delta shaper spindle over travel

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Forum topic by Ap1 posted 02-21-2016 02:17 PM 908 views 0 times favorited 5 replies Add to Favorites Watch
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4 posts in 856 days

02-21-2016 02:17 PM

Topic tags/keywords: shaper help

I have a delta 43-379 3hp shaper and for some reason I cranked the spindle all the way up to compensate for my coping sled and it over traveled. Now I can’t move the spindle up or down at all. I hope the brass raising but hasn’t been stripped out. Anyone have experience with this issue? If so what are my options to get my shaper back in business

5 replies so far

View JBrow's profile


1361 posts in 944 days

#1 posted 02-21-2016 05:14 PM


The only ideas I can come up with (in this order) are:

1) Make sure the locking mechanism that keeps the spindle from moving during shaper operations is disengaged. I am sure you have done this, but I mention because I have spent a long time trying to fix problems when the only problem was that I forgot to do something as basic as this.

2) Check the manual, including the troubleshooting section. Perhaps this is a problem addressed by Delta. Also looking at the exploded parts diagram could help understand what happened.

3) Inspect the mechanism carefully looking for any object, maybe a piece of wood, caught in the mechanism where any two parts move against one another. A mirror can help see into places otherwise not visible.

4) Apply a little thin spray lubricant to the raiser mechanism wherever parts move against one another. Let it set a soak, and then try to un-seize the mechanism. Perhaps the threads at the end of travel are engaged, but rusted and the mechanism seized. Also a couple very light downward blows with a hammer could be tried after the lubricant has soaked.

5) The riskiest thing to try would be to place a board on top of the spindle, long enough so that it can be clamped to the table, one clamp at each end of the board. Then begin to apply downward pressure on the spindle by slowly and in small amounts tightening the clamps. As the clamps are tightened, try cranking the spindle down until it un-seizes or begins to bite and draw the spindle downward. Care should be taken to avoid applying more downward pressure than is absolutely required.

6) If none of these ideas work, I guess it should be disassembled and put back together, if you can.

View Ap1's profile


4 posts in 856 days

#2 posted 02-21-2016 07:02 PM

Thanks for the info JBrow. The spindle lock was loose(like you figured) and the manual is horrible it has no trouble shooting section what so ever. I have tried tapping on the spindle. I will try the clamping idea( I have removed the spindle cartridge). If that doesn’t work I plan to haul it in to my place of employment and have our maintenance guy help me disassemble it. I work at a very large cabinet shop and I believe he has connections to get a new raising nut machined out of metal instead of brass if mine is stripped out.

View nast's profile


2 posts in 826 days

#3 posted 03-16-2016 02:16 AM


I have a 43-375 that I just acquired and I did the exact same thing. On mine, the raising nut is still in contact with, but no longer engaging the screw. I suspect that the last thread or two may be stripped. From the top, I can see that nearly all the threads are intact, so it will work again but some threads may need to be cleaned up first.

I would be very cautious applying any pressure to the spindle. I applied some downward pressure with a pry bar between the spindle casting and flange as I turned the handle with no success.

I also noticed a tapped hole near the hex guide post. I’m not sure what’s supposed to go there, but I’m going to make a small block to mount there to limit the upward travel.

I suspect I’ll be disassembling mine when I have some time. I’ll report back any relevant findings.

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4 posts in 856 days

#4 posted 03-16-2016 10:36 AM

Nast- I took mine to work and our maintenance guy took it apart and rethreaded the rod and I believe he cleaned the brass raising nut and possibly retapped it. He flipped it over to dissamble it so gravity was on his side with the weight of the motor. Works better now then when I acquired it

View nast's profile


2 posts in 826 days

#5 posted 03-26-2016 01:53 PM

To take it apart, I removed the spindle and placed a bar across the table top and a bar underneath the spindle casting with a threaded rod connecting them. This suspended everything inside the cabinet while the screw and nut were removed. The screw and nut are an acme thread, so the screw got cleaned up with a file and then, with lots of grease, passed through the clean end of the nut to clean up the threads on the nut. I’m back together and working again.

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