Reply by KTNC

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Posted on How to eliminate RAS arm wiggle

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96 posts in 708 days

#1 posted 08-01-2018 12:08 AM

Hi Crizal:

If the arm is actually locking to the column and you notice the end of the arm is moving anyway, I think that means the column is not tightly connected to the base. Depending on which model you have the means of correcting that is different. I recently restored/repaired two Craftsman RAS. One from the 60s and one from the 90s. Post a picture of your saw and the model number and I might be able to help more.

If you mean the arm moves side-to-side a bit after the zero or 45 degree index engages and before you engage the lock, that’s slop in the index. That is normal, but there should be no side to side movement once you lock the arm to the column.

If you want to get your saw running well, get a copy of “Fine Tuning Your Radial Arm Saw” by Jon Eakes. He goes through tune-up on three saws, one of which is a 1980s Craftsman. He also explains how to get precision from your RAS even though the miter, bevel and yoke rotation indexes and elevation all have slop.

You’ll need the user manual also. You might be able to get it at or

regards, Kerry

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