help rebuilding a drill press

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Forum topic by Paul posted 12-12-2010 08:27 PM 3767 views 0 times favorited 4 replies Add to Favorites Watch
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223 posts in 2876 days

12-12-2010 08:27 PM

I was given an craftsman drill press (113-21371) a few years ago. Mfr date is 11/1977
It has significant wobble at the bit.
I have pulled off the belt and the motor pulley has wobble. with the pulley off the motor runs smooth.
I believe that the chuck is not exactly centered also or something. The shaft that drives the chuck has not so much wobble and I believe that is due to the effects of the chuck and pulley. The wobble is more evident at the chuck.
If I wanted to buy new pulleys where would I get them ?
also how do I remove this chuck? it is a Jacobs 633c 33 taper

4 replies so far

View Lee Barker's profile

Lee Barker

2170 posts in 2274 days

#1 posted 12-13-2010 01:04 AM

If you still have such a thing as yellow pages, look under “power transmission.” The pulleys you buy at hardware stores aren’t so good; to minimize vibration you need good components. The same purchase advice goes for belts, too. Pay a little more, get a lot more.

-- " his brain, which is as dry as the remainder biscuit after a voyage, he hath strange places cramm'd with observation, the which he vents in mangled forms." --Shakespeare, "As You Like It"

View Paul's profile


223 posts in 2876 days

#2 posted 12-13-2010 01:27 AM

aren’t there shims used to force off tapered chucks?
where would I buy these?

View jeepturner's profile


939 posts in 2216 days

#3 posted 12-13-2010 01:38 AM

found a manual,

-- Mel,

View EEngineer's profile


1055 posts in 3037 days

#4 posted 12-13-2010 04:17 AM

If your drill press has a 33 taper and it isn’t rusted solid, it should never take anything more than an open end wrench or a spanner wrench adjusted to just the size of the stub showing above the chuck. Put a rag on the drill press table to catch the chuck. A sharp rap on the end of the wrench handle should pop that baby right off. I’ve never used any other method on my two drill presses. If a sharp rap doesn’t remove the chuck DON’T get a hammer! Try the shims/wedges as suggested above. They are available from Mcmaster carr here

#2, 3, or 6 tapers usually have an oval hole in the drill press quill and a taper that inserts into the hole that is tapped with a hammer to drive it out. (There’s a youtube video illustrates this)

Cordless drills and small (3/8”) chucks are usually screwed onto the spindle (youtube video shows how to remove these)

If the chuck seems to be the source of “wobble” then the chuck may be roached. Tightening the chuck way too much will flatten the points on the jaws of the chuck and not allow the chuck to keep a drill bit centered. There are sites on the web that show how to inspect chucks to see if they are roached (not gonna look this one up – Google is your friend)

After that I would suspect quill bearings. OWWM is a great source of quill disassembly/bearing replacement info (again, Google is your friend)

I strongly doubt that the pulley on the motor is causing any “wobble” or runout problems at the drill bit.

Good luck!

-- "Find out what you cannot do and then go do it!"

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