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Tool Talk Discussion Forum

Drill Press Chuck

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IowaDave

03-20-2004 14:50:29

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Have a shot at a free drill press, need to find a chuck. The current owner had a fairly savvy tool shop special order 3 before giving up and buying a new one. Here's the particulars:
Make: Omni
Year: 1979
SN: 14227
Model(Exactly as it reads on the plate): BM 1/2 - 5SP

The current owner describes the chuck as "a tapered chuck, 11/16 inch @ the top, 5/8 inch @ the bottom"

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Art

03-22-2004 04:16:27

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Re: Drill Press Chuck in reply to IowaDave, 03-20-2004 14:50:29

The drill press itself probably has a #3 morse taper in the head. If the measurments that you gave are for the hole in the chuck then it is a #6 jacobs taper. Very common item. Jacobs shows chucks available up to 5/8"cap. with a #6 jacobs taper mount.

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Charles (in GA)

03-20-2004 21:06:41

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Re: Drill Press Chuck in reply to IowaDave, 03-20-2004 14:50:29

On drill presses that use arbor mounted chucks, the spindle in the drill press (the part that moves up and down with the handle and has the slot in the side is a Female Morris taper, very possibly a MT4. You insert into this an arbor, which is male MT4 or whatever Morris taper it is, and on the other end of the arbor is a much shorter slightly steeper taper, known as a Jacobs taper. You can get arbors of various combinations, such as MT4/JT4 or MT4/JT33 or whatever. You need to find out what female Morris taper you have in the press and decide what size chuck you want, then you can arrive at what arbor you need to mount it.

there are a lot of chucks on Ebay, if you are patient and savvy, you can find a nice looking one of the size you want, many times with the arbor installed (though many times its the wrong arbor)

Go to the web page below that I created for this post and you'll see what I'm talking about.

Hope this helps,

Charles

How to remove a drill press chuck, pic sequence

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Slowpoke

03-21-2004 16:55:32

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Re: Re: Drill Press Chuck in reply to Charles (in GA), 03-20-2004 21:06:41

Good pics for showing how to remove a chuck, but you should use a "drill drift", which is the correct tool for that job. It's a flat, tapered piece of hardened steel, available in several sizes. Check out the Grainger catalog or other industrial sellers.

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Charles (in GA)

03-21-2004 19:05:32

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Re: Re: Re: Drill Press Chuck in reply to Slowpoke, 03-21-2004 16:55:32

Thanks for the info, I'll look for one in Grainger or MSC (We have a Grainger super store close to work and get a substantial discount) The arbor came out easy, a little down pressure and a tap of the brass hammer on the side of the spindle, but the right tool for the job is always best for not damaging anything.

Glad you like the pics, it was a 30 minute quickie to take pics and make the page and upload it. I was afraid no one would scroll far enough down the page to find it..... posts accumulate pretty fast here.

Charles

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Charles (in GA)

03-20-2004 21:14:16

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Re: Re: Drill Press Chuck in reply to Charles (in GA), 03-20-2004 21:06:41

Forgot to mention, the drill press I shot the pics on is a $600 surplus/damaged $20 inch Dayton sold by Grainger ($1200 retail). It was dropped on the front of the head and cracked the area where the switch was. This is a false front and adds no structure to the press, it drills nice snd straight. I added a forward/reverse switch to the side of the head and it works great. The chuck in it is a cheesy Taiwan made one (actually works OK though) and won't open to 3/4 inch, so just today I bid on and won a Jacobs 18N chuck on Ebay. Ball bearing chuck, and I can use it in the tailstock of my Smithy also.

Charles

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Keith-- OR

03-20-2004 19:06:33

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Re: Drill Press Chuck in reply to IowaDave, 03-20-2004 14:50:29

I have a real good friend that is a machinist,about 40 years of experience, told me that "most" med.size drill presses use the standard #3 taper as some have suggested. there should be a slot mid way up your spindle this is to remove the tapered chuck. I would not machine it to a straight shaft. The taper allows you to use the larger drill bits that have the taper shank. These bits are cheaper in the larger sizes aBOVE 1 inch. I have drill press that uses the # 3 taper, would not trade it for one with standard chuck.....

just my nickles worth

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wdTom

03-20-2004 18:02:44

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Re: Drill Press Chuck in reply to IowaDave, 03-20-2004 14:50:29

Any of the industrial/tool catalogs will have many chucks from about $15 to $115. If you can't get the right taper take the spindle out and turn it straight and (while in the lathe) thread it for 1/2 or 5/8 and screw a chuck on.

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jhill

03-20-2004 16:37:25

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Re: Drill Press Chuck in reply to IowaDave, 03-20-2004 14:50:29

Most likely it is a Jacobs no. 3 taper. New one is $80.00 plus. Try Enco's website they have both Jacobs and less expensive offshore chucks.

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Rod (NH)

03-20-2004 16:13:18

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Re: Drill Press Chuck in reply to IowaDave, 03-20-2004 14:50:29

Hi Dave,

There are a number of standard tapers. As far as I know, drill press chucks utilize the Jacobs tapers but others may be used also. It sounds like the drill press you mention is an "offshore" model. I have a similar one from Taiwan with a make of "acme" instead of "omni". It's from the same period (about 1980). I replaced the chuck (5/8" capacity) on it years ago because the original was pretty cheap in quality. The machine had a JT#3 spindle which was identified (fortunately) on the nameplate. That made it a "Number 3 Jacobs Taper". It looks to me like the one you are talking about is 1/2" capacity, judging from the madel number. Mine is a model BP58, I assume that the 58 is a designator for 5/8" capacity. My model number has no other numbers or letters after the BP58 so I have no idea what the 5SP might signify. Hopefully it is not some kind on mongrel "special" taper. You might want to check out the spindle using some closer measurements. A JT#33 I think is relatively common for taper chucks in the 1/2" capacity range.

You will find that chucks are not cheap by any means. If you are lucky enough to find one with the correct mount, you may also find that the cost of the chuck is more than the press is worth. As I remember, when I bought my replacement chuck years ago, the chuck was a third of the cost of the entire machine. Of course the chuck was a relatively high quality Jacobs compared with a relatively low quality drill press :o).

Good luck in finding a chuck. You can browse the readily available ones at McMaster Carr and get an idea of prices.

Rod

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bob

03-20-2004 18:21:31

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Re: Re: Drill Press Chuck in reply to Rod (NH), 03-20-2004 16:13:18

The 5SP likely means that the belt pulley sheaves are 5-slot, meaning you have a 5-speed press by moving the belt to a different set of sheaves on the pulleys.

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bill b va

03-20-2004 16:00:02

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Re: Drill Press Chuck in reply to IowaDave, 03-20-2004 14:50:29

sounds to me like a standard jackobs taper chuck.

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03-20-2004 15:39:09

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Re: Drill Press Chuck in reply to IowaDave, 03-20-2004 14:50:29

Replacing a worn chuck is common. If memory serves " Jacobs " is one company that makes chucks for many tool brands. In my limited experience I would careful compare available chucks with what exactly fits your drill press. You should be able to find something and maybe have several options. My 1/2" drill press does not have a tapered chuck. I think the advantage of the tapered chuck gives you a quick change option. Wish I could be of more help.

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