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Forum topic by dbw posted 01-22-2018 01:01 PM 934 views 0 times favorited 19 replies Add to Favorites Watch
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dbw

207 posts in 1723 days


01-22-2018 01:01 PM

Topic tags/keywords: drill press jacobs chuck

Can I get a recommendation on a QUALITY 5/8” Jacobs Chuck? I have a PC drill press (Lowe’s) and the chuck runs out noticeably. The spindle barely wobbles but once I install the chuck it is a whole different animal.

-- measure 3 times, cut once


19 replies so far

View Sparks500's profile

Sparks500

192 posts in 417 days


#1 posted 01-22-2018 01:26 PM

Stay with Jacobs brand. pricey, but you’ll be happy with the results.

-- A good day is any day that you're alive....

View bdresch's profile

bdresch

148 posts in 1694 days


#2 posted 01-22-2018 01:43 PM

Have you tried reseating your chuck in the arbor? If there is anything between the seating surface of chuck to arbor or arbor to spindle, that could cause your runout.

View Woodknack's profile

Woodknack

12245 posts in 2466 days


#3 posted 01-22-2018 05:27 PM

The spindle shouldn’t wobble visibly at all.

-- Rick M, http://thewoodknack.blogspot.com/

View Fred Hargis's profile

Fred Hargis

5035 posts in 2580 days


#4 posted 01-22-2018 06:37 PM

The Jacobs chucks are very pricey. Is the OEM chuck a 5/8”? The reason I ask is that I upsized my Delta from to 5/8” from the 1/2” OEM and found a substantial size difference between the 2 chucks. I also had to replace the arbor, since the larger one was a JT 4. Anyway, a very good chuck is the LFA, and it’s a lot cheaper than a Jacobs, and it’s made in France…not China (I was avoiding Asian chucks). They come in keyless versions as well. The photo below is the 2 chucks, you can guess which one is the 1/2”.

-- Our village hasn't lost it's idiot, he was elected to congress.

View Woodknack's profile

Woodknack

12245 posts in 2466 days


#5 posted 01-22-2018 07:14 PM

Rohm is another quality brand, German.

But if the arbor is wobbling, it might indicate a bearing problem, or could just be a bent arbor.

-- Rick M, http://thewoodknack.blogspot.com/

View MrRon's profile

MrRon

4928 posts in 3330 days


#6 posted 01-23-2018 01:47 AM

Good chucks are expensive. Maybe you can find a used one on Ebay. A good Jacobs chuck can be rebuilt quite easily. The albrecht keyless chuck would be the best you could put on a drill press. Maybe you can find one used. What is the chuck you now have on your PC? if it is a 1/2” chuck, the spindle probably has a Jacobs #3 taper. I don’t know if a 5/8 chuck is available with a #3 jacobs taper.

View dbw's profile

dbw

207 posts in 1723 days


#7 posted 01-23-2018 12:40 PM

My error. I meant arbor not spindle. This machine has a 5/8” chuck with a #3JT.

-- measure 3 times, cut once

View TheFridge's profile

TheFridge

9880 posts in 1572 days


#8 posted 01-23-2018 01:20 PM

Should be jt33 for the pc drill press.

14n is 0-1/2” I believe. 16n is 3/16-3/4” I believe as well and much larger. I had to get a different chuck recently as well. My 20” has an older 16n Jacobs. The only thing I have with a shank bigger than 1/2 were end mills.

Had a PCB660DP myself before the 20”. Solid machine but the arbors and chucks are trash. You really shouldn’t use an end mill in this press. The chuck will pop off constantly.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

View dbw's profile

dbw

207 posts in 1723 days


#9 posted 01-23-2018 11:22 PM

Is there a difference between jt33 and #3jt? Also: who sells an upgraded arbor?

-- measure 3 times, cut once

View Woodknack's profile

Woodknack

12245 posts in 2466 days


#10 posted 01-24-2018 12:23 AM



Is there a difference between jt33 and #3jt? Also: who sells an upgraded arbor?

- dbw


Jt33 and Jt3 are 2 different machine tapers, specifically Jacobs tapers.

Http://littlemachineshop.com/reference/tapers.php

I’ve never had a bad arbor so I can’t help with that. Any decent brand should be good enough.

-- Rick M, http://thewoodknack.blogspot.com/

View Nubsnstubs's profile

Nubsnstubs

1336 posts in 1816 days


#11 posted 01-24-2018 12:38 AM

Go to MSC, and look it up. Can’t go wrong with all the info available. ............. Jerry (in Tucson)

-- Jerry (in Tucson) www.woodturnerstools.com

View Fred Hargis's profile

Fred Hargis

5035 posts in 2580 days


#12 posted 01-24-2018 11:54 AM

Both ends of the arbor need to be specified, and my guess if the DP is MT2. That was a good suggestion to check MSC for info, but arbors can be bought in a lot of places, once you know which one you need search for it.

-- Our village hasn't lost it's idiot, he was elected to congress.

View Redoak49's profile

Redoak49

3403 posts in 2075 days


#13 posted 01-24-2018 12:26 PM

I think one should match the chuck to the drill press. Good chucks get expensive very quickly and a Jacobs chuck could be around $200.

I had a Jet floor model drill press and had a lot of run out. I was looking at new chucks. I rest the arbor several times with little improvement and found that I had quill slop. Unfortunately, most lower cost drill presses have no way to tighten the quill. Instead of a new chuck, I bought a new drill press with very low run out.

View dbw's profile

dbw

207 posts in 1723 days


#14 posted 01-24-2018 02:36 PM

I just now checked. The chuck on my machine is stamped JT3 and the owner’s manual specifies a MT2 arbor. So I have a 5/8” JT3 chuck with a MT2 arbor.

-- measure 3 times, cut once

View TheFridge's profile

TheFridge

9880 posts in 1572 days


#15 posted 01-24-2018 06:14 PM

Gotcha. Mine was jt33. Easy to look up Taper dimensions. It’s everywhere.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

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