Jacobs 14N Super Chuck New v Old

Рет қаралды 1,493

Күн бұрын

The Jacobs Super Chuck can be found in most machine shops across the USA. The old style is most likely made in USA has ball bearings in a race without a cage. We show the new style and how they differ internally and externally. bit.ly/2KYUJKO
Chapters
0:00 Bits
0:27 NEW v OLD
1:56 Tools to Rebuild
3:14 14N Example
4:12 A look inside
5:00 Press Ring
5:26 Part Numbers in Description
Fits
The Sleeve ID, and the Split-Nut form a Press-Fit. This holds everything together. The very bottom of the arbor also has a ring and forms a slip fit with the Sleeve to help avoid contaminants entering the chuck.
History
Arthur I Jacobs really did a beautiful job with the design of this chuck in 1900. We captured it in this article-check it out bit.ly/3pXsHOD
Tech Articles
bit.ly/3pXsHOD
bit.ly/2KYUJKO
bit.ly/2LjzCCB
Tools Used
Service Ring: bit.ly/35fiXHl
Bit Box: amzn.to/390O1Mf
Costs as of Publish Date (Repair Kit without Sleeve)
McMaster Old Kit. 2815A53 $118
McMaster New Kit. 2815A43 $178
Other Useful Part Numbers for all Jacobs Super Chucks
From our basic research here are the Ball Bearings for each chuck. The race needs to be as full as possible to evenly distribute the load. The quantities for each chuck vary from 29 for the 8-1/2 to 36 for the 20N.
Tight Tol $$$$$ Probably These $
Chuck. BB Diameter. McMaster Number. McMaster Number
8 1/2N 1/8" 9528K45 9528K11
11N 5/32" 9528K47 9528K12
14N 3/16" 9528K48 9528K13
16N 3/16" 9528K48 9528K13
18N 7/32" 9528K49 9528K14
20N 1/4" 9528K53 9528K15
Chuck. Key #. JT Arbor #. JT Arbor Dia(In). Using 7000# grease Force=
8 1/2N 30 2 0.559 1300 (no room for Zerk)
11N 32 2 0.559 1300
14N 3 3 0.811 3000
16N 4 3 0.811 3000
18N 4 4 1.124 5900
20N 5 5 1.413. 9500
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Пікірлер: 15

@OldIronShops 3 жыл бұрын

Now I'm hunting for a fixer upper 14n

@EvolventDesign 3 жыл бұрын

Great, save a 14N and enjoy the rebuild

@travisboggus5673 Жыл бұрын

Do you make the service rings or are they available commercially?

@EvolventDesign Жыл бұрын

Yes. We make them evolventdesign.com/collections/all/products/jacobs-chuck-service-ring

@dizzolve Жыл бұрын

here's something that MIGHT help some people. I just discovered my 13 South Bend (same spindle opening as the Heavy 10)...... it's collet remover / thread protector is right about the right size to slide over my 14 old school Jacobs. Now depending on your's and how much thread relief there is on the end, you might only get an eighth inch of movement. Mine looks like it might be shop made and I was able to get my jacobs completely pressed off. Good luck

@LiquidSilver1 Жыл бұрын

Do you have any rebuilt ones for sale???

@EvolventDesign Жыл бұрын

No, we do not. Thanks for your interest.

@jcs6347 3 жыл бұрын

Question: Without taking the chuck apart, how do you tell the old school from new school? The exterior groove pattern on the sleeve? Thanks, PS can over from Stan's and checking out your other videos.

@EvolventDesign 3 жыл бұрын

Good question! Yes, the exterior groove pattern on the sleeve. There is actually a third version -the oldest of them - and it has a knurled sleeve. They are fairly rare.

@jcs6347 3 жыл бұрын

@@EvolventDesign We have in business since 1898 and I still find a few things around that I have no clue what they are. I will look and see if I can find an old Jacobs chuck. We also have a gear hobb that the company made around 1905. We used to make manufacture low rise traction elevator machines up to 2001 and used the hobb to make the brass gears we used on the double centers. We use it rarely now for replacement parts.

@BBVideosTFS 10 ай бұрын

It pains me to see such a beautiful chuck treated by a second class key.

@EvolventDesign 9 ай бұрын

Yes, we get it. More vintage tools are always on our radar

@bjjbjunior4408 9 ай бұрын

There are 3 versions of the old Superchucks. To truly know the difference you need to open them ALL up to reveal the inside builds. None of the three have compatible parts. The two early versions have large 3/16" bearings in the 30 to 35 count area. The new crap service models have smaller bearings. The sleeves are different on all three models. The split nuts, jaws, bearing race design, all different. The absolute no question best of all, are the ball bearing Superchucks with the straight side sleeve. The entire body, bearings, split nut, and jaws are fully hardened. Can only be drilled out with a carbide or diamond drill bit, if you need to remove a stuck arbor. The new ones can be drilled with a basic drill bit, they are that soft. The results are mushroomed bodies next to the jaws, crap. So maybe follow up when you get all three next to each other, and do a real comparison. Sorry to be so harsh.

@EvolventDesign 9 ай бұрын

That is interesting and I am glad you have shared that with the channel. We did know there were some special older models that had a spiral bevel gear form as the mating style to the key. But those are pretty rare. When I get a chance I will gather them all together and compare them. Thanks for watching.

@ellieprice3396 3 ай бұрын

I just finished disassembling, cleaning and oiling my older 14N. It didn't need rebuilding and is in excellent condition. This older design contains 32 3/16 balls and is known as a "full complement" type. The newer type contains fewer balls in a plastic cage.