The Jacobs 6A-33 Medium Duty Chuck was a very popular choice for makers of drill presses. Makers like Rockwell, Craftsman, Delta, Milwaukee and others installed this on their benchtop drill presses. And the 6A-33 has a large capacity range from nearly...
zero to 1/2" this chuck could handle a wide range of drill shanks. Our research into new spare parts has come up with a big zero, but with some care and effort a stuck, sticky or bit-dropping chuck can almost always be rebuilt. Some hurdles exist, but with a modest set of tools, cleaning & grease you can rebuild this chuck and enjoy they way it was intended by the original maker.
Chapters
0:00 6A-33 Jacobs Chuck
0:36 Sourcing Parts
1:49 Removing Sleeve
3:30 On the Bench
4:00 Split Nut
5:21 Cleaning
6:24 Jaws - Burr Removal & Stoning
8:25 Lube & Assembly
11:18 Press on Sleeve
11:59 Old Drill Press Example
Numbers
Jacobs 6A-33 Medium Duty Chuck Code 02067
Sleeve Kit S6
Jaws and Split Nut Kit U6
Key K3
Mounting Taper 33 JT (Jacobs Taper)
Machine Tool Arbor Range MT0-MT4
Playbook
1) Service the Chuck, take it apart, clean..., lube and reassemble.
2) Buy some NOS parts on eBay if you can find them plus #1
3) Find another 6A-33 on eBay if yours is broken, plus #1 and maybe #2
4) Replace with a similar but not Original chuck Made in USA
5) Replace with a new chuck - not a Jacobs it is mfr by DNLK
Cost and Country
1) $5 to $49 100% made in USA plus you get your Original Chuck working again...
2) $35 to $80 100% made in USA plus you get your Original Chuck working again...
3) $35 to 150 100% made in USA plus you get your Original Chuck working again...
4) $100 to $500 0% made in USA and usually some plastic is involved
5) $55 100% made in USA - NOT ORIGINAL, have not tested
Tools Used for Rebuild
Tech Articles
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