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Key Type Precision Chucks:
Taper and Threaded Mount

Plain bearing models precision crafted. Heavy duty performance.
All parts are hardened for maximum tool life.

FAQ: What's the Chuck Taper?
Taper Mount

Model
Drill Cap., in.
Mount
Sleeve
Dia., in.
Weight, oz.
Jacobs
Equivalent
80-0A
0-5/32
0JT
0.860
2
OA
81-1A
0-1/4
1JT
1.18
4
1A
81-4A
0-1/4
1JT
1.26
5
--
81B-13A
0-5/16
2SH JT
1.42
8
--
82-2A
0-3/8
2JT
1.67
12
2A
43B-5A
1/16-1/2
33JT
1.77
15
33
43-6A
0-1/2
2JT
2.01
21
34-02
43-6A
0-1/2
33JT
2.01
20
34-33
43-6A
0-1/2
6JT
2.01
20
34-06
84-6A
0-5/8
3JT
2.36
33
3A
45-6A
3/16-3/4
3JT
2.36
32
36
85-9A
1/16-3/4
4JT
2.95
71
--
85B-9A
3/16-1-1/32
4JT
2.95
69
--

Threaded Mount

Model
Drill Cap.
Mount
Sleeve Dia.
Weight, oz.
Jacobs Equivalent
81-1B
0-1/4
3/8-24
1.18
4
1B-3/8
81-1B
0-1/4
5/16-24
1.18
4
--
81-4B
0-1/4
3/8-24
1.26
5
--
81B-13B
0-5/16
3/8-24
1.42
8
--
81B-13B
0-5/16
1/2-20
1.42
8
--
42-13B
0-3/8
3/8-24
1.42
8
31BA-3/8
42-13B
0-3/8
1/2-20
1.42
8
31BA-1/2
82-2B
0-3/8
3/8-24
1.67
13
2BA-3/8
82B-5B
0-3/8
1/20-20
1.77
15
32BA-1/2
43B-5B
1/16-1/2
3/8-24
1.77
15
33BA-3/8
43B-5B
1/16-1/2
1/2-20
1.77
15
33BA-1/2
43B-5B
1/16-1/2
5/8-16
1.77
16
33BA-5/8
43-6B
0-1/2
1/2-20
2.01
21
--
43-6B
0-1/2
5/8-16
2.01
21
--
84-6B
0-5/8
5/8-16
2.36
35
3B-5/8
45-6B
3/16-3/4
5/8-16
2.36
33
36B-5/8
45-6B
3/16-3/4
3/4-16
2.36
33
36B-3/4