Ball Bearing Super Chucks
Designed for close tolerance, production drilling on precision equipment
The Jacobs Ball Bearing Super Chuck is specifically engineered for heavy-duty, close tolerance production drilling. It is adaptable to a wide range of production drilling equipment, jig borers, milling machines, lathes and radials. Utilizing a ball thrust bearing to reduce friction in the chuck closing mechanism, it permits the application of more gripping force on drill shanks to maximize drilling torque under the most demanding machining conditions.
Features
- Ball bearing construction maximizes gripping force and drilling
accuracy.
- Jaws center-ground for absolute straightness and alignment.
- Jaws specially treated to ensure extended thread life and
high gripping surface hardness.
- One-piece sleeve eliminates crack between driving teeth often
found in other designs.
- Through-hardened sleeve teeth plus hardened nose and keyholes
provide outstanding wear resistance.
- Fluted sleeve standard.
- Each chuck 100% inspected for performance and precision.
Part # | Model # | Capacity Range |
Mount Jacobs |
Key No. |
|||
Minimum | Maximum | ||||||
in | mm | in | mm | ||||
JAC.8-1/2N | 8-1/2N | 0 * | 0 * | 0.250 | 6.4 | 2JT | K30 |
JAC.11N | 11N | 0 * | 0 * | 0.375 | 10 | 2JT | K32 |
JAC.14N | 14N | 0 * | 0 * | 0.500 | 13 | 3JT | K3 |
JAC.16N | 16N | 0.125 | 3 | 0.625 | 16 | 3JT | K4 |
JAC.18N | 18N | 0.125 | 3 | 0.750 | 19 | 4JT | K4 |
JAC.20N | 20N | 0.375 | 10 | 1.00 | 25.4 | 5JT | K5 |
Plain Bearing Chucks
The O.E.M. standard for accuracy and durability on all types of industrial power and machine tools
The Jacobs Plain Bearing Chuck is the world's most widely used for medium or heavy-duty portable, bench or floor mounted power tools. This industrial quality chuck, with fully hardened and ground working components, offers exceptionally high accuracy, gripping power and durability. Both heavy and medium duty models are available in a wide range of capacities for use on threaded mounts and taper mounted spindles
Features
- Heavy and Medium Duty models for threaded or taper mounting.
- Jaws center-ground for absolute straightness and alignment.
- Jaws specially treated to ensure extended thread life and
high gripping surface hardness.
- One-piece sleeve eliminates crack between driving teeth often
found in other designs.
- Through-hardened sleeve teeth plus hardened nose and keyholes
provide outstanding wear resistance.
- Fluted sleeve standard.
- Each chuck 100% inspected for performance and precision.
Part # | Model # | Capacity Range |
Mount Jacobs |
Key No. |
|||
Minimum | Maximum | ||||||
in | mm | in | mm | ||||
JAC.3A | 3A | 0.125 | 3 | 0.625 | 16 | 3JT | K3 |
JAC.3KD | 3KD (2) | 0.125 | 3 | 0.625 | 16 | 3JT | K3 |
JAC.3PD | 3PD (3) | 0.125 | 3 | 0.625 | 16 | 3JT | K3 |
JAC.34-02 | 34-02 | 0 (1) | 0 | 0.500 | 13 | 2JT | K3 |
JAC.34-06 | 34-06 | 0 (1) | 0 | 0.500 | 13 | 6JT | K3 |
JAC.34-33 | 34-33 | 0 (1) | 0 | 0.500 | 13 | 33JT | K3 |
JAC.34-33C | 34-33C (4) | 0 (1) | 0 | 0.500 | 13 | 33JT | K3C |
JAC.36 | 36 | 0.180 | 5 | 0.800 | 20.3 | 3JT | K4 |
JAC.36KD | 36KD (2) | 0.180 | 5 | 0.800 | 20.3 | 3JT | K4 |
JAC.36PD | 36PD (3) | 0.180 | 5 | 0.800 | 20.3 | 3JT | K4 |
(2) Equipped with positive drive slot.
(3) Equipped with pin-type positive drive.
(4) Equipped with locking collar.
Part # | Model # | Capacity Range |
Mount Jacobs |
Key No. |
|||
Minimum | Maximum | ||||||
in | mm | in | mm | ||||
JAC.0 | 0 | 0 (1) | 0 | 0.156 | 4 | 0JT | K0 |
JAC.1A | 1A | 0 (1) | 0 | 0.250 | 6.5 | 1JT | K1 |
JAC.2A | 2A | 0 (1) | 0 | 0.375 | 10 | 2JT | K2 |
JAC.31-01 | 31-01 | 0 (1) | 0 | 0.375 | 10 | 1JT | K30 |
JAC.31-02 | 31-02 | 0 (1) | 0 | 0.375 | 10 | 2JT | K30 |
JAC.33 | 33 | 0.08 | 2 | 0.500 | 13 | 33JT | K32 |
JAC.3326A | 3326A(4) | 0.08 | 2 | 0.500 | 13 | 33JT | K32 |
JAC.33KD | 33KD (3) | 0.08 | 2 | 0.500 | 13 | 33JT | K32 |
(2) Equipped with positive drive slot.
(3) Equipped with pin-type positive drive.
(4) Equipped with locking collar.
link to arbor page
Part # | Model # | Capacity Range |
Mount Thread Jacobs |
Key No. |
|||
Minimum | Maximum | ||||||
in | mm | in | mm | ||||
JAC.3B-5/8 | 3B 5/8 | 0.125 | 3 | 0.625 | 16 | 5/8-16 | K3 |
JAC.7BA-3/8 | 7BA 3/8 | 0 (1) | 0 | 0.250 | 6.5 | 3/8-24 | K7 |
JAC.32BA-1/2 | 32BA 1/2 | 0 (1) | 0 | 0.375 | 10 | 1/2-20 | K32 |
JAC.35B-1/2 | 35B 1/2 | 0.156 | 4 | 0.625 | 16 | 1/2-20 | K3 |
JAC.36B-3/4 | 36B 3/4 | 0.188 | 5 | 0.800 | 20.3 | 3/4-16 | K4 |
JAC.36B-5/8 | 36B 5/8 | 0.188 | 5 | 0.800 | 20.3 | 5/8-16 | K4 |
Part # | Model # | Capacity Range |
Mount Thread Jacobs |
Key No. |
|||
Minimum | Maximum | ||||||
in | mm | in | mm | ||||
JAC.0B-5/16 | 0B 5/16 | 0 (2) | 0 | 0.156 | 4 | 5/16-24 | K0 |
JAC.1B-3/8 | 1B 3/8 | 0 (1) | 0 | 0.250 | 6.5 | 3/8-24 | K1 |
JAC.2BA-3/8 | 2BA 3/8 | 0 (1) | 0 | 0.375 | 10 | 3/8-24 | K2 |
JAC.31BA-1/2 | 31BA 1/2 | 0 (1) | 0 | 0.375 | 10 | 1/2-20 | K30 |
JAC.31BA-3/8-S | 31BA 3/8-S | 0 (1) | 0 | 0.375 | 10 | 3/8-24 | K30 |
JAC.31BA-3/8-F | 31BA 3/8-F | 0 (1) | 0 | 0.375 | 10 | 3/8-24 | K30 |
JAC.33BA-1/2 | 33BA 1/2 | 0.08 | 2 | 0.500 | 13 | 1/2-20 | K32 |
JAC.33BA-3/8 | 33BA 3/8 | 0.08 | 2 | 0.500 | 13 | 3/8-24 | K32 |
JAC.33BA-5/8 | 33BA 5/8-16 | 0.08 | 2 | 0.500 | 13 | 5/8-16 | K32 |
(2) Model 0B 5/16 has a minimum capacity of a No. 80 (.0135in/.344mm) drill
Stainless steel chucks
- Special application on either portable air operated or stationary machine tools
- Resist Chemical corrosion and reduce potential for hazardous sparking
Part # | Model # | Capacity Range |
Mount Jacobs |
Key No. |
||||
Minimum | Maximum | |||||||
in | mm | in | mm | |||||
JAC.0M | 0BM | 0 | 0 | 0.156 | 4 | 0JT | K0M | |
JAC.0BM-5/16 | 0BM 5/16 | 0 | 0 | 0.156 | 4 | 5/16-24 | K0M | |
JAC.1M | 1M | 0 | 0 | 0.250 | 6 | 1JT | K1M | |
JAC.1BM-5/16 | 1BM 5/16 | 0 | 0 | 0.250 | 6 | 5/16-24 | K1M | |
JAC.1BM-3/8 | 1BM 3/8 | 0 | 0 | 0.250 | 6 | 3/8-24 | K1M |