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Drill Chuck Mount Type
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Jacobs Taper Drive Type
For Tool Drive Direction
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Corrosion-Resistant Thread-Mount Keyed Drill Chucks
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Threaded Mount |
Even when exposed to moisture and chemicals, these stainless steel chucks maintain smooth, precise operation. They’re keyed, so their jaw locks securely around bits—use the included key to tighten and loosen their hold. Thanks to their grip, they’re great for high-torque, low-speed drilling in hard materials. Mount them to the threaded spindles of handheld drills. For machines without spindles, mount them to a threaded drill chuck arbor.
A through hole allows long bits to pass through without hitting the back of the chuck. They can also be used on an electrical discharge machine to hold electrodes and let fluid pass through.
To maximize grip and minimize runout, choose a chuck where your drill bit diameter falls in the middle of the bit shank size range.
Jacobs—Jacobs chucks are the most widely used drill chucks. They don’t contain lubricant, so they won’t contaminate your work area or accumulate dust. They’re great for sensitive areas, such as medical environments.
Chuck Key | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mounting Hole Thread Size | For Bit Shank Size | Duty Rating | Wt., lb. | Total Indicated Runout (TIR) Accuracy | Included | No. | Jaw Material | Body Material | For Use With | For Tool Drive Direction | Lubrication | Features | Mfr. Model No. | Each | |||
Jacobs—Plain Bearing | |||||||||||||||||
Keyed Chuck | |||||||||||||||||
| 5/16"-24 | 0.028" to 5/32" 0.7 mm to 4 mm | Medium | 0.2 | 0.007" | Yes | K0M | Stainless Steel | Stainless Steel | Drill Presses Electrical Discharge Machines Handheld Power Drills Lathes | Clockwise, Counterclockwise | Not Required | Through Hole | 0BM 5/16 | 3166A13 | 0000000 | ||
| 5/16"-24 | 0.028" to 1/4" 0.7 mm to 6.5 mm | Medium | 0.3 | 0.007" | Yes | K1M | Stainless Steel | Stainless Steel | Drill Presses Electrical Discharge Machines Handheld Power Drills Lathes | Clockwise, Counterclockwise | Not Required | Through Hole | 1BM 5/16 | 3166A19 | 000000 | ||
| 3/8"-24 | 0.028" to 1/4" 0.7 mm to 6.5 mm | Medium | 0.3 | 0.007" | Yes | K1M | Stainless Steel | Stainless Steel | Drill Presses Electrical Discharge Machines Handheld Power Drills Lathes | Clockwise, Counterclockwise | Not Required | Through Hole | 1BM 3/8 | 3166A17 | 000000 | ||
Corrosion-Resistant Taper-Mount Keyed Drill Chucks
 |  |
Jacobs Taper Mount |
Made of stainless steel, these chucks maintain smooth, precise operation even when exposed to moisture and chemicals. They’re keyed, so their jaw locks securely around bits—use the included key to tighten and loosen their hold. Thanks to their grip, they’re great for high-torque, low-speed drilling in hard materials. Mount them to Jacobs taper arbors on equipment ranging from handheld drills to drill presses.
A through hole allows long bits to pass through without hitting the back of the chuck. They can also be used on an electrical discharge machine to hold electrodes and let fluid pass through.
To maximize grip and minimize runout, choose a chuck where your drill bit diameter falls in the middle of the bit shank size range.
Jacobs—Jacobs chucks are the most widely used drill chucks. They don’t contain lubricant, so they won’t contaminate your work area or accumulate dust. They’re great for sensitive areas, such as medical environments.
Chuck Key | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Machine Taper No. | For Bit Shank Size | Total Indicated Runout (TIR) Accuracy | Included | No. | Jaw Material | Body Material | For Use With | For Tool Drive Direction | Performance | Lubrication | Mfr. Model No. | Each | |||
Jacobs—Plain Bearing | |||||||||||||||
| Jacobs 0 | 0.028" to 5/32" 0.7 mm to 4 mm | 0.007" | Yes | K0M | Stainless Steel | Stainless Steel | Drill Presses Electrical Discharge Machines Handheld Power Drills Lathes Milling Machines | Clockwise, Counterclockwise | Corrosion Resistant, Dry Running | Not Required | 0M | 3166A11 | 0000000 | ||
| Jacobs 1 | 0.028" to 1/4" 0.7 mm to 6.5 mm | 0.007" | Yes | K1M | Stainless Steel | Stainless Steel | Drill Presses Electrical Discharge Machines Handheld Power Drills Lathes Milling Machines | Clockwise, Counterclockwise | Corrosion Resistant, Dry Running | Not Required | 1M | 3166A14 | 000000 | ||
