Extra-Grip Jacobs Taper-Mount Keyless Drill Chucks
Use the included spanner wrench to tighten the chuck for up to three times the gripping torque of hand tightening. These chucks grip tighter as torque increases, which prevents tool-shank slippage and allows for precise drilling. They require an arbor (sold separately).
For Bit Shank Size | Jacobs Taper | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Inch | mm | Number | Drive Type | Body Material | Jaw Material | Max. No-Load Speed, rpm | Manufacturer Model Number | Each | |
Jacobs | |||||||||
| 0"-0.255" | 0-6.5 | 1 | Standard | Steel | Steel | 10,000 | JKT 65-J1 | 28305A59 | 0000000 |
| 0.039"-0.512" | 1-13 | 2 | Standard | Steel | Steel | 7,000 | JKT 130-J2 | 28305A62 | 000000 |
| 0.039"-0.512" | 1-13 | 6 | Standard | Steel | Steel | 7,000 | JKT 130-J6 | 28305A64 | 000000 |
| 0.039"-0.512" | 1-13 | 33 | Standard | Steel | Steel | 7,000 | JKT 130-J33 | 28305A63 | 000000 |
| 0.118"-0.63" | 3-16 | 6 | Standard | Steel | Steel | 4,000 | JKT 160-J6 | 28305A65 | 000000 |
Drill Chucks with NMTB Taper Integral Arbor
Limit runout and slippage under heavy cutting forces from manual mills and older CNC mills. These chucks have an integrated arbor for a one-piece design that makes them more accurate and compact than chucks with a separate arbor. Made of hardened steel, they resist wear from repeated use. Their shank is precision ground to the industry standard AT3 tolerance for a tight fit in your spindle. They meet ANSI standards for compatibility across machines with NMTB spindles. They're also compatible with older Erickson quick-change spindles. Internal threads in the shank connect to your machine's drawbar.
Twist the sleeve by hand to swap bits out quickly. The grip on the bit tightens as torque increases.
To maximize grip and minimize runout, choose a chuck where your drill bit diameter falls in the middle of the bit shank size range.
For Bit Shank Size | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Shank Type | Inch | mm | Max. No-Load Speed, rpm | TIR (Total Indicated Runout) Accuracy | Jaw Material | Body Material | Projection | Max. Body Dia. | For Tool Drive Direction | Features | Specifications Met | Each | |
Keyless | |||||||||||||
| NMTB 40 Taper | 0"-5/16" | 0-8 | 7,000 | 0.0005" | Hardened Steel | Hardened Steel | 3" | 2.5" | Clockwise | Wrench Flats | ANSI B5.18 | 9985N11 | 0000000 |
| NMTB 40 Taper | 1/32"-1/2" | 1-13 | 5,000 | 0.0005" | Hardened Steel | Hardened Steel | 3 3/8" | 2.5" | Clockwise | Wrench Flats | ANSI B5.18 | 9985N12 | 000000 |