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NMTB Taper to Jacobs Taper Drill Chuck Arbors
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Adapt machines with NMTB taper spindles to mount Jacobs taper drill chucks. These arbors are made of hardened steel to resist wear. Their shank is precision ground to the industry standard AT3 tolerance for a secure fit that minimizes runout in your machine spindle. Internal threads in the shank connect to your machine's drawbar. These arbors meet ASME standards for compatibility across machines with NMTB spindles. They're also compatible with older Erickson quick-change spindles.
Strike the top of the arbor to seat them onto a drill chuck. To separate them, use a drill chuck removal tool.
Machine Taper No. | For Drill Chuck Taper No. | Overall Lg. | Projection | Material | Specs. Met | Each | |||
|---|---|---|---|---|---|---|---|---|---|
| NMTB 30 | Jacobs 3 | 5 13/32" | 1 1/2" | Hardened Steel | ASME B5.18 | 9257N11 | 000000 | ||
| NMTB 30 | Jacobs 6 | 5 5/32" | 1 1/2" | Hardened Steel | ASME B5.18 | 9257N13 | 00000 | ||
| NMTB 30 | Jacobs 33 | 5 5/32" | 1 1/2" | Hardened Steel | ASME B5.18 | 9257N12 | 00000 | ||
| NMTB 40 | Jacobs 2, Jacobs 2s | 6 1/16" | 1 1/2" | Hardened Steel | ASME B5.18 | 9257N14 | 00000 | ||
| NMTB 40 | Jacobs 3 | 6 3/8" | 1 1/2" | Hardened Steel | ASME B5.18 | 9257N15 | 00000 | ||
| NMTB 40 | Jacobs 6 | 6 5/32" | 1 1/2" | Hardened Steel | ASME B5.18 | 9257N16 | 00000 | ||
| NMTB 40 | Jacobs 33 | 6 3/16" | 1 1/2" | Hardened Steel | ASME B5.18 | 9257N17 | 00000 | ||
| NMTB 50 | Jacobs 3 | 8 3/16" | 2" | Hardened Steel | ASME B5.18 | 9257N18 | 000000 | ||
| NMTB 50 | Jacobs 4 | 8 5/8" | 2" | Hardened Steel | ASME B5.18 | 9257N19 | 000000 | ||
| NMTB 50 | Jacobs 5 | 8 27/32" | 2" | Hardened Steel | ASME B5.18 | 9257N21 | 000000 | ||
