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R8 Taper to Jacobs Taper Drill Chuck Arbors
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Adapt machines with R8 taper spindles to mount Jacobs taper drill chucks. These arbors are made of hardened steel and are precision ground for accuracy. They thread onto your machine’s drawbar for a secure connection. Strike the top of the arbor to seat them onto a drill chuck. To separate them, use a drill chuck removal tool.
Economy—Economy arbors are great for occasional or low-volume jobs.
Industrial—Industrial arbors are harder and more wear resistant than Economy arbors.
For Drill Chuck Taper No. | Overall Lg. | Material | Hardness | Each | |||
|---|---|---|---|---|---|---|---|
Economy | |||||||
| Jacobs 1 | 4 13/16" | Hardened Steel | Rockwell C28 (Hard) | 8775A16 | 000000 | ||
| Jacobs 2, Jacobs 2s | 5 3/64" | Hardened Steel | Rockwell C28 (Hard) | 8775A17 | 00000 | ||
| Jacobs 3 | 5 25/64" | Hardened Steel | Rockwell C28 (Hard) | 8775A21 | 00000 | ||
| Jacobs 4 | 5 27/32" | Hardened Steel | Rockwell C28 (Hard) | 8775A22 | 00000 | ||
| Jacobs 6 | 5 25/64" | Hardened Steel | Rockwell C28 (Hard) | 8775A19 | 00000 | ||
| Jacobs 33 | 5 13/64" | Hardened Steel | Rockwell C28 (Hard) | 8775A18 | 00000 | ||
Industrial | |||||||
| Jacobs 1 | 4 53/64" | Hardened Steel | Rockwell C55 (Extra Hard) | 8775A11 | 00000 | ||
| Jacobs 2, Jacobs 2s | 5 5/64" | Hardened Steel | Rockwell C55 (Extra Hard) | 8775A12 | 00000 | ||
| Jacobs 3 | 5 27/64" | Hardened Steel | Rockwell C55 (Extra Hard) | 8775A13 | 00000 | ||
| Jacobs 6 | 5 15/64" | Hardened Steel | Rockwell C55 (Extra Hard) | 8775A14 | 00000 | ||
| Jacobs 33 | 5 15/64" | Hardened Steel | Rockwell C55 (Extra Hard) | 8775A15 | 00000 | ||
