The Foredom H.MH-120 is an adjustable Jacobs chuck microgrinder handpiece designed for precision rotary work. Featuring a geared 3-jaw Jacobs chuck — the same style found on the popular Foredom #30 handpiece — it accepts a wide range of bits and burs from 0 to 4.0 mm (5/32") in diameter, closing all the way down to zero for maximum versatility. This handpiece plugs directly into the Foredom HP4-917 Control Box (sold separately) and is operated via the control box dial or an optional variable speed foot control.
Compared to the standard Foredom micromotor handpiece, the H.MH-120 delivers more torque while operating at a lower maximum speed of 20,000 RPM—making it well suited for heavier grinding and material removal tasks that benefit from added power over raw speed.
| Chuck Type | Adjustable Jacobs 3-jaw chuck |
|---|---|
| Chuck Capacity | 0–4.0 mm (0–5/32") |
| Maximum Speed | 20,000 RPM |
| Handpiece Length | 8-3/32" (206 mm) |
| Handpiece Diameter (cord end) | 1-3/8" (35 mm) |
| Handpiece Diameter (chuck end) | 1-1/64" (26 mm) |
| Weight | 1 lb 2 oz (510 g) |
| Compatible Control Box | Foredom HP4-917 (sold separately) |
This listing is for the microgrinder handpiece only. The Foredom HP4-917 Control Box is required for operation and is sold separately. This handpiece is not a standalone unit.
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