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Precision Low-Backlash Boring Heads
Precision boring heads with controlled dovetail fit, low backlash, and H6-tolerance boring bar mounting bores for repeatable adjustment and accurate bar location.
Key Features
- Low-backlash fine adjustment: adjustment backlash controlled to 3 dial graduations or less.
- Precision dovetail fit: fit tolerance controlled to less than 0.03 mm.
- H6-tolerance boring bar mounting bores: accurate bar location and high concentricity.
- Hardened and ground adjusting screw: smooth adjustment and long service life.
- Wide bearing surface maintains rigidity during offset boring.
- Available in 2", 3", and 4" head diameters.


Specifications
| Item | Head Diameter (D) |
Overall Height (L) |
Boring Bar Mounting Bore (d) |
Hole Center Distance | Cross Hole Dia. (d) |
Offset | Net Weight | Mount Thread |
|---|---|---|---|---|---|---|---|---|
| 0350-0002 | 2" | 2-1/2" | 1/2" | 5/8" | 1/2" | 5/8" | 1.55 lb | 7/8"-20 |
| 0350-0003 | 3" | 3-5/32" | 3/4" | 15/16" | 3/4" | 1" | 4.4 lb | 1-1/2"-18 |
| 0350-0004 | 4" | 3-43/64" | 1" | 1-1/4" | 1" | 1" | 8.8 lb | 1-1/2"-18 |
All dimensions are in inches unless noted. Net weights are approximate.










































