4HR
April 10, 2017
5DH
April 10, 2017
4HRSD4
DOWN HOLE HAMMERS
SPECS
| Description | English | Metric |
|---|---|---|
| Outside Diameter | 3.82″ | 97mm |
| Minimum Bit Size | 4.33″ | 110mm |
| Spanner Flat Size | 2.5″ | 64mm |
| Length (Less Bit) | 38.1″ | 968mm |
| Bit Shank Type | SD4/3415 | SD4/3415 |
| Backhead Thread | 23/8” API Reg Pin | 23/8” API Reg Pin |
| Piston Weight | 16.3lbs | 7.4kg |
| Wear Sleeve Discard Limit | 3.425″ | 87mm |
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