Rotary Head
AssemblyGear-driven top drive travelling on the mast rails that rotates the string at 0–160 rpm and passes bailing air through its swivel. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Bill of materials for Rotary Head
7 top-level lines as of r145032| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Head Drive Motor | rotary-blasthole-drill-head-motor | 2× | 2 | · | part |
| 2 | Gearbox Housing | gearbox-housing | 1× | 1 | · | part |
| 3 | Helical Gear Pair | gear-pair | 2× | 2 | · | part |
| 4 | Air Swivel | rotary-blasthole-drill-air-swivel | 1× | 1 | · | part |
| 5 | Head Spindle | rotary-blasthole-drill-spindle | 1× | 1 | · | part |
| 6 | Ball Bearing | ball-bearing | 4× | 4 | · | part |
| 7 | Oil Seal | oil-seal | 2× | 2 | · | part |