Pre-purchase check
dth drilling rig manufacturers
This page is a specification check before inquiry. DTH and rotary are different hole-making methods. They are not interchangeable on a quote without air volume, air pressure and tooling written down. This is not a quotation and not an inspection report.
Verify DTH versus rotary before you accept an alternative model
The same model family can ship with a rotary head, a DTH hammer, or both. Hole diameter without drilling depth, and free air delivery without discharge pressure, are incomplete ratings. Ask the buyer to supply formation, expected hole diameter, target depth, and whether the compressor travels with the carrier. Operating environment inputs — altitude, ambient temperature, pad bearing and available air or hydraulic power — must be on the brief before a supplier can confirm the rating. If a factory offers a substitute, require the method, hammer size, air pair, mast height and tooling list in writing against the signed sheet.
Before the order
- Exact model and configuration list, including DTH or rotary method
- Hole diameter with drilling depth as the capacity basis
- Compressor free air delivery with discharge pressure, or rotary torque
- Required documents by model: test record, parts manual, packing list
Before the balance payment
- Nameplate and serial photographs on the same unit
- Test or trial-run record against the signed method and air pair
- Packing and loading record, including mast lay-down
Impact energy and blow rate belong on DTH or hammer descriptions; they do not replace the air-volume and pressure pair. Auxiliary hydraulic flow and system relief pressure belong on hydraulic rotary descriptions. Emission stage follows the engine and the destination. Continue with inquiry options or the checklist article.
Duty
Formation and hole use
Configuration
DTH or rotary
Quantity
Units and bits
Delivery
Destination window