DTH Hammer and Bit Connections: A Buyer’s Checklist
RigSpan procurement worksheet · 17 October 2026

Project / buyer:
Country / site:
Date / revision:
Supplier / offer reference:


Bit shank
Buyer information: Exact designation and drawing
Confirmation requested: Approved match to the named hammer variant
Response / document reference:
Open questions / owner / due date:

Bit diameter
Buyer information: Required diameter and application
Confirmation requested: Available configuration and dimensional reference
Response / document reference:
Open questions / owner / due date:

Backhead
Buyer information: Thread form, size and drawing
Confirmation requested: Compatibility with rod or adapter
Response / document reference:
Open questions / owner / due date:

Internal arrangement
Buyer information: Model suffix and manual
Confirmation requested: Correct tube/valve arrangement and replacement parts
Response / document reference:
Open questions / owner / due date:

Air supply
Buyer information: Compressor proposal and operating conditions
Confirmation requested: Model-specific requirements and limitations
Response / document reference:
Open questions / owner / due date:

Accepted configuration / revision:
Included equipment:
Exclusions:
Unresolved items:

This worksheet structures an enquiry; it does not certify technical suitability or replace project approval.
https://rigspan.com/guides/dth-hammer-bit-connection-checklist.html