Quarry blast-hole tooling review
Compare DTH and top-hammer tooling from the actual drilling system—not from hole diameter alone. Start with the existing rig or drifter, planned hole, bench and rock conditions, available air or flushing, and the interfaces already in use.
Tooling route first. Final interfaces, operating values and supply scope are confirmed in the written quotation.
Start With the Existing Drilling System
A useful review begins with the equipment and interfaces already controlling the job. Send what is known and mark the rest as unknown rather than filling gaps with a similar model name.
Rig or drifter
Identify the rig, drifter, rotary head or existing hammer. Include nameplates, markings and interface photos where available.
Hole plan
State required diameter, depth, inclination and straightness. These are review inputs, not a universal rule for choosing DTH or top hammer.
Bench and free face
Show the bench, access, front-row or free-face context and the working position of the current machine.
Rock and ground
Describe abrasivity, fractures, soft-hard changes, water and overburden. Photos and previous bit wear can make the description more useful.
Air, flushing and returns
Record the available system, stated operating conditions and how cuttings are returned. Do not report only a compressor nameplate without the site arrangement.
DTH or Top Hammer: Choose a Path, Not a Shortcut
The first decision is which existing drilling architecture must be continued or reviewed. Hole diameter contributes to that decision, but it does not replace the rig, energy-transfer, flushing and interface evidence.
Start at the air and rotation system
Review the rig rotation and feed, pipe-side connection, hammer identity, exact bit shank and foot-valve requirement, then confirm flushing and cuttings return.
Start at the drifter and shank adapter
Review the exact shank adapter, rod and coupling, the same confirmed thread system, bit and flushing path. A T38 or T45 label alone is not a complete string match.
For the detailed decision dimensions, use the DTH vs top-hammer guide for 76–115 mm quarry blast holes.
Check the Complete Tool Chain
DTH chain
Air system → rig rotation and feed → pipe interface → hammer → exact bit shank and foot valve → flushing and returns.
The current CIR90 hammer page and 76 mm API 2-3/8 REG pipe page are separate inquiry starting points. Their published interface identities differ; do not combine them without a controlled alternate top-sub or crossover drawing.
Top-hammer chain
Drifter → exact shank adapter → rod and coupling → confirmed thread-system bit → flushing.
Thread-family names organize inquiry pages. They do not prove that the existing shank adapter, rod ends, coupling and bit form one approved drill string.
What Changes the Selection
Rock abrasivity, fractures, mixed layers, water, hole-deviation limits, front-row conditions, the buyer’s installed interfaces and the air or flushing available at the work area can all change what must be checked. Treat any operating value not supported by the exact machine and interface record as requiring technical review.
Current PerfoMax Tooling Paths
DTH Tools
Explore the current DTH tooling family. Confirm the hammer, bit shank, pipe connection and operating conditions.
Low-Pressure DTH Hammers
Review currently published low-pressure hammer inquiry pages. Do not use this path for high-pressure assumptions.
DTH Drill Bits
Start from the required hammer shank, hole and rock conditions; confirm shank, foot valve, diameter and face design.
Top Hammer Drill Rods
Confirm the drifter, shank adapter, thread, coupling, bit and flushing before quotation.
Representative Inquiry Starting Points
These are current product inquiry pages, not a pre-confirmed package. Open the item that matches the evidence you can provide, then confirm every mating interface in writing.
When This Page Is Not Enough
Blast pattern, burden and spacing, explosives, delay, misfire control, danger zones, rig suitability, compressor design and production guarantees require the responsible site engineer, machine documentation or another qualified party. This page prepares a tooling inquiry; it does not approve a quarry operation.
Use the Technical Guides for the Detailed Check
Send the Quarry Inputs for Review
Include the quarry task, current drilling method, rig or drifter identity, hole diameter/depth/inclination, bench and free-face context, rock and water conditions, air or flushing arrangement, every visible pipe/thread/shank/hammer/rod/coupling/bit marking, quantity, destination and inspection or packing needs. Add photos, drawings and used-tool evidence where available. Unknown fields are acceptable; they will be treated as identification work rather than as confirmed compatibility.