Rotary torque · kelly depth · compressor free air delivery · percussion energy · Tier 4 / Stage V logs — the measurable inputs equipment managers use to shortlist Atlas Copco platforms.
Four headline metrics from recent factory and field validation campaigns. Each card links to a downloadable selection worksheet. Torque figures are measured on the instrumented rotary head; FAD is verified on the compressor test stand after cooler and filter conditioning so published numbers match what arrives on site.
Method notes: rotary drilling torque curves are generated under controlled crowd force; undercarriage ground pressure is calculated from track shoe width and operating weight for soft-pad reviews; ISO 8178 C1 cycle data accompanies every Tier 4 Final / Stage V power pack serial.
Preferred when pile penetration depth exceeds shallow sockets and spoil control matters on urban pads. Higher rotary drilling torque and interlocking kelly strings deliver diameter accuracy; cycle time is slower in competent rock than a well-tuned DTH string.
Preferred for hard rock when flushing air and percussion energy dominate penetration. Requires honest free-air-delivery sizing after altitude derate; underpowered compressors waste bits and stall patterns. Less ideal where casing and spoil containment drive foundation specs.
When the same foundation pad alternates soft cut with paved access roads, buyers debate crawler drill carriers against wheeled excavator-assist packages. Atlas Copco applications notes present both sides without forcing a single SKU.
Lower ground pressure (typically 40–55 kPa class with wide track shoe width) suits soft pads and deep kelly crowd loads. Stability under high rotary drilling torque is stronger for 55–80 m pile programs; road moves still need a lowboy.
Self-propelled road travel cuts float cost on urban multi-pad jobs. Better when excavation and drainage trench work dominate the week and drill hours are intermittent; not a substitute when continuous high-torque rotary crowd is the critical path.
Published torque and FAD charts assume the envelopes below. Outside these boundaries, applications engineering must re-rate the package before quotation — we do not treat brochure peaks as site-ready guarantees.
All new rotary platforms shipped with documented DPF + SCR aftertreatment.
Compressor and drill engines aligned to Stage V with serial-level NOx/PM logs.
Friction and tooling tables published for deep bored-pile programs.
Percussion hours and compressor temperature envelopes streamed to fleet offices.
37-hour advance warning integrated into parts auto-dispatch.
Single worksheet covers torque, depth, FAD and emissions compliance.
Torque curves, FAD worksheets and emissions templates — request the PDF bundle and our applications engineer will annotate it for your geology.
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