PERFOMAX TECHNICAL GUIDES
Technical guides for selecting, operating, troubleshooting and sourcing rock drilling equipment. Browse by drilling system or by the task you need to complete.
222 published technical guides
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APPLICATIONS
Compare DTH and top-hammer drilling for 76–115 mm quarry blast holes by depth, straightness, rock structure, air system, rig compatibility and cost per acceptable...
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OPERATION & TROUBLESHOOTING
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01
Air-leg and hand-held rock drills, compressed-air supply, feed, flushing and model compatibility.
35 technical guides
FUNDAMENTALS
Understand how a pneumatic rock drill’s valve, piston, rifle-bar rotation, chuck, lubrication, feed, and flushing paths work—and what buyers must confirm.
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SELECTION
A buyer-focused framework for matching an air-leg or jackleg rock drill to the hole, rock, compressed-air system, working position, drill steel and support requirements.
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SELECTION
Compare YT24 and YT28 air-leg rock drills by exact YT24 suffix, hole range, H22 × 108 shank, hose size and pressure-dependent air demand before...
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SELECTION
How to size compressed-air supply for a YT28 rock drill using rated air consumption, tool-inlet pressure, hose loss and simultaneous drill demand—with practical 1–3...
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OPERATION & TROUBLESHOOTING
Field troubleshooting guide for YT28 air-leg rock drills with slow drilling, weak impact or rotation, or hard starting. Diagnose tool-inlet air supply, lubrication, water...
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BUYING & QUALITY
A buyer-focused RFQ checklist for air-leg pneumatic rock drills covering model, H22 shank, compressor demand, pusher-leg pairing, flushing, spares and quote normalization.
Read guide02
DTH hammers, bits and drill pipes as one compressed-air drilling system.
59 technical guides
FUNDAMENTALS
Understand DTH hammer anatomy, including the piston, backhead, check valve, chuck, bit shank, air cycle and foot-valve terminology used in technical discussions.
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APPLICATIONS
A practical guide to DTH drilling in hard abrasive rock: how rotation, feed, flushing, bit geometry and wear monitoring affect penetration, bit life and...
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SELECTION
Compare 4-inch and 5-inch DTH hammers by hole diameter, compressor flow and pressure, bit shank, top-sub thread and drill pipe, with CIR90/CIR110 examples.
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SELECTION
How should you choose DTH drill pipe diameter? This guide explains how pipe OD, hole size, hammer connection and compressor air flow work together,...
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OPERATION & TROUBLESHOOTING
A practical DTH hammer troubleshooting guide for low penetration, no impact, overheating, poor flushing, and premature wear—plus a pre-replacement RFQ checklist.
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BUYING & QUALITY
A buyer-focused DTH drill bit RFQ checklist covering hammer and shank identity, diameter, face, buttons, flushing, foot-valve design, quantity, and approval evidence.
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Threaded drill strings, rods, couplings, shank adapters, bits and drilling performance.
40 technical guides
FUNDAMENTALS
A practical guide to top hammer drill string components: what the shank adapter, rods, couplings and bit do, and how percussion, rotation and flushing...
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APPLICATIONS
Practical guide to top hammer drilling in hard abrasive rock: manage bit wear, flushing, drill-string condition and setup before changing thread systems.
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SELECTION
A buyer-focused guide to choosing T38 or T45 top-hammer drill rods by rig compatibility, hole range, drill-string architecture, rod length and RFQ requirements.
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SELECTION
Top hammer shank adapter compatibility guide: match the exact rock drill model, machine-side interface, R32/T38/T45 rod thread and flushing before ordering.
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OPERATION & TROUBLESHOOTING
A practical guide to top hammer drill rod breakage, bending, thread wear and fatigue, with failure-pattern diagnosis, inspection steps and an RFQ checklist.
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BUYING & QUALITY
A buyer-focused pre-shipment inspection guide for top hammer drill rods covering ordered identity, thread condition, straightness, dimensions, surface checks, traceability evidence and packing controls.
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H22 × 108 mm drill steel, taper angles, rod lengths and compatible bits.
18 technical guides
SELECTION
A buyer-focused guide to choosing button, cross or chisel tapered bits for H22 drill rods by connection, taper angle, rock condition and field economics.
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SELECTION
A practical H22 compatibility guide for 7°, 11° and 12° tapered drill rods and bits. Learn what the angles mean, why they must match,...
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SELECTION
Choose the right H22 × 108 mm, 11° tapered drill rod length from PerfoMax’s current 600–2400 mm inquiry options. This guide explains what “108...
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SELECTION
Choose H22 tapered button bit diameter from 30–40 mm by target hole size, rock-drill range, taper angle and rod compatibility before ordering.
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SELECTION
Practical H22 × 108 drill steel compatibility guide: separate the rock-drill shank from rod length and bit taper, then verify the full tapered drilling...
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Pneumatic breakers and picks for concrete and rock breaking.
20 technical guides
SELECTION
A practical B2B guide to choosing a pneumatic breaker by job severity, tool weight, compressed-air supply, chisel interface and working position, with PerfoMax model...
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Rock mechanics, drilling principles, performance metrics and B2B buying decisions across drilling systems.
43 technical guides
FUNDAMENTALS
A practical explanation of the four core processes in percussive rock drilling—percussion, rotation, feed and flushing—and how they work together in top hammer and...
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FUNDAMENTALS
A practical guide to UCS in rock drilling: what MPa measures, how UCS relates to penetration rate, what it cannot predict, and what buyers...
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APPLICATIONS
Compare DTH and top-hammer drilling for 76–115 mm quarry blast holes by depth, straightness, rock structure, air system, rig compatibility and cost per acceptable...
Read guide
FUNDAMENTALS
Hard rock is not automatically abrasive rock. Learn how strength, hardness, abrasivity and drillability affect penetration, carbide wear and drilling-tool life.
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BUYING & QUALITY
A practical B2B guide to rock drilling tool cost per meter. Learn how to compare suppliers using tool life, penetration rate, downtime and controlled...
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BUYING & QUALITY
A practical supplier-qualification checklist for rock drilling tools: verify scope, certificates, process capability, traceability, sample trials, change control and bulk-order release evidence.
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