Service & Support
Service requests
Repair request
Give the model and serial number and an engineer will contact you
Request ›Service status
Send your ticket or serial number to check progress
Check ›Machine information
How model names work; send a serial number for the build specification
Look up ›After-sales policy
Warranty scope, wear parts and how to order parts
View ›Genuine parts
Genuine and aftermarket parts differ in life, warranty and the risk of airend damage. Buy through KayDrill channels to avoid failures caused by non-genuine parts.
Parts & service lookup
Enter a model to see the parts and quantities for the 500 / 1500 / 2500 h services
Service network
China: Shanghai office · Quzhou plant · Chengdu service centre. Overseas: sales & service centres in 18 countries.
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FAQ
How do I work out what size of compressor I need?
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You need two numbers: air flow (m³/min) and pressure (bar). Pressure is the sum of the hammer's working pressure, hole depth, water in the hole and hose losses. Air flow is the larger of the hammer's rated air consumption and the air needed to clear cuttings, corrected for rock, depth, temperature and altitude. Or use the selection wizard on this site — answer six questions and get recommended models.
Does a bigger hammer need higher pressure?
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No. Pressure has little to do with hammer size. From 3.5" to 14", standard high-pressure hammers run at 1.7–1.8 MPa and ultra-high-pressure hammers at 2.0–2.4 MPa. What changes is air consumption — about 7.5–9 m³/min for 3.5" and 68–80 m³/min for 14". A larger piston already delivers more impact energy at the same pressure; it needs more air to keep its blow rate and clear the hole.
What determines the pressure I need?
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Three things: the hammer's design class (standard 1.7–1.8 MPa, ultra-high 2.0–2.4 MPa), hole depth (deeper holes mean more friction loss and back-pressure), and water — every 10 m of water above the bit adds 0.1 MPa of back-pressure.
What should I consider at high altitude?
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Air gets thinner with altitude, so the air actually delivered drops. Published industry data show a loss of roughly 7.5% per 1,000 m above 1,500 m — about 15% at 2,000 m. Size high-altitude projects one step up from the sea-level figure, and choose a turbocharged, high-altitude configuration with enlarged cooling.