{"product_id":"dth-hammer-down-the-hole-pneumatic-hammer-for-blast-hole-and-water-well-drilling","title":"DTH Hammer Selection Guide — Choose by Hole Size, Shank, Pressure and Air Supply","description":"\u003csection class=\"pm-product-copy\"\u003e\u003ch2\u003eDTH Hammer Series Selection Guide\u003c\/h2\u003e\n\u003cp\u003eThis is a selection page for PerfoMax down-the-hole hammer systems, not a single fixed-specification model. Use it to narrow the hammer class, bit shank, top-sub thread and air requirement before quotation.\u003c\/p\u003e\n\u003ch2\u003eFive Inputs Required\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTarget hole diameter and depth\u003c\/li\u003e\n\u003cli\u003eRock strength, abrasiveness and fracture condition\u003c\/li\u003e\n\u003cli\u003eDrill rig model and rotation torque\u003c\/li\u003e\n\u003cli\u003eCompressor free-air delivery and pressure at the rig\u003c\/li\u003e\n\u003cli\u003eExisting bit shank and drill-pipe thread, if interchangeability is required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSeries Comparison\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSelection point\u003c\/th\u003e\n\u003cth\u003eCIR90\u003c\/th\u003e\n\u003cth\u003eCIR110\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal class\u003c\/td\u003e\n\u003ctd\u003e4-inch class\u003c\/td\u003e\n\u003ctd\u003e5-inch class\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTypical role\u003c\/td\u003e\n\u003ctd\u003eMedium-diameter mining, quarry and water-well drilling\u003c\/td\u003e\n\u003ctd\u003eLarger-diameter production, quarry and water-well drilling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection\u003c\/td\u003e\n\u003ctd\u003eConfirm DHD340-class shank and selected top sub\u003c\/td\u003e\n\u003ctd\u003eConfirm CIR110-class shank and selected top sub\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir supply\u003c\/td\u003e\n\u003ctd\u003eConfirm against pressure, depth and hole cleaning\u003c\/td\u003e\n\u003ctd\u003eGreater air volume; verify compressor before ordering\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eFinal model, shank, thread and operating range are confirmed in the signed quotation or technical agreement.\u003c\/p\u003e\n\u003ch2\u003eCompatibility Rules\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBit shank must match the hammer chuck and retaining system exactly.\u003c\/li\u003e\n\u003cli\u003eTop-sub thread must match the drill pipe or an approved adapter arrangement.\u003c\/li\u003e\n\u003cli\u003eDo not assume CIR90 and CIR110 bits, internals or top subs are interchangeable.\u003c\/li\u003e\n\u003cli\u003eCompressor nameplate pressure alone is insufficient; flow at operating pressure and altitude must be checked.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eComplete System\u003c\/h2\u003e\n\u003cp\u003eA matched system can include hammer, bit, drill pipe, compressor, lubricator, commissioning spares and wear parts. Penetration rate and component life depend on the system being correctly matched.\u003c\/p\u003e\n\u003ch2\u003eQuality and Supply Scope\u003c\/h2\u003e\n\u003cp\u003eDepending on the order, PerfoMax can provide model and connection verification, functional inspection, packing list and agreed technical records. Exact inspection and document scope is confirmed before order placement.\u003c\/p\u003e\n\u003ch2\u003eRequest a Technical Recommendation\u003c\/h2\u003e\n\u003cp\u003eSend hole diameter and depth, rock information, rig model, compressor pressure and flow, connection drawings or photos, destination and quantity.\u003c\/p\u003e\u003c\/section\u003e","brand":"PerfoMax","offers":[{"title":"Default Title","offer_id":45648314532047,"sku":"PFM-DTH-HAMMER","price":0.0,"currency_code":"CNY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0656\/9308\/9999\/files\/dth-hammer-main.webp?v=1785199233","url":"https:\/\/perfomaxdrill.com\/products\/dth-hammer-down-the-hole-pneumatic-hammer-for-blast-hole-and-water-well-drilling","provider":" PerfoMax","version":"1.0","type":"link"}