{"product_id":"cir90-dth-hammer-4-inch-high-pressure-mining-quarrying","title":"CIR90 DTH Hammer — 4 in High-Pressure Down-the-Hole Hammer for Mining \u0026 Quarrying","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eCIR90\u003c\/strong\u003e is a 4-inch class high-pressure DTH (Down-the-Hole) hammer engineered for percussive drilling in medium-hard to hard rock formations. It delivers consistent impact energy and efficient air distribution across a working pressure range of 1.0–2.5 MPa (10–25 bar), making it suitable for mining blast holes, quarry bench drilling, water well construction, and foundation piling. The hammer uses a splined drive system and is compatible with the widely adopted DHD340 shank standard, which simplifies bit sourcing and fleet integration for contractors running mixed equipment.\u003c\/p\u003e\n\n\u003ch2\u003eKey Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch class (≈92 mm OD)\u003c\/strong\u003e for boreholes from 105 mm to 130 mm diameter — covers the most common blast-hole range in medium-to-large mining and quarrying operations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-pressure optimized\u003c\/strong\u003e — rated for 10–25 bar (1.0–2.5 MPa), delivering higher penetration rates at elevated pressure without sacrificing component life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSplined drive system\u003c\/strong\u003e for positive torque transmission to the bit — reduces shank wear compared to hex-drive designs in abrasive formations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eField-serviceable design\u003c\/strong\u003e — standard internal components (piston, distributor, check valve, retaining ring) can be inspected and replaced with common workshop tools, minimizing rig downtime.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDHD340 shank interface\u003c\/strong\u003e for broad bit compatibility — accepts bits from major manufacturers using the DHD340 \/ QL40 \/ SD4 shank pattern, reducing single-supplier lock-in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardened alloy steel body\u003c\/strong\u003e with precision-ground internal bore for consistent piston guidance and reduced internal air leakage over the wear life of the hammer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized air cycle\u003c\/strong\u003e — exhaust ports positioned to minimize back-pressure in the annulus and maximize effective blow energy at depth.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCIR90\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOuter Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 92 mm (3.62 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLength (hammer only, without bit)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 1,150 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBit Diameter Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e105–130 mm (4⅛–5⅛ in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWorking Pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10–25 bar (1.0–2.5 MPa)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eImpact Rate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 28–38 Hz at 18 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAir Consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 8–20 m³\/min depending on operating pressure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight (hammer only)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 38 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTop Sub Connection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAPI 2-3\/8\" Reg or API 2-7\/8\" Reg (configurable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBit Shank Standard\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDHD340 \/ CIR90\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRecommended Bit Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConcave, convex, or flat-face carbide button bit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe CIR90 DTH hammer uses the \u003cstrong\u003eDHD340 bit shank interface\u003c\/strong\u003e, one of the most widely adopted standards in the 4-inch DTH class. This means drill bits from major manufacturers using the DHD340 \/ QL40 \/ SD4 shank pattern are mechanically compatible — no adapter subs or modified bits required.\u003c\/p\u003e\n\u003cp\u003eThe top sub can be configured with \u003cstrong\u003eAPI 2-3\/8\" Reg\u003c\/strong\u003e or \u003cstrong\u003eAPI 2-7\/8\" Reg\u003c\/strong\u003e threads to match common drill pipe connections. The hammer is designed for use with standard DTH drill pipes and compatible with most pneumatic drilling rigs equipped with an appropriately sized air compressor. Minimum recommended compressor rating: 15 m³\/min at 18 bar for continuous operation.\u003c\/p\u003e\n\n\u003ch2\u003eWhy It Performs\u003c\/h2\u003e\n\u003cp\u003eThe CIR90's impact performance starts with its internal air distribution cycle. Compressed air enters through the backhead check valve, passes through the control tube, and is alternately routed above and below the piston by the distributor — a design that recovers expansion energy on the return stroke rather than venting it unused. The piston and cylinder bore are precision-ground to a tight running clearance, which reduces internal air leakage and maintains consistent blow energy as components wear in. The splined drive chuck transfers rotation from the drill string to the bit while allowing the bit to slide freely under impact — a simple, robust mechanism that can be serviced in the field without specialized tooling or a cleanroom environment.\u003c\/p\u003e\n\u003cp\u003eAir ports in the cylinder wall are positioned to optimize the timing of the power and return strokes, which directly affects penetration rate at depth where back-pressure from cuttings can otherwise degrade hammer performance. The bit retaining system uses a split-ring and retaining-ring design that holds the bit securely during tripping while allowing quick bit changes on the bench.\u003c\/p\u003e\n\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen-pit mining\u003c\/strong\u003e — blast hole drilling in hard rock benches (granite, basalt, limestone, iron ore, copper porphyry)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnderground mining\u003c\/strong\u003e — production and development drilling in medium-hard to hard formations, including sublevel stoping and longhole drilling applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuarrying\u003c\/strong\u003e — dimensional stone extraction and aggregate production in competent rock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater well drilling\u003c\/strong\u003e — deep boreholes in consolidated rock formations where rotary methods are slow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFoundation engineering\u003c\/strong\u003e — rock socket drilling for bored piles, caissons, and anchor systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGeothermal drilling\u003c\/strong\u003e — exploration and production wells in crystalline basement rock\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eQuality Control \u0026amp; Manufacturing\u003c\/h2\u003e\n\u003cp\u003eEach CIR90 hammer undergoes a documented inspection protocol before shipment. Critical dimensions — cylinder bore ID, piston OD, spline tooth profile and fit — are verified with calibrated measuring instruments traceable to national standards. Material certificates for the alloy steel body, piston, bit retaining system, and top sub are traceable to the heat lot.\u003c\/p\u003e\n\u003cp\u003eEvery assembled hammer is function-tested with compressed air to confirm free piston movement, check valve sealing, blow tube alignment, and absence of internal binding. Pre-shipment inspection records are available upon request and can be included in export documentation.\u003c\/p\u003e\n\n\u003ch2\u003eMOQ \u0026amp; Lead Time\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eMOQ:\u003c\/strong\u003e Depends on configuration, order quantity, and stock availability at time of inquiry. Trial orders for one or two units can typically be accommodated for first-time buyers evaluating quality and performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLead Time:\u003c\/strong\u003e Confirmed in the formal quotation based on the specific configuration, order quantity, and current production schedule. Rush orders may be possible for standard configurations when inventory is available.\u003c\/p\u003e\n\n\u003ch2\u003ePackaging\u003c\/h2\u003e\n\u003cp\u003eStandard export packaging: individual hammer wrapped in VCI (Volatile Corrosion Inhibitor) anti-rust paper with desiccant packs, placed in custom-cut high-density foam inserts inside a reinforced plywood case with steel corner brackets. Each case is marked with product identification, handling symbols, and customer-specific shipping marks as required. Hammers are palletized and stretch-wrapped for container loading. Custom packaging — including individual steel cases, branded cases, or consolidated multi-unit crates — is available on request.\u003c\/p\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCIR90 DTH hammer assembly (hammer body, piston, distributor, check valve, bit retaining system, top sub)\u003c\/li\u003e\n\u003cli\u003eCIR90 DTH hammer with matched carbide button drill bit (105–130 mm, bit type specified at order)\u003c\/li\u003e\n\u003cli\u003eComplete system: hammer + bit + drill pipes (API 2-3\/8\" or 2-7\/8\" Reg) + recommended spare parts kit\u003c\/li\u003e\n\u003cli\u003eCommissioning spare-parts package: foot valve, check valve assembly, O-ring and seal kit, bit retaining rings\u003c\/li\u003e\n\u003cli\u003eOptional: tool kit for field disassembly and reassembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is the CIR90 compatible with DHD340 bits from other manufacturers?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. The CIR90 uses the DHD340 (also marketed as QL40, SD4) bit shank interface — a widely adopted standard. Bits manufactured to this shank specification from any reputable supplier are mechanically compatible. We recommend confirming the shank drawing and tolerance class with both the bit and hammer supplier before placing an order.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What compressor capacity is needed to run the CIR90?\u003c\/strong\u003e\u003cbr\u003e\nA: At 18 bar, the CIR90 consumes approximately 15–16 m³\/min. We recommend a compressor rated at minimum 18 m³\/min at the operating pressure to allow headroom for depth-related losses and intermittent high-demand cycles. At 24–25 bar, consumption increases to approximately 20 m³\/min, and the compressor should be rated accordingly.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often does the hammer need to be serviced?\u003c\/strong\u003e\u003cbr\u003e\nA: Service intervals depend on rock abrasiveness, operating pressure, and air quality. In typical hard-rock mining at 18 bar with properly filtered air, we recommend inspecting internal components every 200–250 operating hours. The piston, distributor, and retaining rings are the primary wear items and can be replaced individually without replacing the entire hammer.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I order a single unit for trial?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. We support trial orders of one or two units for first-time buyers who want to evaluate quality and field performance before committing to a fleet order. Contact us with your rock formation details, rig specifications, and target borehole parameters, and we will recommend the optimal configuration.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What documentation is provided with each shipment?\u003c\/strong\u003e\u003cbr\u003e\nA: Standard export documentation includes a commercial invoice, packing list, and pre-shipment inspection record. Material certificates and certificates of origin can be provided upon request. All documentation relevant to customs clearance for the destination country is prepared before dispatch.\u003c\/p\u003e\n\n\u003ch2\u003eRequest a Quotation\u003c\/h2\u003e\n\u003cp\u003eTell us your rock formation type, target borehole diameter and depth, rig model, and available compressor capacity. We will recommend the optimal CIR90 configuration, compatible drill bits, and a spare-parts schedule — and return a formal quotation within one working day.\u003c\/p\u003e","brand":"PerfoMax","offers":[{"title":"Default Title","offer_id":45659617001679,"sku":"PFM-CIR90","price":0.0,"currency_code":"CNY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0656\/9308\/9999\/files\/A36d02979fc6d4454b0b7729b26e9bb80W.webp?v=1785287605","url":"https:\/\/perfomaxdrill.com\/products\/cir90-dth-hammer-4-inch-high-pressure-mining-quarrying","provider":" PerfoMax","version":"1.0","type":"link"}