Tubeless DTH Drilling System , Mining Drilling Tools No Footvalve

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Description Down the hole rock tools (drilling tools) are rock drilling equipment which takes compressed air as power source to partially transfer impact power into drilling holes. An air distributing device in a top hammer controls a piston to move back and forth. An impact device arranged in the front of the top hammer transfers the impact powderto a down-the-hole bit to crush rocks. 1.according to China's mining conditions, to absorb the advanced technology of domestic and foreign impactor and design and manufacture of the latest products. 2.reasonable selection of materials, advanced manufacturing technology, quality assurance perfect. 3.has higher drilling speed. 4.can provide hardening treatment in order to prolong the service life and reduce the cost of use. 5.single impact power is large, and the power consumption of broken rock is low. 6.piston and bit weight to have the best momentum transfer. 7.the modern theory is adopted in the structural design, which makes the stress wave duration longer, the stress amplitude is lower, and the piston life is long. Applications Widely used in mines, quarries, earthworks and other engineering drilling blasting hole, guardrail hole, mountain reinforcement, anchorage and other engineering holes, geothermal exploration hole, Well bore and other fields. Specifications - - - - NM Series High Air Pressure DTH Hammers Without Foot Valve Technical Data | Length(Without Bit) | NM4A | NM5A | NM6A | NM8A | 1005mm | 1110mm | 1161mm | 1338mm | Weight(Without Bit) | 40.00kg | 68.50kg | 90.00kg | 176.00kg | External Diameter | 99mm | 126mm | 142mm 144mm 146mm 148mm | 180/185mm | Bit Shank | NM4 | NM5 | NM6 | NM8 | Hole Range | 110-135mm | 155-190mm | 155-203mm | 195-254mm | Connection Thread | API2 3/8REG | API2 3/8REG API3 1/2REG API2 7/8REG | API3 1/2REG API2 7/8REG 2 7/8 IF | API4 1/2REG | Working Pressure | 1.2-2.0Mpa | 1.3-2.3Mpa | 1.5-2.5Mpa | 1.5-3.0Mpa | Impact Rate at 17 Bar | 30HZ | 28HZ | 25HZ | 22HZ | Recommended Rotation Speed | 25-40r/min | 20-35r/min | 20-30r/min | 15-25r/min | Air Consumption | 1.0Mpa:5.0m/min 1.8Mpa:9.0m/min 2.4Mpa:14.0m/min | 1.0Mpa:7.0m/min 1.8Mpa:14.0m/min 2.4Mpa:19.0m/min | 1.0Mpa:9.0m/min 1.8Mpa:18.0m/min 2.4Mpa:26.0m/min | 1.0Mpa:12.0m/min 1.8Mpa:22.0m/min 2.4Mpa:28.0m/min | - - - - Feature Advantage 1.Price commitment: in order to ensure the high reliability of products, raw material selection are using grapefruit brand products; under the same competitive conditions, and not to reduce product technical performance on the basis of sincerity at a favorable price to customers. 2.Quality commitment: product manufacturing and testing have quality records and inspection data; the performance of the product can withstand customer inspection. 3.Customer service: in order to create new diamond brand, enhance the visibility of enterprises, establish corporate image, we serve customers with the principle of "preferential prices, good service, reliable product quality" principle. The appearance of the picture is different from that of the actual product, and the actual product is the standard. - - - - NM Series High Air Pressure DTH Hammers Without Foot Valve | Item Description | Weight(kg) | NM4A | NM5A | NM6A | NM8A | 1,Top Sub | 6.50 | 13.70 | 20.00 | 34.00 | 2,O Ring Of Top Sub | 0.10 | 0.015 | 0.015 | 0.015 | 3,Breakout Ring | - | - | - | 0.30 | 4,Chenck Valve | 0.35 | 0.70 | 0.70 | 1.20 | 5,Spring | 0.05 | 0.10 | 0.10 | 0.10 | 6,Air Distributor | 1.50 | 2.00 | 3.50 | 6.00 | 7,Internal Cylinder | 2.10 | 2.80 | 4.20 | 6.50 | 8,Piston | 8.50 | 15.00 | 23.00 | 42.50 | 9,External Cylinder | 14.80 | 24.00 | 26.00 | 61.00 | 10,Guided Sleeve | 1.80 | 2.60 | 4.80 | 5.30 | 11,O Ring Of Stop Ring | 0.005 | 0.01 | 0.01 | 0.01 | 12,Stop Ring | 0.30 | 0.70 | 0.80 | 1.50 | 13,Breakout Ring | - | - | - | 0.30 | 14,Drive Chuck | 3.80 | 6.50 | 4.20 | 17.30 | 15,Drill Bit | 6.60 | 13.50 | 23.00 | 31.00 | - - - -

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Hunan New Diamond Construction Machinery Co., Ltd.

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