8inch Down The Hole Drilling DTH Air Hammer for Rock Mining and Well Drilling

• Certification：ISO 9001:2000
• Standard：GB, GOST
• Surface Treatment：Spray-Paint
• Manufacturing Process：Forging
• Material：Alloy Steel
• Thread：API 4 1,2" Reg

=== Base Info ===

• Model NO.：HD85, DHD380, COP84. M80, SD8, QL80
• Bit Diameter：200-279mm
• Color：on Request
• Condition：100% New
• Delivery：25-30days
• MOQ：1PCS
• After Sale Service：Yes
• OEM/ODM：Yes
• Transport Package：Plywood Box
• Trademark：SANSUNG
• Origin：China
• HS Code：82071990
• Production Capacity：50000 PCS,Year

=== Description ===
Length  (no bit)Weight (no bit)External  diameterBit shankHole rangeConnection thread1492mm187kgΦ180mmCop84
   DHD380Φ200-Φ279API 4 1/2" RegWorking 
   pressureImpact rate at 
   1.7MPaRecommended  
   rotation speedAir consumption1.0MPa1.8MPa2.4MPa1.0-2.5MPa20Hz15-25r/min15m^3/min26m³/min34m^3/min Length (no bit)Weight (no bit)External diameterBit shankHole rangeConnection thread1463mm192kgΦ180mmSD8Φ200-Φ279API 4 1/2" RegWorking 
   pressureImpact rate at 
   1.7MPaRecommended  
   rotation speedAir consumption1.0MPa1.8MPa2.4MPa1.0-2.5MPa20Hz15-25r/min15m^3/min26m³/min34m^3/min Length (no bit)Weight (no bit)External diameterBit shankHole rangeConnection thread1465mm182kgΦ185mmQL80Φ200-Φ279API 4 1/2" RegWorking 
   pressureImpact rate at 
   1.7MPaRecommended  
   rotation speedAir consumption1.0MPa1.8MPa2.4MPa1.0-2.5MPa20Hz15-25r/min15m^3/min26m³/min34m^3/min