12inch SD12 Rock Mining Well and Construction Drilling Down The Hole DTH Hammer

• Certification：ISO 9001:2000
• Standard：GB, GOST
• Surface Treatment：Spray-Paint
• Manufacturing Process：Forging
• Material：Alloy Steel
• Thread：API 6 5,8" Reg

=== Base Info ===

• Model NO.：SD12, DHD1120, NUMA120, NUMA125
• Bit Diameter：305-381mm
• 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 thread1880mm487kgΦ275mmSD12Φ305-Φ381API 6 5/8" RegWorking 
   pressureImpact rate at 
   1.7MPaRecommended  
   rotation speedAir consumption1.0MPa1.8MPa2.4MPa1.0-3.0MPa16Hz15-25r/min30m^3/min56m³/min78m^3/min Length (no bit)Weight (no bit)External diameterBit shankHole rangeConnection thread1880mm474kgΦ275mmDHD112Φ305-Φ381API 6 5/8" RegWorking 
   pressureImpact rate at 
   1.7MPaRecommended  
   rotation speedAir consumption1.0MPa1.8MPa2.4MPa1.0-3.0MPa20Hz15-25r/min28m^3/min50m³/min71m^3/min Length (no bit)Weight (no bit)External diameterBit shankHole rangeConnection thread1960mm470kgΦ275mmNUMA125Φ305-Φ381API 6 5/8" RegWorking 
   pressureImpact rate at 
   1.7MPaRecommended  
   rotation speedAir consumption1.0MPa1.8MPa2.4MPa1.0-3.0MPa20Hz15-25r/min28m^3/min50m³/min71m^3/min