SPM-A Series Tubeless DTH Hammer (without Foot Valve)

SPM-A Series  Tubeless DTH Hammer (without Foot Valve)
SPM-A Series  Tubeless DTH Hammer (without Foot Valve)
SPM-A Series  Tubeless DTH Hammer (without Foot Valve)
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Valveless down-the-hole hammers for rock drilling in hard to very hard rock formations with high air pressure

SPM-A series tubeless high-pressure DTH hammers are core drilling components for the mining and construction industries, designed for complex geological conditions to enhance drilling efficiency and quality. These hammers deliver stable operation and high single-impact energy, allowing effective penetration of hard rock while maintaining low air consumption and extended service life, reducing operational and replacement costs. The strong air-jet system enables efficient cuttings removal, and the hardened wear-resistant outer sleeve can be reversed to further extend replacement intervals.

Features
  • Optimized bit head: the button teeth with properly arranged flushing holes provide high drilling efficiency. Multiple head types and button tooth structures are available based on rock conditions.
  • Robust shank: Made from specialized drill steel with unique heat treatment to extend service life and improve energy transfer efficiency.
  • Convenient front connection: Multi-start threaded design with advanced surface treatment enables easier bit replacement.
  • Wear-resistant outer sleeve: Constructed from high-quality alloy steel with internal and external surface hardening, providing a 20-30% longer service life.
  • Optimized overall structure: Enhances durability, ensures smooth air operation, efficient energy transfer, and improved operational performance.
  • Durable cylinder: Advanced wear-resistant and hardened internal surface extends lifespan and reduces pressure loss.
  • New air distributor: Valve-free air distribution structure allows adaptable air-flow adjustments to match varying rock conditions.
  • Practical rear connection: Standard API threads with optional button tooth structure to meet different operational requirements.

Adjustable air plug: Allows operators to adjust air volume for cuttings removal according to rock hardness, abrasiveness, ensuring optimal cuttings removal and enhanced drilling efficiency.

Applications

The hammer is suitable for drilling blast holes in mining, slope protection and anchoring holes in road construction, and drilling geothermal, hydrological, and water well boreholes in energy and civil projects. Its tubeless design prevents hammer head damage caused by thermal expansion or contraction, ensuring reliable performance during transport and operation, supporting infrastructure construction and resource development projects.

Available Models
SPM-25A
  • Top sub
  • Top sub with o ring
  • Check valve dart
  • Check valve dart spring
  • Rigid valves
  • Internal cylinder
  • Piston
  • Piston case
  • Guide sleeve
  • Guide sleeve with o ring
  • Bit retainer ring
  • Driver sub

Technical Parameters

Parameter Specifications
Top sub connection DZ50 Pin
Hammer length (W/O bit), mm 825
Hammer OD, mm Ø71
Weight (W/O bit), kg 17.2
Wrench flat, mm 55
Piston weight, kg 3.9
Bit shank CWG76
Bit size range, mm 80-85
Recommended rotation speed, rpm 25-40
Feed force, kg 480-770
Air consumption, m³/min @10bar 3
@14bar 4.1
@17bar 7
SPM-30A
  • Top sub
  • Top sub with oring
  • Check valve dart
  • Check valve dart spring
  • Rigid valves
  • Internal cylinder
  • Piston
  • Piston case
  • Guide sleeve
  • Guide sleeve with oring
  • Bit retainer ring
  • Driver sub

Technical Parameters

Parameter Specifications
Top sub connection DZ50 Pin
Hammer length (W/O bit), mm 866
Hammer OD, mm Ø71
Weight (W/O bit), kg 17
Wrench flat, mm 55
Piston weight, kg 3.9
Bit shank SPM30A
Bit size range, mm 80-85
Recommended rotation speed, rpm 25-40
Feed force, kg 480-770
Air consumption, m³/min @10bar 3
@14bar 4.1
@17bar 7
SPM-40A
  • Top sub
  • Top sub with oring
  • Check valve dart
  • Check valve dart spring
  • Rigid valves
  • Internal cylinder
  • Piston case
  • Piston
  • Guide sleeve
  • O ring
  • Bit retainer ring
  • Driver sub

Technical Parameters

Parameter Specifications
Top sub connection API 2-3/8 REG Pin
Hammer length (W/O bit), mm 990
Hammer OD, mm Ø93
Weight (W/O bit), kg 34
Wrench flat, mm 75
Piston weight, kg 7.1
Bit shank DHD340A
Bit size range, mm 105-120
Recommended rotation speed, rpm 25-40
Feed force, kg 630-1100
Air consumption, m³/min @10bar 5.5
@17bar 9
@24bar 14
SPM-45A
  • Top sub
  • Top sub with oring
  • Check valve dart
  • Check valve dart spring
  • Rigid valves
  • Internal cylinder
  • Piston case
  • Piston
  • Guide sleeve
  • O ring
  • Bit retainer ring
  • Driver sub

Technical Parameters

Parameter Specifications
Top sub connection API 2-3/8 REG Pin
Hammer length (W/O bit), mm 986
Hammer OD, mm Ø99
Weight (W/O bit), kg 39
Wrench flat, mm 75
Piston weight, kg 8.6
Bit shank DHD340A
Bit size range, mm 115-130
Recommended rotation speed, rpm 25-40
Feed force, kg 690-1170
Air consumption, m³/min @10bar 6
@17bar 9.5
@24bar 15
SPM-55A
  • Top sub
  • Top sub with oring
  • Check valve dart
  • Check valve dart spring
  • Rigid valves
  • Internal cylinder
  • Piston case
  • Piston
  • Guide sleeve
  • O ring
  • Bit retainer ring
  • Driver sub

Technical Parameters

Parameter Specifications
Top sub connection API 2-3/8 REG Pin
Hammer length (W/O bit), mm 1020
Hammer OD, mm Ø126
Weight (W/O bit), kg 70
Wrench flat, mm 75
Piston weight, kg 15
Bit shank DHD350R
Bit size range, mm 138-152
Recommended rotation speed, rpm 25-35
Feed force, kg 830-1400
Air consumption, m³/min @10bar 7
@17bar 13.5
@24bar 19
SPM-65A
  • Top sub
  • Top sub with oring
  • Check valve dart
  • Check valve dart spring
  • Rigid valves
  • Internal cylinder
  • Piston case
  • Piston
  • Guide sleeve
  • Bit retainer ring
  • O ring
  • Driver sub

Technical Parameters

Parameter Specifications
Top sub connection API 3-1/2 REG Pin
Hammer length (W/O bit), mm 1238
Hammer OD, mm Ø148
Weight (W/O bit), kg 108
Wrench flat, mm 101
Piston weight, kg 23.8
Bit shank DHD360
Bit size range, mm 165-194
Recommended rotation speed, rpm 20-30
Feed force, kg 990-1746
Air consumption, m³/min @10bar 9
@17bar 17
@24bar 26
SPM-85A
  • Top sub
  • Top sub with oring
  • Check valve dart
  • Check valve dart spring
  • Rigid valves
  • Internal cylinder
  • Piston case
  • Piston
  • Guide sleeve
  • Bit retainer ring
  • O ring
  • Driver sub

Technical Parameters

Parameter Specifications
Top sub connection API 4-1/2 REG Pin
Hammer length (W/O bit), mm 1347
Hammer OD, mm Ø182
Weight (W/O bit), kg 178
Wrench flat, mm 150
Piston weight, kg 43
Bit shank DHD380
Bit size range, mm 203-305
Recommended rotation speed, rpm 20-30
Feed force, kg 990-1746
Air consumption, m³/min @10bar 11.5
@17bar 24
@24bar 39
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