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T51 Coupling Sleeve , High Torque Connector Sleeve For Top Hammer Rock Drilling

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T51 Coupling Sleeve , High Torque Connector Sleeve For Top Hammer Rock Drilling

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Brand Name : HLDRILL

Certification : ISO9001

Place of Origin : China

MOQ : 10 PCS

Price : Please contact us

Payment Terms : T/T

Supply Ability : 2000 PCS Per month

Delivery Time : 15 Days

Packaging Details : Wooden Box

Product Name : T51 Connecting Sleeve

Product type : Drill pipe connecting sleeve / connector sleeve

Applicable equipment : Top hammer hydraulic rock drilling rig, drilling machine

Applicable working conditions : Mining, tunneling, medium and heavy rock drilling operations

Connection specification : T51 internal thread

Application : Used for connecting T51 drill pipes to transmit impact and torque

Material : High-strength alloy structural steel

Manufacturing process : precision machining, high coaxiality, wear-resistant and impact-resistant

Performance : High torque transmission, secure and slip-free connection; high thread precision, non-sticking and non-disengaging

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T51 Coupling Sleeve: High-Torque Connector for Top-Hammer Rock Drilling
T51 coupling sleeves are core connecting components in top-hammer rock drilling tools, used to connect T51 specification drill rods and shanks. They are engineered for heavy-duty operations including open-pit mining and tunnel excavation, delivering high torque transmission, exceptional durability, and precise power transfer.
Mainstream Types and Applications
Semi-Bridge Type
  • Structure: Features a non-threaded isolation bridge in the middle that prevents drill pipe threads from passing through
  • Advantages: High torque resistance, prevents thread slippage, ideal for heavy-duty drilling rigs
  • Applications: High-torque downhole operations, deep hole drilling, and frequent impact conditions
Full-Bridge Type
  • Structure: Continuous threading without isolation bridge, eliminating connection creep risk
  • Advantages: Easy disassembly, strong joint sealing, low drill pipe jamming rate
  • Applications: Open-pit mining, quarries, and large-diameter shallow hole operations
Crossover Type
  • Structure: Different threads at both ends (e.g., T45-T51) for connecting various drilling tool specifications
  • Advantages: Compatible with multiple drill pipe and bit models, reduces equipment adaptation costs
  • Applications: Mixed specification drilling tool usage, equipment upgrade and modification projects

Coupling sleeves

Length

Outer dia.

Thread

Weight (kg)

HengLongDRLL P/N

mm

foot

mm

inch

T51 Coupling Sleeve , High Torque Connector Sleeve For Top Hammer Rock Drilling

225

8 7/8

71

2 51/64

T51

4.6

31-T51-71-225-23

225

8 7/8

76

3

T51

4.8

31-T51-76-225-23

235

9 1/4

72

2 7/8

T51

4.7

31-T51-72-235-23

235

9 1/4

77

3 1/32

T51

4.9

31-T51-77-235-23
Technical Features and Performance Benefits
  • High Torque and Fatigue Resistance: Carburizing and quenching process enhances surface hardness and core toughness, withstanding high-frequency impacts and rotational torque for extended service life
  • Precise Power Transmission: Semi-bridge type uses isolation bridge positioning while full-bridge type features continuous threading, ensuring efficient power transfer and reducing thread loosening risks
  • Superior Compatibility: Works with mainstream top hammer drilling rigs (Atlas Copco, Sandvik) and supports custom lengths, surface treatments, and diameter specifications
  • Reduced Maintenance: Full-bridge type offers easy disassembly while semi-bridge type provides excellent anti-fouling capabilities, lowering on-site maintenance costs

Product Tags:

T51 Coupling Sleeve

      

Rock Drilling Connector Sleeve

      

Connector Sleeve

      
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