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Home / Products / Coupling Sleeve /

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

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

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

Brand Name: HLDRILL
MOQ: 10 PCS
Price: Please contact us
Payment Terms: T/T
Supply Ability: 2000 PCS Per month
Detail Information
Product Description
Detail Information
Place of Origin:
China
Certification:
ISO9001
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
Packaging Details:
Wooden Box
Highlight:

T51 Coupling Sleeve

,

Rock Drilling Connector Sleeve

,

Connector Sleeve

Product Description
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 0

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
Tags: 

Connecting Sleeve  

Connection Sleeve  

Connector Sleeve

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