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

MOQ： 10 PCS
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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
Brand Name	HLDRILL
Certification	ISO9001
Place of Origin	China

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Product Details
Company Details

Product Specification


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	Brand Name	HLDRILL
Certification	ISO9001	Place of Origin	China
High Light	T51 Coupling Sleeve ，Rock Drilling Connector Sleeve ，Connector Sleeve

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
Coupling sleeves	mm	foot	mm	inch	Thread	Weight (kg)	HengLongDRLL P/N
	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

Company Details

Bronze Gleitlager

Bronze Sleeve Bushings

and

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from Quality China Factory

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Business Type:

Manufacturer,Exporter,Trading Company,Seller,Other 
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Year Established:

2018 
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Total Annual:

10000000-30000000
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Employee Number:

30~50 


Ecer Certification：

Verified Supplier 

HENGLONG is an internationally recognized and leading producer of superior percussive rock drilling tools.Our high performance products include top hammer drill bits extension and tunneling rods,integral and tapered rods,shank adapters,coupling,drag bits,blast furnace tapping tools,self dr... HENGLONG is an internationally recognized and leading producer of superior percussive rock drilling tools.Our high performance products include top hammer drill bits extension and tunneling rods,integral and tapered rods,shank adapters,coupling,drag bits,blast furnace tapping tools,self dr...

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Yanggu Henglong Construction Machinery Co., Ltd.
4F,6# Building,No.19 Hunan Road,Liaocheng City,Shangdong province,China
https://www.drillbuttonbit.com/

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