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T51 Threaded Coupling Sleeve High Wear Resistance Full Bridge For Extension Rod

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T51 Threaded Coupling Sleeve High Wear Resistance Full Bridge For Extension Rod

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Brand Name : MIROC

Model Number : Coupling Sleeve

Place of Origin : China

MOQ : 1 Pieces

Price : negotiation

Payment Terms : L/C, T/T, Western Union, MoneyGram

Supply Ability : 20000 pieces per month

Delivery Time : 25 days

Packaging Details : Carton Box or Wooden Box

Thread type : R38 T38 T45 T51 R51

Length : 150-235MM

Diameter : 40-80mm

Connection Type : Full-bridge, semi-bridge, cross over

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Full Bridge R51 Threaded Coupling Sleeve For Bench Drilling High Wear Resistance

Coupling sleeves, other name is Coupling, when using rock drills with male shank adapters and a conventional drifter rod, a coupling is required to join the adapter to the rod, ensuring the ends touch for efficient energy transmission.
Coupling sleeves are also used to connect several rods to each other in the same way. Coupling sleeves have a middle stop to prevent over-threading on to the drill rod.

Thread: R22, R25, R28, R32, R38, T38, T45, T51,
Function: Coupling sleeve, Adapter Coupling
Type: Full-bridge, Semi-bridge

Basic Information

Product Name:

Thread coupling sleeve




35mm-77mm (or 1 3/8 inch to 3 inch)


150mm-235mm (or 6 inch to 9 1/4 inch)


High strength alloy steel bar


full-bridge, semi-bridge etc.


Green, Gold, Black or based on customer requirements.


No MOQ required for testing and trial order


R25, R28, R32, R38

Used in drifting and tunneling.

T38, T45, T51

Used in benching and long hole drilling.


CNC milling and proprietary heat treatment process

Competitive Advantage

High strength chromium-molybdenum steel with high fatigue strength and excellent wear resistance


Coupling Sleeve
LengthDiameterThreadWeightPart Number
mminchmminch kg 
R25 Coupling Sleeve
1506351 3/8R250.74148300429
1556 1/9441 3/4R251.04148300430
1606 2/7381 1/2R251.34148300431
R28 Coupling Sleeve
1506401 4/7R280.94148300483
1706 2/3552 1/6R282.04148300484
R32 Coupling Sleeve
1506441 3/4R321.04148300646
1606 2/7441 3/4R321.14148300647
R38 Coupling Sleeve
1706 2/3552 1/6R381.94148300703
1907 1/2552 1/6R382.14148300704
T38 Coupling Sleeve
1907 1/2552 1/6T382.14148300803
T45 Coupling Sleeve
2108 1/4632 1/2T453.04148300881
2108 1/4662 3/5T453.34148300882
T51 Coupling Sleeve
2258 6/7712 4/5T514.64148300961
2258 6/7763T514.84148300962
2359 1/4722 5/6T514.74148300963
2359 1/4773T514.94148300964

Product Tags:

Threaded Coupling Sleeve


R51 Drill Coupling

Wholesale T51 Threaded Coupling Sleeve High Wear Resistance Full Bridge For Extension Rod from china suppliers

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