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R25 150-160mm Tungsten Carbide Drill Coupling Sleeve

R25 150-160mm Tungsten Carbide Drill Coupling Sleeve

R25 150-160mm Tungsten Carbide Drill Coupling Sleeve
R25 150-160mm Tungsten Carbide Drill Coupling Sleeve
R25 150-160mm Tungsten Carbide Drill Coupling Sleeve
Product Details:
Place of Origin: China
Brand Name: MIROC
Certification: ISO
Model Number: R25 155-160mm
Payment & Shipping Terms:
Minimum Order Quantity: 50
Price: negotiation
Packaging Details: Carton Box or Wooden Box
Delivery Time: 25 days
Payment Terms: T/T or L/C
Supply Ability: 20000 pieces per month
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Detailed Product Description
Name: Drill Coupling Sleeve Material: High Quality Alloy Steel
Model: Full Bridge And Half Bridge Color: As Your Request
Aplication: Coupling Sleeve With Various Type Of Thread,widely For Extension Rod And Drill Bits Connection. Thread Type: R25, R28, R32, R38, T38,T45,T51,R28-R32,R28-R38,R32-T38,R32-R38,R25-R32,R32-T45
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crossover coupling


rock drilling tool

R25 150-160mm Tungsten Carbide Drill Coupling Sleeve



Threaded coupling sleeve is made of high quality of alloy steels and CNC machining guarantee our reliable and consistent quality control of coupling sleeves.Both semi-bridge and full-bridge coupling sleeves are manufactured by us in different sizes as below:

Thread sizes: R25, R28, R32, R35, R38, T38, T45, T51;
Two catagories: Standard coupling sleeves, adapter(crossover) coupling sleeves;

Semi-bridge coupling, by far is the most popular, has a small non-threaded bridge in the centre. The drill rod cannot thread past the centre of the couplings, and the smaller diameter rods portions butt together in the centre bridge area of the coupling. Semi-bridge couplings are most suited to high torque machines. Most rope (R) and Trapezoidal (T) threaded couplings are semi-bridged.

Full bridge coupling has a great advantage that it positively eliminates the potential for the coupling to creep along the threaded joints. These couplings, are typically used in a Trapezoidal thread, in surface drilling application, have better uncoupling characteristics and tend to maintain tighter joints. Full-bridge couplings have less chance of jamming and are best suited to machines equipped with independent rotation.

Adapter couplings are used when changing from one thread type, or size, to another and are typically required only in special circumstances.



• Underground Mining
• Tunneling


Competitive Advantage

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



Coupling Sleeve
Length Diameter Thread Weight Part Number
mm inch mm inch   kg  
R25 Coupling Sleeve
150 6 35 1 3/8 R25 0.7 4148300429
155 6 1/9 44 1 3/4 R25 1.0 4148300430
160 6 2/7 38 1 1/2 R25 1.3 4148300431

R25 150-160mm Tungsten Carbide Drill Coupling Sleeve 0R25 150-160mm Tungsten Carbide Drill Coupling Sleeve 1

Contact Details
KSQ Technologies (Beijing) Co. Ltd

Contact Person: Mr. Yingkai Zhang

Tel: +86 18501231988

Send your inquiry directly to us (0 / 3000)

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