• Process：Forging
• Use：Drifting and Tunnelling
• Type：R25 R28 R32 R35
• Transport Package：Wood Package
• Specification：CE, SGS, ISO: 9001
• Trademark：Prodrill
• Origin：China
• HS Code：84314320
• Production Capacity：5000PCS,Months

Product Name:

coupling sleeve

Description:

coupling sleeve

use to connect several rods to each other

Material:

Alloy steel bar

MOQ:

5pcs

Type

full-bridge, semi-bridge,same diameter etc

Thread type

R22,R25,R28,R32,R38,T38,T45,T51

Diameter

33mm-76mm

Length

140mm-250mm

Color

Gold, Red

Semi-Bridge Coupling is a most use for coupling sleeves in market, product features as follow:

• Small non-threaded bridge in the center
• Steel cannot thread past bridge area
• Smaller diameter steel end portions fit together in the center bridge area of the coupling
• Semi-bridged couplings are most suited to high torque machines
• Most rope and HM threaded couplings are semi-bridged.

T38-190 semi-bridge type coupling

Main Products:

1-12 inch middle-low/high air pressure DTH hammers & bits
Big hole high air pressure DTH hammer using in water well, oil, gas and construction drilling 
Eccentric overburden drilling Equipment 
Hole opener bit 
Rock thread bit (R22, R25, R28, R32, R35, R38, T38, T45,T51, ST58,GT60)

Extension Rod, M/F Rod, M/m Rod, Drift Rod,
Shank adapter, coupling sleeves and all kinds of adapters 
Advantages:

Compared with the oversea brands, our advantages are bellowing:

a. Our products can match over 95% against the original products

b. Price are competitive against the famous brands and best quality against the small factory 

About Us:

1.    Our factory has been specialized in manufacturing drilling tools and spare parts for over 10 years.

2.    We have advanced technology and equipment.

3.    Our technician has more than 13 year's professional working experience.

4.    Rock drilling tools are exported throughout the world. Main market: Norway, Turkey, USA, Canada, Australia, Brazil, Uruguay, Philippines, Thailand, India, etc.