Extension Drill Rods Top Hammer Drilling Mm / Mf R32 R38 T38 T45 T51 St58 Gt60
10 pcs
Extension Drill Rods Top Hammer Drilling Mm / Mf R32 R38 T38 T45 T51 St58 Gt60
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Basic Infomation
Place of Origin: China
Brand Name: ROSCHEN
Certification: ISO, CE
Model Number: R32 R38 T38 T45 T51 St58 Gt60
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Payment & Shipping Terms
Packaging Details: Wooden boxes or Carton boxes
Supply Ability: 10000pcs/M
Product Description

Extension Drill Rods Top Hammer Drilling Mm / Mf R32 R38 T38 T45 T51 St58 Gt60
Product Intriduction

Model NO.
R32 R38 T38 T45 T51 St58 Gt60
VerticalProduction Capacity:2500000PCS Per Year
Automatic Grade
High PrecisionPayment Terms:L/C, T/T
Atlas Copco, Rock DrillLength:0.4-6.5m
Rod Type
Hex or Round(Plain)
ROSCHENUsage:Coal Mining
Transport Package
ISOMaterial:Stainless Steel
HS Code
72288000Structure:Deep Hole Drilling

Extension Rod
Produce Hexagonal and round cross sections, Hexagon rods are more rigid, heavier and transfer energy more efficiently, while increasing flushing. Round rods are generally lighter than hexagonal rods and are normally used in extension drilling applications. With the longer steel tending to be larger in diameter, conventional extension steel is characterized by a duplicate thread on each end of the steel.
Male/Female (M/F) rod, speed rod
M/F drill steel is an alternative to couplings sleeves to include the female part of the threaded connection as an integral part of the drill steel. M/F drill steel provides more rigid connections and is easier to uncouple and handle. The service life also tends to be better than with separate couplings. The advantages of drilling with M/F steel include: Easy handling, quicker uncoupling, tighter connections, the potential to drill straighter holes, and longer service life.
Feature and Advantage
For Extension Rod and M/F steel process, the below two different types of heat treatment are used to strengthen high speed and powerful percussive drill string components to maximize their performance and reliability. Longer steel larger in diameter, conventional extension steel, Hexagonal and round cross sections are available.
- Carburization is a process used to harden the entire rod surface both internally and externally to strengthen and extend the life of the rod.
- High Frequency Induction is a process where only the thread ends of the rod are hardened to lengthen thread life.

Extension rod size
R32-Round32-R32 length 3 4 6 8 10 12 ft
T38 (R38) Round39-T38 (38), length 4' 6' 10' 12'ft
T45 -Round46-T45, length 10' 12' 14' 20' ft
T51 -Round52-T51, length 12' 14' 20' ft
MF rod /speed rod size
MF-rod R32-Round32-R32, length 3 4 5 6 10 12 14 ft
MF Rod T38-Round39-T38, length 4 5 6 10 12 14 ft
MF Rod T45-Round46-T45, length 5 6 10 12 14 20 ft
MF Rod T51-Round52-T51, length 6 12 14 20 ft
MF Rod ST58-Round60-ST58, length 12 14 20 ft

  1. Steel grade: 20CrNi3Mo equivalent to SANDBAR 64

SIZE: Hex. 22mm. Hex. 25mm, hex. 28mm. Hex. 32mm hex. 35mm
Dia. 32mm. Dia. 38mm, dia. 45mm dia. 51 mm

  1. Thread: R22, R25, R28, R32, R38, T38, T45, T51, ST58, T60
  2. Length: 0.4m-10m
  3. Package: In wooden case or in bundles.
Product NameSizeSpecificationLength
R25 RodHex25R25-Hex25-R25610mm, 915mm, 1220mm, 1525mm,1830mm,2435mm, 3050mm, 3660mm
Hex28R32-Hex28-R253090mm, 3700mm
R28 RodHex28R32-Hex28-R282475mm,2590mm,3090mm,3700mm,4005mm,4305mm
R38-Hex28-R283090mm, 3700mm,4305mm
R32 RodHex32R32-Hex32-R322475mm,3090mm,3700mm,4305mm
R38-Hex32-R322475mm, 3090mm,3700mm, 4005mm,4305mm, 4610mm,4915mm
T38-Hex35-R32 MF-rod3090mm,3700mm,4305mm,4915mm,5525mm,6140mm

Contact Us:
Email: roschen@roschen.com; roschen@roschen.net
Tel::+86 13764195009 ; WeChat: 13764195009
Website: http://www.roschen.net

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Get in touch with us
Contact Person : Bill, George, Michael
Tel : 13764195009
Fax : 86-021-54380177
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