Description
R32 Coupling Sleeve — 42 mm OD, 160 / 190 mm
The R32 coupling sleeve joins two R32 extension drill rods to build a continuous drill string. It is machined from 40Cr / C45 steel and heat-treated to HRC 20–30, with the R32 thread cut to the ISO 10208 profile in either left-hand or right-hand rotation to match your rod set.
Two standard lengths cover the usual setups: 160 mm for standard bench and drifting strings, and 190 mm where extra thread engagement or a longer make-up is needed. The 42 mm outside diameter is machined concentric with the thread so the string runs true at depth.
Specification
- Model: R32 coupling sleeve
- Outside diameter: 42 mm
- Length: 160 mm or 190 mm
- Thread: R32, R thread profile to ISO 10208
- Rotation: left hand or right hand (specify when ordering)
- Material: 40Cr / C45 carbon and alloy steel
- Hardness: HRC 20–30
- Weight: 0.82 kg (160 mm) / 1.00 kg (190 mm)
- Fits: R32 extension drill rods and R32 shank adapters
Features
- ISO 10208 R32 thread cut to gauge for a joint that seats squarely and runs true.
- 42 mm OD gives a stiffer joint than a slimmer sleeve, which matters on deep or long-hole strings.
- 40Cr / C45 steel heat-treated to HRC 20–30 resists thread wear without becoming brittle.
- Two lengths available so you can match your existing rod set instead of changing the string.
- Left- or right-hand thread, other lengths and OEM marking all made to order.
Frequently asked questions
Which length should I choose, 160 mm or 190 mm?
Match what your rods already use: 160 mm covers most standard R32 bench and drifting strings, while 190 mm suits setups that need a longer make-up or extra thread engagement. If you are building a new string from scratch, tell us your rod length and we will advise.
Left-hand or right-hand thread?
R32 rods are made in both directions, so the sleeve must match the rods. Check the rotation of your drill string before ordering — ordering the wrong hand means the joint will unscrew under load.
How much does an R32 coupling sleeve weigh?
About 0.82 kg for the 160 mm version and 1.00 kg for the 190 mm version.
Can you supply other sizes?
Yes. R25, R28, R38, T38, T45 and T51 sleeves, other outside diameters and lengths, and OEM marking are all available on request.
Related rock drilling tools
- R25 coupling sleeve — 35 mm OD, 150 mm
- Q1076T38 thread button bit — T38, 76 mm
- Q945-R32 thread button bit — R32, 45 mm
- Full rock drilling tool catalogue
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