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Basic Info.
Product Description
Coupling sleeves are available with both half-bridge and full-bridge types, as well as adapter couplings.
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.
| Thread model | Length(mm) | Part No. |
| R22*R22 | 140 | R22*140*R22 |
| R25*R25 | 150 | R25*150-R25 |
| R28*R28 | 150 | R28-150-R28 |
| R32*R32 | 150 | R32-150-R32 |
| R32*R32 | 160 | R32-160-R32 |
| R32*R32 | 170 | R32-170-R32 |
| T38*T38 | 170 | T38-170-T38 |
| T38*T38 | 180 | T38-180-T38 |
| T38*T38 | 190 | T38-190-T38 |
1. Q:Are you manufacturery or trade company?
A:We are manufacturer, has more than 20 years of professional production experience .Products including Top Hammer Drill Rod, Drill Bit,Tapper Button Bit and Rod, Integral Drill Rod etc.
2.Q: Do you offer warranty on your products?
A: Yes. For different products we offer different warranty that cover all manufacturing defects in materials and workmanship. The longest period of warranty is 6 months after shipping date.
3,Q: How is your quality control?
A: We have our own experienced QC.There will be strict inspection and testing for every order before shipping out.
4.Q: How long is your delivery time?
A: 1-3 days for the products in stock; regular order delivery in 2-3 weeks.
5.Q: After Services:
A: (1) Our sales team will response for your question within 24 hours (Holidays included).
(2) Technical Support will be available in any time.
(3)Free replacement will provide once the failure confirmed caused by our product quality.
6. Q:Methods of Payment:
A:We offer different payment terms, including T/T, D/A, D/P, L/C and O/A, etc. You can choose your preferred payment methods before we shipping the goods.