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All items can be customized: Sub coupling for drill pipe and adaptor for different drill pipe and hammer tools.
| Type | Diameter (mm) | Diameter (inch) | Length (mm) | Length (inch) | Connection Thread |
|---|---|---|---|---|---|
| Pin to Box | 59~146 | 2 3/8 ~ 5 3/4 | 120~235 | 4 23/32 ~ 9 1/4 | 2 3/8", 2 7/8", 3 1/2", 4 1/2" |
| Pin to Pin | 90~115 | 3 1/2 ~ 4 1/2 | 70~97 | 2 3/4 ~ 3 5/8 | 2 3/8" , 2 7/8", 3 1/2" |
| Box to Box | 77~205 | 3 ~ 8 1/8 | 200~270 | 7 7/8 ~ 10 5/8 | 2 3/8", 2 7/8", 3 1/2", 4 1/2", 6 5/8" |
Available sizes: 57mm, 65mm, 70mm, 75mm, 80mm, 105mm, 121mm and custom sizes.
| Size | Length | N | M | H | Material | Weight (kg) |
|---|---|---|---|---|---|---|
| 57mm | 365 | 190 | 170 | 40+0.5 | 40Cr/35CrMo | 4.5 |
| 65mm | 410 | 235 | 195 | 40+0.5 | 40Cr/35CrMo | 6.5 |
| 70mm | 410 | 235 | 195 | 40+0.5 | 40Cr/35CrMo | 7 |
| 75mm | 440 | 260 | 215 | 50+0.5 | 40Cr/35CrMo | 9 |
| 80mm | 440 | 260 | 215 | 50+0.5 | 40Cr/35CrMo | 10 |
| 105mm | 540 | 280 | 350 | 55+0.5 | 40Cr/35CrMo | 20 |
| 121mm | 530 | 280 | 350 | 65+0.5 | 40Cr/35CrMo | 25 |






A professional manufacturer specialized in R&D, sales, and service of industrial drilling tools. We cover geological exploration, jet grouting drilling, and water well drilling fields.
Our drilling tools are well-known for particular manufacturing techniques and reliable quality. The series of products has achieved advanced levels both domestically and abroad, gaining high customer recognition.
Available 7*24 hours online for your support.