For twin-screw threaded sleeve drilling, use the standard drill bits listed in the table to drill, and the drilling depth is greater than or equal to the depth of the wire threaded sleeve device; be careful not to drill the hole into a cone shape and do not drop the chips. After drilling, the hole should not exceed the depth of 0.4 pitch, because the hole is too large, which is not conducive to the screwing of the wire screw sleeve. Double screw thread sleeve tapping uses special taps for wire thread sleeves marked with regular thread specifications.
The length of the wire must exceed the length of the wire thread insert. Regarding the through hole, all the threads must be tapped; the accuracy of the tapping is determined by the final specification of the service belt of the internal screw hole. The user must appropriately select the tapping method and smooth, blind hole tapping. The wire should be properly applied to prevent the tap from breaking. After tapping, the threaded holes should be cleaned up, usually with a compressed air spray gun. For blind holes, a long spray gun with a diameter-like hole should be used to clean the threaded holes from bottom to top. The threaded holes can also be cleaned by cleaning. When the precision of the threaded hole is high, use the special wire thread insert bottom hole plug gauge to check.
Twin screw thread sleeve device is generally used for wire thread thread sleeve device using a manual device. Put the wire thread insert into the device, insert the handle of the device into the guide rod groove and roll the handle of the device so that the wire thread insert is screwed into the screw hole, and leave a 0.25---0.75 circle hole thread from the surface. A small number of wire thread inserts and coarse thread thread thread inserts above M14*2 can be used with "T" type slotting or threaded head simple device, and be careful not to apply a large axial force on the handle of the wire thread insert In order to prevent "random buckle". After the wire thread insert is installed, in order to check the accuracy grade of the internal threaded hole constituted by the specification, the corresponding grade plug gauge can be used to check.
Double-screw threaded sleeves have a shank and a steel wire threaded sleeve with a broken groove. After screwing into the screw hole, the handle of the device should be removed, and a shank must be used. When passing through the hole, the handle of the wire thread insert should be broken. Generally, use a punch to align the handle of the device and use a hammer of about 200g to remove it. Regarding the coarse thread thread insert above M18*2.5 and M14*1.25 The above fine-tooth steel wire threaded sleeve can be broken off with needle-nose pliers. Then remove the broken device handle from the screw hole. If an active breaker is used, only the punch of the active breaker can be used to break the handle of the device by pressing a proper force on the wire thread insert installed in the bottom hole.