| 摘要 |
A thread cutting tool having an electric motor which is accommodated in a housing and, by means of at least one worm gearing, drives a holder ring which is rotatably mounted in a head ring. The electric motor has a speed of greater than 25,000 rpm. The worm-gear toothing of the holder ring has a modulus of less than approximately 1.6 mm. Due to the high speed, the electric motor can be very small, so that the thread cutting tool can be easily handled, and can have a low weight. Due to the low modulus, the high speed of the electric motor can be reduced to the operating speed of the holder ring without it being necessary that the worm gear have a large diameter. |
