| Patents for B23G 1 - Thread cutting; Automatic machines specially designed therefor (3,392) |
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| 04/25/1990 | EP0364600A1 Round screw machining method |
| 04/19/1990 | DE3835496A1 Method and arrangement for making tapped through-holes by machine |
| 04/11/1990 | CN2055757U Big pitch screw hole tapping device |
| 04/10/1990 | CA1267508A1 Thread cutting diestock assembly |
| 04/04/1990 | EP0360947A1 Collet to hold a tool, especially a cutting tool |
| 03/27/1990 | US4912385 Tapping control apparatus |
| 03/27/1990 | US4911588 Tapping apparatus |
| 03/21/1990 | CN2054729U Automatic 8 workpieces tapping machine |
| 03/15/1990 | DE3831046A1 Hollow milling cutter for producing circular recesses of infinitely variable diameter |
| 02/22/1990 | WO1990001388A1 Device for confirming the tap operation in the rigid tapping |
| 02/01/1990 | DE3922707A1 Method of producing tapped holes and tool for carrying out this method |
| 01/30/1990 | CA1264923A1 Tool holder |
| 12/27/1989 | CN2049979U Hand threading machine |
| 11/22/1989 | CN1037293A Tool driving unit |
| 11/15/1989 | EP0341485A1 Cutting method for the flanks of one part warms and one part a worm cutting machine |
| 11/14/1989 | US4879929 Tapper/threader assembly |
| 11/08/1989 | CN2047202U Biaxial full automatic tapping machine |
| 11/02/1989 | WO1989010225A1 Process and machine for cutting flanks of one-piece endless screws |
| 10/11/1989 | CN1036161A Universal tools with impact and adjustable function for plumbers |
| 10/05/1989 | WO1989009108A1 Device and tool for producing internal screw threads without pilot drilling in a solid material |
| 10/04/1989 | EP0335084A2 Device and tool for producing all types of threads (except buttress threads) in a single operation |
| 10/04/1989 | CN2045341U Machine for tube holing and wire-coiling |
| 09/28/1989 | DE3810884C1 Apparatus for producing internal threads without predrilling in the solid material |
| 09/26/1989 | CA1260210A1 Method of forming an external helical ball screw |
| 09/21/1989 | WO1989008521A1 Round screw machining method |
| 09/06/1989 | CN2043903U Slipping thrust tap-stocks |
| 08/30/1989 | CN2043541U Machine for guiding the threading tool |
| 08/30/1989 | CN2043540U 回转式螺母攻丝机 Rotary nut tapping machine |
| 08/29/1989 | US4860501 Method of and machine for grinding internal threads |
| 08/24/1989 | DE3804291A1 Clamping screw |
| 08/23/1989 | CN2043148U Drill pipe threading machine tool |
| 08/22/1989 | EP0277968A4 Spindle driver for machine tools. |
| 08/16/1989 | CN2042765U Milling thread positioner |
| 08/15/1989 | US4856946 Threading assembly |
| 08/09/1989 | CN2042388U Wheel-clip type milling flutes machine for wood screw |
| 08/02/1989 | EP0326302A2 Apparatus for automatically stopping operation of a cutting machine |
| 07/26/1989 | CN2041599U Milscale filament rod finishing machine |
| 06/22/1989 | DE3742003A1 Turning machine (lathe) |
| 06/13/1989 | CA1255459A1 Thread cutting die head for power driven threading machines |
| 05/31/1989 | EP0318419A2 Threading machine chuck |
| 05/31/1989 | EP0318414A2 Two speed transmission for power driven threading machine |
| 05/23/1989 | US4832542 Clutching means adapted for tapping attachment |
| 05/23/1989 | US4831674 Drilling and threading tool and method for drilling and threading |
| 05/18/1989 | DE3737315A1 Tool for boring and thread cutting |
| 04/18/1989 | US4822216 Partial hole threading system |
| 04/13/1989 | DE3732595A1 Method of signalling faults in quick-change tap chucks by means of an infrared remote control system |
| 04/11/1989 | US4820087 Tap drive unit for machine tools |
| 04/11/1989 | US4819527 Threading machine chuck |
| 04/05/1989 | CN2035292U Ratchet wrench for screwing die |
| 03/29/1989 | CN2034886U Multi-shaft tapping apparatus |
| 03/21/1989 | US4813821 Thread cutting machine |
| 03/14/1989 | US4811639 Drive bar attachment for threading machines |
| 03/08/1989 | CN2033722U Mini-tapper |
| 02/28/1989 | US4808047 Variable speed motor tapping attachment |
| 02/22/1989 | EP0304388A2 Nipple chuck |
| 02/21/1989 | US4805253 Device for brushing threaded bores |
| 02/15/1989 | EP0302915A1 Combined hole making and threading tool. |
| 02/07/1989 | CA1249703A1 Base construction for threading machines |
| 01/24/1989 | US4799832 Ratchet tap wrench |
| 01/24/1989 | US4799372 Process for forming helical screw threads having a flank with zero or negative inclination |
| 01/12/1989 | DE3721732A1 Thread-whirling apparatus |
| 01/03/1989 | US4795175 Nipple chuck |
| 12/29/1988 | DE3719615A1 Turning handle for taps |
| 12/28/1988 | CN87101572A Machining process of high-precision ultrashort-pitch cycloidal screw |
| 12/28/1988 | CA1247309A Threading and projection forming on different size diameter |
| 12/21/1988 | CN88203400U Apparatus for cutting pipe and processing thread |
| 12/15/1988 | DE3744690A1 Waermeaustauscher Heat Exchangers |
| 12/14/1988 | EP0294486A1 Tapping controller |
| 12/06/1988 | US4789943 Thread cutting control method |
| 11/29/1988 | US4787531 Cover and seal for power driven threading machine oil reservoir |
| 11/17/1988 | EP0291439A2 Thread cutting diestock assembly |
| 11/09/1988 | CN87101911A Screw rod |
| 10/25/1988 | US4780031 Ratchet die stock |
| 10/25/1988 | US4780030 Manual tap guide |
| 10/18/1988 | US4778313 Intelligent tool system |
| 10/12/1988 | EP0286128A2 Clutching means adapted for tapping attachment |
| 09/28/1988 | CN87209097U Floating lapping tooth plane device |
| 09/14/1988 | EP0282388A1 Device for brushing threaded bore holes |
| 09/07/1988 | CN87202766U Hand electric tapping machine |
| 08/17/1988 | EP0278930A2 Drilling and threading tool |
| 08/17/1988 | EP0277968A1 Spindle driver for machine tools |
| 08/09/1988 | US4761844 Combined hole making and threading tool |
| 08/02/1988 | US4761100 Method of tapping on a press, and apparatus for implementing the method |
| 08/02/1988 | US4760635 Method of forming a helical ball screw member |
| 07/28/1988 | WO1988005361A1 Combined hole making and threading tool |
| 07/27/1988 | CN87103520A Method of and apparatus for thread mill drilling |
| 07/19/1988 | US4757598 Two speed transmission for power driven threading machine |
| 07/14/1988 | DE3716087C1 Method of making blind tapped holes in connecting flanges of heat exchangers |
| 06/21/1988 | US4752163 Thread cutting diestock assembly |
| 06/21/1988 | US4752159 Tapered thread forming apparatus and method |
| 05/25/1988 | EP0267964A1 System for controlling the tapping operation |
| 05/19/1988 | WO1988003451A1 Tapping controller |
| 05/03/1988 | US4741650 Tool holder |
| 04/26/1988 | US4740120 Thread tapping machine tool |
| 04/20/1988 | CN87207661U Superminiature tap with self-return function |
| 04/06/1988 | CN87203299U Multifunctional pipe-processing machine |
| 03/30/1988 | CN87205641U Two-way tap wrench |
| 03/23/1988 | CN87205657U Automatic recovery tapping device |
| 03/03/1988 | DE3627968A1 Guide sub-assembly for universal hand drilling for universal mechanical treatment |
| 03/02/1988 | CN87202953U Manual electric machine for drilling, threading and looping |