there is a pair of flange drawings, the above mark is 6-M12 evenly distributed 23 drill 24, what is the specific meaning?
The 23 attack drill 24 means with drill out the light hole cylindrical surface depth of 24mm, and then use the screw thread tapping into the effective depth of 23mm, which uses standard gauge M12 can be screwed into the 23mm, however, it should be marked drawings of consultations, the final hole should have 1.5 to 2 times the pitch pitch (M12 is 1.75), is about 3mm of the margin, or even the best teacher is also very difficult to achieve. This is my old fashioned experience for reference.
This should be M12 thread depth, drilling depth of 24mm, tapping depth of 23mm.
The 6 holes of M12 are evenly distributed on one flange, the drilling depth of the screw hole is 24mm, and the depth of the wire tapping is 23mm.
If the bolts have been purchased, they will be drilled 27, and if the size of the workpiece is not enough, it must be changed to attack 21.However, since the M12 thread usually has a thread length of 10 to 12, the lengthened length is 15 to 16, and 16 is the thread matching surface. Plus 2mm margin, can be designated as tapping 18, drilling 22., so that processing operators more relaxed.As a result of the distribution of force per thread teeth suffered extremely uneven, some teeth burden some teeth almost no stress, length too long, is not obvious to improve the strength of thread, but on the processing and assembling to increase a lot of trouble, so, if it is not a special case, do not add the length of thread. Therefore, the ideal is to attack 12 drill 16 (put 2mm installation allowance), if the strength is not enough, to see whether the installation position can be changed to M14, according to the specific circumstances.
Matching flange, tapping a face is threaded M23, and its matching flange is bolt free access, that is, the smooth surface, must be 24 diameter. Otherwise, it can't be tightened.
