imported_brian_m
Cast Iron
- Joined
- Jun 25, 2006
- Location
- Oregon
So, I have a new mill with rigid tapping, (Fanuc OiMF control) and a job to do. The job is to drill and tap the end of a number of 0.375 aluminum rods with a 6-32 thread to a depth of 0.375 inch to accept a screw to secure a knob. The flats for the knob are cut in another process because they must be aligned to other features.
I would appreciate advice to make a fast start on the project and reduce my learning time. I am happy with the coding side of things but I need practical advice.
I have built a jig so that two rods at a time can be mounted in a vise. The first process will be to mill the rods to consistent heights which will provide my Z surface. Obviously the next jobs will be to drill and tap which is where my learning curve steepens,
Questions.
The working thread in the rod needs to be 0.375 deep. How deep should I drill to allow bottom clearance for the tap yet still providing a true 0.375 depth of thread? (This will, I imagine depend on the tap).
Which specific type of tap should I use for this job bearing in mind I am tapping into a blind hole? I do not see that I could do the usual hand "taper followed by plug" so how will this effect the tapping depth and hole depth? I suppose I could machine taper tap followed by hand plug tap if I had to.
Should I chip break or peck with a 6-32 tap?
Thanks for any info. you can provide. I am really looking forward to using this new capability.
Brian
I would appreciate advice to make a fast start on the project and reduce my learning time. I am happy with the coding side of things but I need practical advice.
I have built a jig so that two rods at a time can be mounted in a vise. The first process will be to mill the rods to consistent heights which will provide my Z surface. Obviously the next jobs will be to drill and tap which is where my learning curve steepens,
Questions.
The working thread in the rod needs to be 0.375 deep. How deep should I drill to allow bottom clearance for the tap yet still providing a true 0.375 depth of thread? (This will, I imagine depend on the tap).
Which specific type of tap should I use for this job bearing in mind I am tapping into a blind hole? I do not see that I could do the usual hand "taper followed by plug" so how will this effect the tapping depth and hole depth? I suppose I could machine taper tap followed by hand plug tap if I had to.
Should I chip break or peck with a 6-32 tap?
Thanks for any info. you can provide. I am really looking forward to using this new capability.
Brian