shaft tappers

brianna187

brianna187

BRIANNA SINCE 1988
Silver Member
would anyone like to share some shaht tappers i have written several programs for cnc shaft tappers i would be willing to share
 
(this Program Will Run 1 Time)

G00 Z1.0
G00 Y-.1
G00 X30.125
G00 Z0
G01 Y.1175 F30.0
G01 X29 .1175(515)
G01 X 28 .1175
G01 X27.0 Y.115.5 F20.0
G01 X25.0 Y.115.5
G01 X24.0 Y.112.5
G01 X23.0 Y.111
G01 X22.0 Y.111
G01 X20.0 Y.112
G01 X19.0 Y.112
G01 X18.0 Y.108
G01 X17.0 Y.105
G01 X16.0 Y.100
G01 X15.0 Y.094
G01 X14.0 Y.087.5
G01 X13.0 Y.081.5
G01 X12.0 Y.079.5
G01 X11.0 Y.074.5
G01 X10.0 Y.064
G01 X9.0 Y.051.5
G01 X8.0 Y.038
G01 X7.0 Y.025.5
G01 X6.0 Y.004.5
G01 X5.0 Y-.002
G01 X4.0 Y-.015.5
G01 X3.0 Y-.026
G01 X2.0 Y-.034
G01 X1.0 Y-.038.5
G01 X-.05 Y-.051
G01 Y-.1 F30.0
G00 X30.125
G00 Z1.0
M30
 
masonh said:
how many times do you run the tap in and out with the undersized tap,Sheldon?
Click to expand...
I do mine once.
The undersized radial tap is not really undersized. It's the right tap for shaft.
 
masonh said:
how many times do you run the tap in and out with the undersized tap,Sheldon?
Click to expand...
I bore the hole in the shaft, then put the tap in my tailstock. I cut power, and as the chuck is still spinning about half-speed, I slide the tailstock up and run the tap in very close to the end of the hole. I hand turn the last thread and then reverse it out. Blow it out with air, then very carefully start the tap in by hand, then grab it with the tailstock and do a second pass to make sure the threads are nice and clean.
I also like to rub a little beeswax on the tap before I use it.
 
i use the back gear on the lathe which is very slow,but i was wondering if i need to run it a few times.it seems like that undersized tap would make for an extremely tight fit.
 
masonh said:
i use the back gear on the lathe which is very slow,but i was wondering if i need to run it a few times.it seems like that undersized tap would make for an extremely tight fit.
Click to expand...
As the shaft is used, it will loosen up a little, but never to the point of being wobbly. A little wax on the pin/threads will help to break it in when it's new.
 
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