I need to duplicate this piece and am not sure best way to tap the 3/8-24 threads in 316 stainless. Pics attached of what I am trying to make (pic 1835 and 1836). Here are the particulars of what I tried so far. End result was tap broke when program reversed spindle to retract tap.
Now that I laid out what I did, which probably has too many errors to count, can you guys provide advice on how I should have done it to be successful?
Thanks
- Material: 316 Stainless
- Drill Size: 0.3543" from Guhring. Hole drilled 1.3" deep from face.
- Tap: 3/8-24 OSG form tap. Model #1400138306
- Desired depth of threads is 1.15". Note this is deeper than the 0.752" of thread length on the form tap
- Haas TL-1 with tension/compression holder (no rigid tapping option)
- RPM = 200
- Manually applied cutting oil to tap before starting cycle
- Feeding and Retracting with G01 commands.
- 10% reduced feed rate (0.0375in/rev) going in, full feed rate (0.0416in/rev) on retract
- Z set to 90% of desired depth = 1.035" (Desired depth of 1.15")
Now that I laid out what I did, which probably has too many errors to count, can you guys provide advice on how I should have done it to be successful?
Thanks