Straight Tapping is too tight and deforms the outer surface
- 13/64 =, 5.1594
Best result =
- Drill out M5 using 13/64
- Tap using cordless drill, tap is Genuine Sutton Tools Tap T385 M6x1 6H
- STRAIGHT FLUTE N ISO529 Inter HSS
- Not cheap but repeatable results
- I have both CRC Cutting oil & WD40 ‘WORX’ I get much better results with ‘WORX’
Also Thread rolling taps