Tapping 2020 R5mm

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