Threading Application Guide

TopThread™ Threading

TopThread Square Shank Toolholder Sizes: Cresting (Full Profi le):

  • Metric — 10–32mm UN TPI of 32–7

External Threading ISO 1,5–3,0mm pitch 60° Partial Profi le — Flat Top

(NTF and NTK): UN 44–4.5 TPI ISO 0,6–5,5mm pitch

TopThread Boring Bar Diameters: Cresting (Full Profi le):

  • Metric — 10–50mm UN 16–8 TPI

Internal Threading Minimum bore —11,5mm ISO 1,5–3,0mm pitch

  • Steel

60° Partial Profi le — Flat Top

(NT-1L, NTF, and NTK): UN 24–4.5 TPI ISO 1,0–5,5mm pitch