Goliath Threading Tools 1″ x 12 UNF Spiral Flute HSS-Co5 Tap – Goliath

Description

1″ x 12 UNF Spiral Flute HSS-Co5 Tap – Goliath
HSS-Co (Cobalt) Bright Finish UNF Spiral Flute Machine Tap.
HSS-Co Spiral Flute Taps.
Spiral Flute taps are designed primarily for machine tapping of blind holes.
They are used to the best advantage in materials that produce long continuous chips.
The right hand spiral forces the swarf out of the hole and prevents the chips from clogging at the bottom of the hole or in the flutes, which could cause tap breakage or spoiled threads.
Unified National Fine (UNF) thread form was introduced in 1948 as an attempt to standardise thread forms in the USA, Canada and the UK.
The thread profile of UNF is the same as for metric threads and is described in the JIS B0206 standard.
The thread is described by its major diameter and the number of threads per inch of length (TPI).
When used on external threads this series has greater tensile stress area than coarse threads of the same size.
Fine series threads will resist stripping out better than coarse threads in areas where the external and mating internal threads are subjected to loads equal to or greater than the capacity of the screw or bolt.
Fine threads are also used where the length of engagement is limited 1-1/4 or where wall thickness demands a fine pitch.
Manufactured from HSS-Co5.
Category: Goliath Threading Tools, Taps Hand & Machine, HSS-Co5 Spiral Flute Taps, UNF
Drill Diameter (mm): 23.25
Overall Length (mm): 120
Pitch (tpi): 12