Goliath Threading Tools 1.1/2″ x 8 BSF Bottoming HSS Tap – Goliath

Description

1.1/2″ x 8 BSF Bottoming HSS Tap – Goliath
HSS Bright Finish BSF Hand and Machine Bottoming Tap.
HSS Straight Flute Short Machine and Hand Taps.
These general purpose taps are ideal for creating new threads in a wide variety of materials.
Goliath HSS taps provide a high hardness to toughness ratio, compressive and tensile strength, good abrasion resistance and resistance to micro-chipping, ensuring a long tool life.
British Standard Fine thread form was based upon the British Standard Whitworth (BSW) but has a finer thread (more threads per inch for a given diameter).
The thread form was first introduced in 1908 and is specified in BS84:1956.
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 or where wall thickness demands a fine pitch.
Bottoming Taps have a lead of two threads and are used to ensure minimum thread run-out when tapping to the bottom of a blind hole.
Bottoming Taps are typically preceded by the use of a Taper or Intermediate Tap.
Manufactured from HSS this general purpose tap is designed for use in medium tensile materials and is for hand or general machine use.
Category: Goliath Threading Tools, Taps Hand & Machine, HSS Straight Flute Short Machine and Hand Taps, BSF
Drill Diameter (mm): 34.5
Overall Length (mm): 170
Pitch (tpi): 8
Lead: Bottoming