Whitworth Screw stock taps, dies, wrenches, die wrench and spanner

Made:
1850-1857 in Manchester urban district
maker:
Joseph Whitworth and Company Limited
Tap wrench by Joseph Whitworth and Company, Manchester, 1850-1857. General view. Grey background Tap wrench by Joseph Whitworth and Company, Manchester, 1850-1857. Close up detail. Black background

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Tap wrench by Joseph Whitworth and Company, Manchester, 1850-1857. General view. Grey background
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Tap wrench by Joseph Whitworth and Company, Manchester, 1850-1857. Close up detail. Black background
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Whitworth Screw stock taps, dies, wrenches, die wrench and spanner: 5 sets of taps (4 in each set), 5 sets of dies (3 in each), 3 wrenches for taps, a die wrench and 1 spanner.

One of Whitworth’s important legacies was an agreed national specification of screw-thread shape and pitch, related to the diameter of the bolt; before his work, each machine shop used a special thread of its own. Starting in 1841, his standard became generally accepted and by 1860 it had become a British Standards Institute specification remaining in general use until well into the 1960s.

Details

Category:
Hand and Machine Tools
Object Number:
1857-8
type:
tap wrench
taxonomy:
  • furnishing and equipment
  • tools & equipment
credit:
Joseph Whitworth and Co.