ART
BEAUTY & WELLNESS
CRAFT
CULTURE & HISTORY
ENTERTAINMENT
ENVIRONMENT
FOOD & DRINKS
REVERSE ENGINEERING
SCIENCES
SPORTS
TECHNOLOGY
WEARABLES
Caliper: Spring-Wire Calipers with a Sliding Loop (Boy Mechanic, 1919)
Quick calipers from one length of spring wire, bent double into two legs, with a loop of heavy wire round the middle that slides along to set the opening.
Variable: points turned in to gauge outside diameters, or out to gauge bores.
Source: The Boy Mechanic, Book 3 (1919), p. 373. Picture: the book's sketch.
Beginner
Unknown
Instructions
1
1
Bend the legs
Bend the legs
Take about 15 in of spring wire and bend it as in the sketch: a round bend at one end and two legs whose tips turn inward (for outside diameters) or outward (for inside ones).
Materials for this step:
Spring Steel Wire1 15 inTools needed:
Tin Snips
Bench Vise2
2
Fit the sliding loop
Fit the sliding loop
Fasten a loop of heavy wire round the middle so it slides back and forth along both legs. Sliding it toward the tips closes the calipers; sliding it back lets them spring open.
Materials for this step:
Iron Wire1 heavy wire loopTools needed:
Tin SnipsThis blueprint makes
CC0 Public Domain
This blueprint is released under CC0. You are free to copy, modify, distribute, and use this work for any purpose, without asking permission.
Support the Maker by purchasing products through their Blueprint where they earn a Maker Commission set by Vendors, or create a new iteration of this Blueprint and include it as a connection in your own Blueprint to share revenue.