Jig (tool)

Short description: Custom-made tool used to control the location and/or motion of another tool

A bicycle frame building jig

A jig is a type of custom-made tool used to control the location and/or motion of parts or other tools.

## Contents

* 1 Description
* 2 Drill jig
* 3 PCB jig
* 4 Jewelry jig
* 5 See also
* 6 References
* 6.1 Bibliography

## Description

Device with grooves and chucks

A jig's primary purpose is to provide repeatability, accuracy, and interchangeability in the manufacturing of products.[1]

An example of a jig is when a key is duplicated; the original is used as a jig so the new key can have the same path as the old one. Since the advent of automation and computer numerical controlled (CNC) machines, jigs are often not required because the tool path is digitally programmed and stored in memory. Jigs may be made for reforming plastics.

Jigs or templates have been known long before the industrial age. There are many types of jigs, and each one is custom-tailored to do a specific job.

## Drill jig

A drill jig is a type of jig that expedites repetitive hole center location on multiple interchangeable parts by acting as a template to guide the twist drill or other boring device into the precise location of each intended hole center. In metalworking practice, typically a hardened drill bushing lines each hole on the jig plate to keep the tool from damaging the jig.

Drill jigs started falling into disuse with the invention of the jig borer.

Since the widespread penetration of the manufacturing industry by CNC machine tools, in which servo controls are capable of moving the tool to the correct location automatically, the need for drill jigs (and for the jobs of the drill press operators who used them) is much less than it used to be.

## PCB jig

Main article: Engineering:In-circuit test

Printed circuit board (PCB) jigs are used to test PCBs. They have a dump board inside the jig which can find faults in the PCBs.

## Jewelry jig

A jig used in making jewelry, a specific type of jig, is a plate or open frame for holding work and helping to shape jewelry components made out of wire or small sheets of metal. A jig in the jewelry making application is used to help establish a pattern for use in shaping the wire or sheets of metal. In the jewelry application, the shaping of the metal is done by hand or with simple hand tools like a hammer.

## See also

* Jig grinder
* Staircase jig
* Sharpening jig
* Tapering jig

## References

1. ↑ Henriksen 1973, p. 1.

### Bibliography

* Henriksen, Erik Karl (1973), Jig and fixture design manual, Industrial Press, ISBN 978-0-8311-1098-7, https://books.google.com/books?id=OX9hspFzRAsC.

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* t
* e

Measuring and alignment tools

* Architect's scale
* Beam compass
* Calipers
* Chalk box
* Combination square
* Compass
* Coordinate-measuring machine
* Diagonal scale
* Drafting machine
* Engineer's scale
* Flat spline
* French curve
* Gunter's chain
* Jig
* Laser level
* Laser line level
* Laser measuring tool
* Lesbian rule
* Measuring rod
* Meterstick
* Micrometer
* Plumb-bob
* Protractor
* Radius gauge
* Ruler
* Set square
* Skirret
* Sliding T bevel
* Speed square
* Spirit level
* Steel square
* Stencil
* Straightedge
* T-square
* Tape measure
* Theodolite
* Thread pitch gauge
* Try square
* Vernier scale
* Vise
* Weighing scale
* Winding sticks

Types of tools
Cleaning
Cutting and abrasive
Forestry
Garden
Hand
Kitchen
Machine and metalworking
Masonry
Measuring and alignment
Mining
Power
Textile
Woodworking

* v
* t
* e

Metalworking

* v
* t
* e

Machining and computing

Computer-aided
engineering|

* 2.5D
* CAD
* CAM
* G-code
* Numerical control (NC and CNC)
* Stewart platform

Drilling and
threading|

* Die head
* Drill
* Drill bit
* Drill bit shank
* Drill bit sizes
* Drilling
* List of drill and tap sizes
* Tap and die
* Tap wrench
* Threading

Grinding and
lapping|

* Abrasive
* Abrasive machining
* Angle grinder
* Bench grinder
* Coated abrasive
* Cylindrical grinder
* Diamond plate
* Flick grinder
* Grinding
* Grinding dresser
* Grinding machine
* Grinding wheel
* Jig grinder
* Lapping
* Sanding
* Sharpening stone
* Spark testing
* Surface grinder
* Tool and cutter grinder

Machining|

* Boring
* Broaching
* Electrical discharge machining
* Electrochemical machining
* Electron-beam machining
* End mill
* Engraving
* Facing
* Hobbing
* Jig borer
* Machine tool
* Machining
* Metal lathe
* Milling cutter
* Milling machine
* Pantograph
* Photochemical machining
* Planer
* Reamer
* Rotary transfer machine
* Shaper
* Skiving machine
* Turning
* Ultrasonic machining

Machine tools|

* Angle plate
* Chuck
* Collet
* Fixture
* Indexing head
* Jig
* Lathe center
* Machine taper
* Magnetic base
* Mandrel
* Rotary table
* Wiggler

Terminology|

* Cutting fluid
* Machining vibrations
* Speeds and feeds
* Swarf
* Tolerance
* Tool and die making
* Tramp oil

* Casting
* Fabrication
* Forming
* Jewellery
* Machining
* Metallurgy
* Smithing
* Tools and terminology
* Welding

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