View source for Mitre Joint

[[File:MitreJoint.png|150px|right]]
A [https://en.wikipedia.org/wiki/Miter_joint '''Mitre Joint'''] is created by cutting the joining pieces at 45 deg. They are essentially a '''[[Butt Joint]]''' and therefore quite weak but can be strengthened by reinforcement with '''[[Keys, Tongues and Slip Feathers|Keys]]'''  ''(i.e. thin pieces of veneer or similar set into sawn grooves)''.
'''[[Keys, Tongues and Slip Feathers|Keys]]''' may be made from the same timber or a contrasting timber ''(or another material)'' can create a decorative effect.
[[File:KeyedMitres.png|750px|left]]
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[[File:MitreClosingRebateGroove.png|400px|right]]
'''Mitre Joints''' are most commonly seen in picture frames but are useful in any situation where a [https://en.wikipedia.org/wiki/Rabbet '''Rebate'''], [https://en.wikipedia.org/wiki/Groove_%28joinery%29 '''Groove'''] or [https://en.wikipedia.org/wiki/Molding_%28decorative%29 '''Moulding'''] has to be returned around a corner.


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<span style="color: green">'''Note:'''
Several wood joints may include a mitre on one of the faces, especially if there is a need to return mouldings of some kind ''(e.g. '''[[Bridle]]''' and '''[[Dovetail]]'''.
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[[File:CornerLapMarkingKnife.png|150px|right]]
It is important to ensure that the ends of timber forming the joint are cut accurately and '''[[Squareness|Square]]'''. This can be achieved ''off the saw'' if care is taken using a '''[[Tenon Saw]]''' and a '''[[Mitre Box]]''' for example. Alternatively a '''[[Precision Mitre Saw]]''' or '''[[Radial Arm Saw]]''' will produce more predictable results. In all cases, scribing the joint lines with a '''[[Marking Knife]]''' will help to ensure clean edges at the joint face.


[[File:CuttingKeySlots.png|550px|left]]
'''Grooves''' for '''[[Keys, Tongues and Slip Feathers|Loose Tongues]]''' can be cut using a '''[[Planes|Plough Plane]]''' and '''Slots''' for '''[[Keys, Tongues and Slip Feathers|Keys]]''' cut by hand using a '''[[Tenon Saw]]''' and '''[[Coping Saw]]''' then '''''pared''''' to the line using '''[[Chisels]]'''. Alternatively a '''[[Router]]''' with suitable cutters can be used for both tasks.
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<span style="color: green">'''Note:'''
The work-piece is turned around in the '''[[Carpenters Vice|Vice]]''' to ensure the '''[[Tenon Saw]]''' cuts vertically and the waste is on the ''blind side'' of the saw. Note also the scrap wood behind the work-piece to avoid splitting out when '''paring''' to the line with the chisel.
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<span style="color: red">'''Safety Point!'''
Students may only use a '''[[Router]]''' or '''[[Radial Arm Saw]]''' when they have been trained and assessed and the assessment shows that they are competent, and are under appropriate supervision of specifically trained staff.
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[[Category:Wood Joints]]