Taps and Dies - Revision history

DT Online: Added Amazon Link

2017-12-13T11:56:50Z

Added Amazon Link

← Older revision		Revision as of 11:56, 13 December 2017
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	~~[[File:~~ISO and UTS Thread Dimensions.svg~~\|right\|~~400px~~\|ISO and UTS Thread Dimensions]]~~		<div class="floatright"><dtamazon type="search" search="Taps and Dies"><img alt="ISO and UTS Thread Dimensions" src="https://upload.wikimedia.org/wikipedia/commons/thumb/4/4b/ISO_and_UTS_Thread_Dimensions.svg/400px-ISO_and_UTS_Thread_Dimensions.svg.png" width="400" height="270" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/4/4b/ISO_and_UTS_Thread_Dimensions.svg/600px-ISO_and_UTS_Thread_Dimensions.svg.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/4/4b/ISO_and_UTS_Thread_Dimensions.svg/800px-ISO_and_UTS_Thread_Dimensions.svg.png 2x" /></a></dtamazon></div>
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DT Online: Added Tailstock Die Holders

2017-11-02T12:56:55Z

Added Tailstock Die Holders

← Older revision		Revision as of 12:56, 2 November 2017
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	\| [https://en.wikipedia.org/wiki/Tap_and_die#Die '''Circular Split Dies'''] are held in a '''Die Stock''' so that they can be turned to cut an external thread on a bar ''(e.g. to make a '''[[Nuts, Bolts and Washers\|Bolt]]''')''. The '''Die Stock''' has three adjustment screws. To start a thread, the '''Die''' is opened to its widest by the central screw which is driven into the adjustment split. Subsequently, successive cuts are taken with the centre screw progressively slackened and the outer screws tightened, until a close fitting thread is achieved.		\| [https://en.wikipedia.org/wiki/Tap_and_die#Die '''Circular Split Dies'''] are held in a '''Die Stock''' so that they can be turned to cut an external thread on a bar ''(e.g. to make a '''[[Nuts, Bolts and Washers\|Bolt]]''')''. The '''Die Stock''' has three adjustment screws. To start a thread, the '''Die''' is opened to its widest by the central screw which is driven into the adjustment split. Subsequently, successive cuts are taken with the centre screw progressively slackened and the outer screws tightened, until a close fitting thread is achieved.
	\| [[File:DieStock.png\|200px\|right]]		\| [[File:DieStock.png\|200px\|right]]
			\|-
			\| A '''[[Tailstock Die Holder]]''' makes good use of the true alignment between a '''[[Centre Lathe]]''' '''Tailstock''' and '''Chuck'''. They are fitted with a [https://en.wikipedia.org/wiki/Machine_taper#Morse '''Morse Taper'''] such that they can be gripped accurately in the tailstock quill. With the '''power off''' the lathe chuck is held by hand ''(or the lathe placed in a low gear, for greater turning resistance, or its spindle locked)'', the handles of the '''Tailstock Die Holder''' can be rotated forwards and backwards to produce concentric threads on the bar stock.
			\| [[File:TailstockDieHolder.png\|200px\|right]]
	\|}		\|}
			----
			<span style="color: red">'''Safety Point!'''
			'''Tailstock Die Holders''' are designed for thread cutting only by hand, using the lathe for thread alignment, but without using the lathe power. '''NEVER''' turn on the lathe power while holding the '''Die Holder''' handles. This can be extremely dangerous, even for short lengths of thread.
			</span>
			----

	{{Threading Buyers Guide}}		{{Threading Buyers Guide}}

DT Online: Added Template

2016-09-12T17:28:48Z

Added Template

← Older revision		Revision as of 17:28, 12 September 2016
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	~~The most common way of cutting '''~~[[~~Nuts, Bolts~~ and ~~Washers~~\|~~Screwthreads]~~]~~''' by hand is by using [https://en.wikipedia.org/wiki/Tap_and_die '''Taps and Dies'''~~].		[[File:ISO and UTS Thread Dimensions.svg\|right\|400px\|ISO and UTS Thread Dimensions]]
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			=====Description=====

	~~__TOC__~~		The most common way of cutting '''[[Nuts, Bolts and Washers\|Screwthreads]]''' by hand is by using [https://en.wikipedia.org/wiki/Tap_and_die '''Taps and Dies'''].


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	\| [[File:DieStock.png\|200px\|right]]		\| [[File:DieStock.png\|200px\|right]]
	\|}		\|}

			{{Threading Buyers Guide}}


	[[Category:Threading Tools]]		[[Category:Threading Tools]]

DT Online: Corrected Link

2016-02-20T18:26:07Z

Corrected Link

← Older revision		Revision as of 18:26, 20 February 2016
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	{\|		{\|
	\|-		\|-
	\| Bar type [https://en.wikipedia.org/wiki/Tap_wrench '''Tap Wrenches'''] are the most commonly used tool to hold '''Taps''' and turn them to cut a screw thread. Usually , they have [https://en.wikipedia.org/wiki/Hardened_steel hardened steel] jaws and '''[[Knurled]]''' handles for extra grip. Long handles provide the '''[[:Category:Levers\|Leverage]]''' required, especially when using larger diameter taps.		\| Bar type [https://en.wikipedia.org/wiki/Tap_wrench '''Tap Wrenches'''] are the most commonly used tool to hold '''Taps''' and turn them to cut a screw thread. Usually , they have [https://en.wikipedia.org/wiki/Hardened_steel hardened steel] jaws and '''[[Knurling\|Knurled]]''' handles for extra grip. Long handles provide the '''[[:Category:Levers\|Leverage]]''' required, especially when using larger diameter taps.

DT Online: Corrected Link

2016-02-20T18:22:41Z

Corrected Link

← Older revision		Revision as of 18:22, 20 February 2016
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	\| [[File:TapWrenches.png\|250px\|right]]		\| [[File:TapWrenches.png\|250px\|right]]
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	\| [https://en.wikipedia.org/wiki/Tap_wrench '''‘T Handle’'''] type wrenches hold the tap in a [https://en.wikipedia.org/wiki/Collet '''Collet Chuck'''] which is tightened by twisting a '''[[Knurled]]''' nut. They can provide more ‘feel’ when cutting smaller threads and those with a '''[[Ratchet]]''' action such that they can rotate forwards and backwards, are ideal for use in confined spaces.		\| [https://en.wikipedia.org/wiki/Tap_wrench '''‘T Handle’'''] type wrenches hold the tap in a [https://en.wikipedia.org/wiki/Collet '''Collet Chuck'''] which is tightened by twisting a '''[[Knurling\|Knurled]]''' nut. They can provide more ‘feel’ when cutting smaller threads and those with a '''[[Ratchet]]''' action such that they can rotate forwards and backwards, are ideal for use in confined spaces.
	\| [[File:TapWrench.png\|200px\|right]]		\| [[File:TapWrench.png\|200px\|right]]
	\|}		\|}

DT Online at 16:54, 20 February 2016

2016-02-20T16:54:54Z

← Older revision		Revision as of 16:54, 20 February 2016
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	All '''Tap Wrenches''' can also be used with '''[[Reamers]]''', [https://en.wikipedia.org/wiki/Screw_extractor '''Screw Extractors'''] and other tools with a square shank.		All '''Tap Wrenches''' can also be used with '''[[Reamer\|Reamers]]''', [https://en.wikipedia.org/wiki/Screw_extractor '''Screw Extractors'''] and other tools with a square shank.

DT Online: Created Article

2015-11-15T13:50:15Z

Created Article

New page

The most common way of cutting '''[[Nuts, Bolts and Washers|Screwthreads]]''' by hand is by using [https://en.wikipedia.org/wiki/Tap_and_die '''Taps and Dies'''].

__TOC__

=====Taps=====
[[File:Taps2.png|200px|right]]
[https://en.wikipedia.org/wiki/Tap_and_die#Tap '''Taps'''] are held in a [https://en.wikipedia.org/wiki/Tap_wrench '''Tap Wrench'''] to cut a thread inside a drilled hole. Thread sizes are given as the diameter of the bar on which the external thread would be cut ''(i.e. the bolt diameter)''. It follows that the holes in which matching internal threads are cut must be less than the nominal thread sizes. They are known generally as the [https://en.wikipedia.org/wiki/Tap_and_die#Tap_drill_sizes '''Tapping Sizes'''] and are given in reference tables.

'''Taps''' are available in sets of three: Taper, 2nd Taper and Bottoming or Plug Taps ''(these have no taper at all)''. The '''Taper Tap''' is used first to get the thread started and in thin materials may be the only one needed. '''Bottoming''' or '''Plug Taps''' are used to continue threads in thicker materials or to finish a thread to the bottom of a ''blind'' hole ''(i.e. a hole that does not go right through the material)''.

=====Dies=====
[[File:SplitDie.png|150px|right]]
The most common [https://en.wikipedia.org/wiki/Tap_and_die#Die '''Dies'''] are [https://en.wikipedia.org/wiki/Tap_and_die#Die '''Circular Split Dies'''] held in a '''Die Stock''' which has three adjusting screws: one screwed into the split to open the '''Die''' to its largest size, and two others either side, which can close up the '''Die''' once the central screw is slackened. The '''Die''' itself is also tapered on one side and, in this way, a single '''Circular Split Die''' can be opened up to start a thread then adjusted down to cut a thread such that it runs smoothly inside a nut or threaded hole and without too much slack. The end of the bar which is to receive the thread should always be slightly chamfered to make starting easier and if this is done accurately, on a '''[[Centre Lathe|lathe]]''' for example, the [https://en.wikipedia.org/wiki/Chamfer '''chamfer'''] will also help to ensure the thread starts '''[[Squareness|square]]''' to the bar to avoid '''''drunken threads'''''.

=====Cutting a Thread=====
When cutting a screwthread with either a '''Tap''' or a '''Die''' it is commonly accepted practice to advance one turn forwards then half a turn in reverse to break off the chip being cut. It is more important however, to '''''feel''''' the cutting action and gain a sense of when to cut and when to go backwards to cut off the chip - this may vary with the size of thread being cut and choice of material. Gaining such a '''''feel''''' for the cutting action is most important when using '''Taps''' to cut a thread inside a ''blind hole''. The danger is that if too much force is applied as the '''Bottoming Tap''' reaches the bottom of the hole, it may break. Note also that chips of metal will fall to the bottom of the hole during the cutting operation and these need frequently to be cleared out.

=====Tap Wrenches=====
{|
|-
| Bar type [https://en.wikipedia.org/wiki/Tap_wrench '''Tap Wrenches'''] are the most commonly used tool to hold '''Taps''' and turn them to cut a screw thread. Usually , they have [https://en.wikipedia.org/wiki/Hardened_steel hardened steel] jaws and '''[[Knurled]]''' handles for extra grip. Long handles provide the '''[[:Category:Levers|Leverage]]''' required, especially when using larger diameter taps.

A simple, but quite functional '''Tap Wrench''' can be made by filing ‘V’ notches into two pieces of, say, 12mm square bar stock and screwing them together as shown.
| [[File:TapWrenches.png|250px|right]]
|-
| [https://en.wikipedia.org/wiki/Tap_wrench '''‘T Handle’'''] type wrenches hold the tap in a [https://en.wikipedia.org/wiki/Collet '''Collet Chuck'''] which is tightened by twisting a '''[[Knurled]]''' nut. They can provide more ‘feel’ when cutting smaller threads and those with a '''[[Ratchet]]''' action such that they can rotate forwards and backwards, are ideal for use in confined spaces.
| [[File:TapWrench.png|200px|right]]
|}

All '''Tap Wrenches''' can also be used with '''[[Reamers]]''', [https://en.wikipedia.org/wiki/Screw_extractor '''Screw Extractors'''] and other tools with a square shank.

=====Diestocks=====
{|
|-
| [https://en.wikipedia.org/wiki/Tap_and_die#Die '''Circular Split Dies'''] are held in a '''Die Stock''' so that they can be turned to cut an external thread on a bar ''(e.g. to make a '''[[Nuts, Bolts and Washers|Bolt]]''')''. The '''Die Stock''' has three adjustment screws. To start a thread, the '''Die''' is opened to its widest by the central screw which is driven into the adjustment split. Subsequently, successive cuts are taken with the centre screw progressively slackened and the outer screws tightened, until a close fitting thread is achieved.
| [[File:DieStock.png|200px|right]]
|}

[[Category:Threading Tools]]