Tapping

2010-12-27T15:29:54Z

Metalmeltr:

[[Image:Tap_set.gif|right|thumb|250ps|A set of pipe taps]]'''Tapping''' is the process of cutting [[thread]]s on the inside diameter of a hole with a tool called a tap. It is used to thread holes for mounting:
*[[Pressure gauge]]s
*[[Fuel meter]]s
*Electrodes (Bolts)
*[[Safety valve]]s
*Other

==='''Types of Threads'''===

There are a few different thread systems that are used in spudgun construction

*NPT (National Pipe Taper)
*BSP (British Standard Pipe)
*NF (National Fine)
*NC (National Course)

==='''The Process for metal'''===

#Mark and drill an appropriately sized hole
#*The hole should be in an area where fittings or pipe overlap (double thickness)[[Image:ReltonRapidTap.jpg|right|thumb|An appropriate cutting fluid for tapping holes. It is usually available at tool stores. ]]
#*Find correct hole size with a [http://www.engineersedge.com/tap_drill_chart.htm Tap/Drill Chart]
#Insert the tap into the tap wrench
#*If you don't have a tap wrench, a normal crescent wrench can be used
#Cut the threads
#*Be careful to keep the tap straight or you will end up with crooked threads
#*When tapping plastic (or any other material) be sure to use an appropriate [http://www.relton.com/html/cutfluid2003.html cutting fluid] such as RapidTap® made by [http://www.relton.com/ Relton].
#*Apply downward pressure while slowly turning the tap clockwise 180 degrees, then back out 90 degrees counterclockwise to clear the chips
#*For tapered threads, stop as soon as the entire length of the hole is threaded

'''Process for plastic'''

When taping into plastic a pipe tap is unessasary.

#Drill hole slightly smaller than your fitting.
#Hold your fitting with a wrench and slowly turn it into the plastic, be sure to keep it straight.
#After the fitting is threaded in completly remove the fitting.
#Wrap teflon tape around the threads
#Thread the fitting back into your hole.

== external links ==
[http://www.wikihow.com/Use-a-Tap wikihow's article on tapping]
[[Category:Construction methods]]

Tapping

2010-12-27T15:22:41Z

Metalmeltr:

[[Image:Tap_set.gif|right|thumb|250ps|A set of pipe taps]]'''Tapping''' is the process of cutting [[thread]]s on the inside diameter of a hole with a tool called a tap. It is used to thread holes for mounting:
*[[Pressure gauge]]s
*[[Fuel meter]]s
*Electrodes (Bolts)
*[[Safety valve]]s
*Other

==='''Types of Threads'''===

There are a few different thread systems that are used in spudgun construction

*NPT (National Pipe Taper)
*BSP (British Standard Pipe)
*NF (National Fine)
*NC (National Course)

==='''The Process'''===
#For metal'''Bold text'''
#Mark and drill an appropriately sized hole
#*The hole should be in an area where fittings or pipe overlap (double thickness)[[Image:ReltonRapidTap.jpg|right|thumb|An appropriate cutting fluid for tapping holes. It is usually available at tool stores. ]]
#*Find correct hole size with a [http://www.engineersedge.com/tap_drill_chart.htm Tap/Drill Chart]
#Insert the tap into the tap wrench
#*If you don't have a tap wrench, a normal crescent wrench can be used
#Cut the threads
#*Be careful to keep the tap straight or you will end up with crooked threads
#*When tapping plastic (or any other material) be sure to use an appropriate [http://www.relton.com/html/cutfluid2003.html cutting fluid] such as RapidTap® made by [http://www.relton.com/ Relton].
#*Apply downward pressure while slowly turning the tap clockwise 180 degrees, then back out 90 degrees counterclockwise to clear the chips
#*For tapered threads, stop as soon as the entire length of the hole is threaded

== external links ==
[http://www.wikihow.com/Use-a-Tap wikihow's article on tapping]
[[Category:Construction methods]]

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Tapping

Tapping