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Hand Threading Tools

• Hand threading tools are used to cut connection threads in pipe and fittings, both internally and externally.

Taps

• Taps are cutting tools designed to cut internal (female) threads.
• The threaded end of a tap has channels or flutes, which are cut lengthwise across the threads to form cutting edges, provide space for removal of chips, and admit cutting fluid to the cutting edges.
• The opposite end of a tap is usually square for receiving the tap wrench.
• Hand taps are usually made in sets of three: plug, taper, and bottoming taps.
• Plug taps are used for tapping through a workpiece and for general use.
• Taper taps are used to start a thread easily, for tapping a hole which goes through the workpiece, or for starting a blind hole.
• Bottoming taps are used to finish threads to full size after they have been started with a taper or plug tap.

International Standards Organization (ISO) Standard Metric Thread

• The ISO Standard Metric Thread has 25 thread sizes ranging from 1.6 mm to 100 mm diameter.
• Taps are identified with the letter M followed by the nominal diameter of the thread in millimeters times the pitch in millimeters.
• Example: M4 × 0.7 indicates a metric thread with a nominal diameter of 4 mm and a pitch of 0.7 mm.

Tap Drill Size

• Before a tap is used, the hole must be drilled to the correct size using a tap drill.
• The correct drill bit will leave the correct amount of material in the hole so the tap can cut a thread.
• The tap drill is always smaller than the tap to leave sufficient material for the tap to produce 75% of a full thread depth.
• Tap drill size can be calculated by subtracting the pitch of the thread from the nominal diameter of the thread.

Tapping Holes by Hand

• Steps to tap a hole by hand:
  • Select the correct tap and tap wrench for the job.
  • Apply a suitable cutting fluid to the tap (except for brass or cast iron).
  • Start the tap square with the hole.
  • Press down on the wrench equally to both sides and turn clockwise (right-hand thread) for approximately two turns.
  • Remove the tap wrench and check the tap at two positions to ensure it is perpendicular to the work surface.
  • If the tap is not square, back it out and start again.

Threading Dies

• Threading dies are used to cut external male threads on round workpieces.
• There are three types of threading dies: solid, round split, and adjustable.
• Solid dies are used to recut battered threads and clean rusted or otherwise clogged threads.
• Round split dies have a set screw that permits a certain amount of adjustment.
• Adjustable dies provide a relatively wide range of thread fits and are the most efficient.

Hand Threading Tools

• Hand threading tools are used to cut connection threads in pipe and fittings, both internally and externally.

Taps

• Taps are cutting tools designed to cut internal (female) threads.
• The threaded end of a tap has channels or flutes, which are cut lengthwise across the threads to form cutting edges, provide space for removal of chips, and admit cutting fluid to the cutting edges.
• The opposite end of a tap is usually square for receiving the tap wrench.
• Hand taps are usually made in sets of three: plug, taper, and bottoming taps.
• Plug taps are used for tapping through a workpiece and for general use.
• Taper taps are used to start a thread easily, for tapping a hole which goes through the workpiece, or for starting a blind hole.
• Bottoming taps are used to finish threads to full size after they have been started with a taper or plug tap.

International Standards Organization (ISO) Standard Metric Thread

• The ISO Standard Metric Thread has 25 thread sizes ranging from 1.6 mm to 100 mm diameter.
• Taps are identified with the letter M followed by the nominal diameter of the thread in millimeters times the pitch in millimeters.
• Example: M4 × 0.7 indicates a metric thread with a nominal diameter of 4 mm and a pitch of 0.7 mm.

Tap Drill Size

• Before a tap is used, the hole must be drilled to the correct size using a tap drill.
• The correct drill bit will leave the correct amount of material in the hole so the tap can cut a thread.
• The tap drill is always smaller than the tap to leave sufficient material for the tap to produce 75% of a full thread depth.
• Tap drill size can be calculated by subtracting the pitch of the thread from the nominal diameter of the thread.

Tapping Holes by Hand

• Steps to tap a hole by hand:
  • Select the correct tap and tap wrench for the job.
  • Apply a suitable cutting fluid to the tap (except for brass or cast iron).
  • Start the tap square with the hole.
  • Press down on the wrench equally to both sides and turn clockwise (right-hand thread) for approximately two turns.
  • Remove the tap wrench and check the tap at two positions to ensure it is perpendicular to the work surface.
  • If the tap is not square, back it out and start again.

Threading Dies

• Threading dies are used to cut external male threads on round workpieces.
• There are three types of threading dies: solid, round split, and adjustable.
• Solid dies are used to recut battered threads and clean rusted or otherwise clogged threads.
• Round split dies have a set screw that permits a certain amount of adjustment.
• Adjustable dies provide a relatively wide range of thread fits and are the most efficient.

Hand Threading Tools

• Hand threading tools are used to cut connection threads in pipe and fittings, both internally and externally.

Taps

• Taps are cutting tools designed to cut internal (female) threads.
• The threaded end of a tap has channels or flutes, which are cut lengthwise across the threads to form cutting edges, provide space for removal of chips, and admit cutting fluid to the cutting edges.
• The opposite end of a tap is usually square for receiving the tap wrench.
• Hand taps are usually made in sets of three: plug, taper, and bottoming taps.
• Plug taps are used for tapping through a workpiece and for general use.
• Taper taps are used to start a thread easily, for tapping a hole which goes through the workpiece, or for starting a blind hole.
• Bottoming taps are used to finish threads to full size after they have been started with a taper or plug tap.

International Standards Organization (ISO) Standard Metric Thread

• The ISO Standard Metric Thread has 25 thread sizes ranging from 1.6 mm to 100 mm diameter.
• Taps are identified with the letter M followed by the nominal diameter of the thread in millimeters times the pitch in millimeters.
• Example: M4 × 0.7 indicates a metric thread with a nominal diameter of 4 mm and a pitch of 0.7 mm.

Tap Drill Size

• Before a tap is used, the hole must be drilled to the correct size using a tap drill.
• The correct drill bit will leave the correct amount of material in the hole so the tap can cut a thread.
• The tap drill is always smaller than the tap to leave sufficient material for the tap to produce 75% of a full thread depth.
• Tap drill size can be calculated by subtracting the pitch of the thread from the nominal diameter of the thread.

Tapping Holes by Hand

• Steps to tap a hole by hand:
  • Select the correct tap and tap wrench for the job.
  • Apply a suitable cutting fluid to the tap (except for brass or cast iron).
  • Start the tap square with the hole.
  • Press down on the wrench equally to both sides and turn clockwise (right-hand thread) for approximately two turns.
  • Remove the tap wrench and check the tap at two positions to ensure it is perpendicular to the work surface.
  • If the tap is not square, back it out and start again.

Threading Dies

• Threading dies are used to cut external male threads on round workpieces.
• There are three types of threading dies: solid, round split, and adjustable.
• Solid dies are used to recut battered threads and clean rusted or otherwise clogged threads.
• Round split dies have a set screw that permits a certain amount of adjustment.
• Adjustable dies provide a relatively wide range of thread fits and are the most efficient.

Hand Threading Tools

• Hand threading tools are used to cut connection threads in pipe and fittings, both internally and externally.

Taps

• Taps are cutting tools designed to cut internal (female) threads.
• The threaded end of a tap has channels or flutes, which are cut lengthwise across the threads to form cutting edges, provide space for removal of chips, and admit cutting fluid to the cutting edges.
• The opposite end of a tap is usually square for receiving the tap wrench.
• Hand taps are usually made in sets of three: plug, taper, and bottoming taps.
• Plug taps are used for tapping through a workpiece and for general use.
• Taper taps are used to start a thread easily, for tapping a hole which goes through the workpiece, or for starting a blind hole.
• Bottoming taps are used to finish threads to full size after they have been started with a taper or plug tap.

International Standards Organization (ISO) Standard Metric Thread

• The ISO Standard Metric Thread has 25 thread sizes ranging from 1.6 mm to 100 mm diameter.
• Taps are identified with the letter M followed by the nominal diameter of the thread in millimeters times the pitch in millimeters.
• Example: M4 × 0.7 indicates a metric thread with a nominal diameter of 4 mm and a pitch of 0.7 mm.

Tap Drill Size

• Before a tap is used, the hole must be drilled to the correct size using a tap drill.
• The correct drill bit will leave the correct amount of material in the hole so the tap can cut a thread.
• The tap drill is always smaller than the tap to leave sufficient material for the tap to produce 75% of a full thread depth.
• Tap drill size can be calculated by subtracting the pitch of the thread from the nominal diameter of the thread.

Tapping Holes by Hand

• Steps to tap a hole by hand:
  • Select the correct tap and tap wrench for the job.
  • Apply a suitable cutting fluid to the tap (except for brass or cast iron).
  • Start the tap square with the hole.
  • Press down on the wrench equally to both sides and turn clockwise (right-hand thread) for approximately two turns.
  • Remove the tap wrench and check the tap at two positions to ensure it is perpendicular to the work surface.
  • If the tap is not square, back it out and start again.

Threading Dies

• Threading dies are used to cut external male threads on round workpieces.
• There are three types of threading dies: solid, round split, and adjustable.
• Solid dies are used to recut battered threads and clean rusted or otherwise clogged threads.
• Round split dies have a set screw that permits a certain amount of adjustment.
• Adjustable dies provide a relatively wide range of thread fits and are the most efficient.

This quiz covers the basics of hand threading tools and taps, including their uses and functionality in cutting internal and external threads in pipes and fittings.