What are NPT dies?
National Pipe Taper Dies (NPT) are appropriate for threading a wide variety of materials both ferrous and non-ferrous.
What size die do I need for 1/2 pipe?
this 1/2″ pipe die is 1.438″ across flats, so one can use a 1 7/16″ die stock or 1 7/16″ socket wrench, or equiv. open end or box wrench. A socket would be best for tight quarters as one can turn it with a ratchet and various extenders.
What is a pipe thread die?
The drop heads and the pipe threading die heads are the parts you use to surround the pipe and hold the dies in place while you perform the threading. You should think of the dies as the teeth of the operation. They are blades that slice the threads into the pipe.
How is NPT thread calculated?
The taper rate for all NPT threads is 1 inch of diameter in 16 inches of length ( 3⁄4 inch per foot or 62.5 millimeters per meter) measured by the change of diameter (of the pipe thread) over distance of thread. The angle between the taper and the center axis of the pipe is tan−1( 1⁄32) ≈ 1.7833° ≈ 1° 47′.
How does a pipe die work?
A ratcheting pipe threader consists of a long ratcheting handle that holds a circular die head at one end, which is a ring with several sets of teeth inside of it that cut the threads. When you ratchet the handle, the die head spins onto the end of the pipe, cutting the threads as it goes on.
What is a pipe die stock used for?
What is Die Stock. This is a device used to hold the die during external threading. Generally die stock is made of cast steel, mild steel, or cast iron.
Are NPT threads tapered?
The best known and most widely used connection where the pipe thread provides both the mechanical joint and the hydraulic seal is the American National Pipe Tapered Thread, or NPT. NPT has a tapered male and female thread which seals with Teflon tape or jointing compound.
Is FIP thread tapered?
NPT or NPS (national pipe tapered or straight): Most common in North America. MIP or FIP (male or female iron pipe): Same thread dimensions as NPT. BSP(T) or BSP(S) (British standard pipe tapered or straight): Most common in Europe. Compression: A unique threaded fitting that does not mate with other thread types.
How can I tell what NPT threads I have?
To determine the NPT size, with a caliper, measure the diameter of the 2nd or 3rd thread on your pipe, fitting or valve as shown below. Find the caliper measurement in the chart and cross reference the nominal NPT pipe size. Don’t get confused, the actual measurement is not the same as the NPT pipe size.
How do you use a NPT die head?
Use them to cut NPT threads in steel pipe and conduit by hand. Grip compatible die heads to cut external pipe and conduit threads by hand. Use these dies with Ridgid pipe and conduit threader die heads on Ridgid pipe and conduit threaders. The teeth on these high-speed steel dies are designed to cut through stainless steel.
What is a high speed NPT die?
NPT RH High-Speed Pipe Dies are designed for clean, accurate threading of stainless steel. These super-efficient high-speed NPT dies are designed for 1 in. to 2 in. nominal pipe. The right-hand direction cutting motion delivers 11-1/2 TPI.
What size NPT die do I need for pipe?
These super-efficient high-speed NPT dies are designed for 1 in. to 2 in. nominal pipe. The right-hand direction cutting motion delivers 11-1/2 TPI. RIDGID pipe dies deliver superior threading performance and capabilities, featuring durable construction to provide long service life and dependable performance
How do you cut NPT threads with a ratchet?
Connect to a compatible ratchet or electric threader to cut external pipe and conduit threads. Each set includes a ratchet with handle, die heads, and dies. Use them to cut NPT threads in steel pipe and conduit by hand.