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Ridgid 47790 pipe die set for stainless steel 1 to 2 inch NPT four pieces

Ridgid

Ridgid 47790 Pipe Die Set for Stainless Steel

SKU CH-WD4P-Y1W1F MPN 47790

Right-hand high-speed NPT pipe dies for stainless steel, 1 to 2 inch pipe size, four dies per pack for universal die heads

  • TypeDrain Components
  • Right-hand threading cuts clean NPT threads on stainless pipe
  • High-speed steel dies resist wear during repeated stainless cuts
  • Four dies per pack cover the full 1-2 inch range
  • Designed for universal die heads already in the shop
  • Purpose-built for stainless steel pipe threading jobs

Product identity

The Ridgid 47790 is a four-piece set of right-handed high-speed NPT pipe dies designed for threading stainless-steel pipe from one to two inches. It fits universal die heads and is intended for professional plumbers and pipe-fitters who need replacement cutters for stainless-steel work. This set is not for users who only thread carbon steel or plastic pipe, nor for jobs requiring left-hand threads or sizes outside the stated range.

Thermals and power

Hand-operated threading tools produce negligible heat and noise during normal use, and they draw no electrical power. The cutting action relies on manual or powered drive equipment supplied separately, so thermal load and sound level depend entirely on that external drive rather than on the dies themselves.

Accessory impact

The pack contains four replacement dies and no additional handles, lubricants, or storage cases. Having a full set on hand lets the operator swap worn cutters immediately, maintaining thread quality on stainless steel without waiting for single-die deliveries. No software or calibration tools are included or required.

Highlights

  • Right-hand threading cuts clean NPT threads on stainless pipe
  • High-speed steel dies resist wear during repeated stainless cuts
  • Four dies per pack cover the full 1-2 inch range
  • Designed for universal die heads already in the shop
  • Purpose-built for stainless steel pipe threading jobs

Specifications

TypeDrain Components
BrandRidgid
Model47790

Questions about this item

How do I install the 47790 dies into my universal die head without misaligning the threads?

Slide each die into its matching slot in the head, orient the right-hand cutting edges forward, then tighten the head's locking screws evenly so the die faces stay flush with the guide ribs.

What part of the 47790 set will wear out first and need replacement?

The high-speed steel cutting edges on the four NPT dies dull with use; once they no longer produce clean threads on stainless pipe, replace the individual die or the full four-piece set.

What limit appears first when threading stainless pipe continuously with the 47790 dies?

Heat buildup at the cutting edges reduces sharpness quickly, so cutting speed drops and thread quality degrades unless you pause frequently for cooling.

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