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Round adjustable die, silver metal, knurled edges, slotted adjustment screw

Drill America

Drill America DWTSR112-1440 1/4"-40 HSS Round Adjustable Die

SKU CH-QVHX-9FGVT

Cuts 1/4"-40 threads with adjustable high-speed steel for extended wear life

  • High-speed steel construction extends wear life for threading tasks
  • Adjustable fine-pitch screw allows precise thread sizing
  • Dual chamfer design supports both standard and shoulder threading
  • 1/4"-40 thread specification matches specific fastening requirements
  • California Proposition 65 compliance ensures chemical hazard awareness

Threading Application

The Drill America DWTSR112-1440 is a high-speed steel round adjustable die designed for creating external threads. It suits machinists and maintenance personnel who need to cut or repair 1/4"-40 threads on rods or pipes. The tool is supplied new and carries California Proposition 65 warnings for chemicals linked to cancer and reproductive harm.

Wear Life and Adjustment

High-speed steel construction provides improved wear life during normal threading operations. The die features chamfers on both faces: one side offers a 2 to 3 thread chamfer for standard starts, while the other provides a 1 to 1-1/2 thread chamfer for work close to a shoulder. A fine-pitch screw allows the die halves to expand or contract for precise fit.

Sustained Cutting Behaviour

Under sustained load, the adjustable design maintains consistent thread quality by compensating for wear through the fine-pitch screw mechanism. The beveled slot permits removal of the adjusting screw when the die is mounted in a machine holder, transferring adjustment control to the holder's own screws. This arrangement supports repeatable results during extended production runs.

How it compares

Measured against everything we stock in Garden Hoses & Pipe Tubing, at today’s prices. Recalculated every night.

Price $29.99
Pricier than about 62% of the 973 comparable items (median $21.99).

Specifications

Product
Brand nameDRILL AMERICA

Questions about this item

How do I install the 1/4"-40 HSS round adjustable die and what step is often missed?

Place the die in a die stock or machine holder with the 2 to 3 thread chamfer facing the work, then tighten the fine-pitch adjusting screw to expand the die for the first cut; many users forget to back the screw off slightly after the initial threads are formed.

What maintenance or replacement will this 1/4"-40 HSS round adjustable die need later?

The high-speed steel cutting edges will gradually dull with use; when thread quality drops, the die cannot be resharpened economically and should be replaced.

What limit appears first when using this 1/4"-40 HSS round adjustable die continuously?

Heat buildup in the high-speed steel body reduces cutting efficiency and accelerates wear, so cutting fluid and periodic pauses are needed to maintain thread accuracy.

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