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Simonds 4in round machinists file double-cut natural finish

Simonds

Simonds 73394000 Round File 4in American Pattern Double-Cut Tool Storage

SKU CH-9N6F-VAX50

A 4-inch American-pattern double-cut round machinist's file with smooth 63 TPI teeth for shaping aluminium, brass, bronze, steel and tin

  • Smooth double-cut finish removes material cleanly on aluminum, brass, bronze, steel and tin
  • 4-inch round profile reaches inside holes and curves that flat files cannot
  • 63 teeth per inch give fine control for precision shaping and deburring
  • Rigid 5/32-inch thick body resists flex during heavy push strokes
  • Natural uncoated surface prevents contamination on sensitive metal workpieces

Simonds 73394000 Round File

This Simonds 73394000 round file is a 4-inch American pattern machinists file designed for shaping and smoothing curved internal surfaces. It suits metalworkers and hobbyists filing aluminium, brass, bronze, steel and tin. The double-cut profile on both face and edges provides efficient material removal with a smooth-cut finish. Four cutting edges and a tapered point allow access to tight radii.

Thermals Noise Power

As a hand tool, this file generates no heat, noise or electrical draw during use. The natural-finish steel body requires no power source and produces only the sound of cutting action. Rigid construction ensures consistent performance without vibration or flex. The 4-inch handle length gives controlled leverage for extended filing sessions without operator fatigue.

Build Fit Requirements

The file arrives in a protective box ready for immediate storage in a tool chest or drawer. Its 5/32-inch thickness and 63 teeth per inch suit precision work on small-diameter holes and curved profiles. No additional handles, power connections or mounting hardware are needed. The insulated-free design means users should wear gloves for grip and safety when working with oily or sharp-edged workpieces.

Highlights

  • Smooth double-cut finish removes material cleanly on aluminum, brass, bronze, steel and tin
  • 4-inch round profile reaches inside holes and curves that flat files cannot
  • 63 teeth per inch give fine control for precision shaping and deburring
  • Rigid 5/32-inch thick body resists flex during heavy push strokes
  • Natural uncoated surface prevents contamination on sensitive metal workpieces

Specifications

BrandSIMONDS

Questions about this item

How do I fit the 4 in round file into a handle without cracking the tang?

Hold the tang with pliers, tap the handle gently onto the tapered end, and avoid twisting; the 4 in tang seats straight when driven square.

When does the double-cut pattern on the 4 in round file need replacing?

Replace when the 63 teeth per inch no longer bite cleanly on steel or when the smooth cut leaves visible scratches instead of a uniform finish.

At what point does the 5/32 in thick round file overheat during sustained filing?

The rigid body conducts heat quickly; if the natural finish discolours or the file feels hot, stop and let it cool before continuing.

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