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Simonds 12 inch square machinist file in natural finish, boxed

Simonds

Simonds 73434000 12 in Square File tool storage

SKU CH-VWQ8-MBA7H

Square machinist file with bastard/double-cut teeth for aluminum, brass, bronze, steel and tin

  • 12-inch square file handles aluminium, brass, bronze, steel and tin
  • Bastard-cut double-cut teeth at 19 to 21 TPI remove material quickly
  • Safe edges protect adjacent surfaces during filing
  • Rigid 1/2-inch thick body resists flex under pressure
  • Wavy-tooth design breaks chips for smoother finish

Square file for metalworking

The Simonds 73434000 is a 12 in square machinists file designed for shaping and smoothing aluminium, brass, bronze, steel and tin. Its American-pattern bastard cut with wavy teeth removes material efficiently on flat surfaces, slots and internal corners. The rigid body tapers toward the point for access in tight areas. This tool suits fitters, machinists and apprentices who need a durable hand file for general workshop tasks.

Hand pressure and cutting feel

The double-cut faces and safe edges produce a consistent bite with moderate hand force, reducing vibration transmitted to the grip. At 1/2 in thick and 1/2 in wide, the file resists flexing during normal strokes, keeping the cutting action stable across the 19 to 21 teeth per inch. The natural finish and uninsulated tang transmit tactile feedback so the operator senses material hardness changes. No power source or cooling is required for typical bench use.

Sustained filing sessions

During prolonged use the rigid profile maintains its geometry without bowing, allowing repeatable strokes over long workpieces. The wavy tooth pattern resists loading on softer alloys such as aluminium and brass, so cutting efficiency drops less between cleanings. Safe edges prevent accidental damage to adjacent shoulders when filing deep slots. The box container protects the teeth from impact when stored alongside other tools.

Highlights

  • 12-inch square file handles aluminium, brass, bronze, steel and tin
  • Bastard-cut double-cut teeth at 19 to 21 TPI remove material quickly
  • Safe edges protect adjacent surfaces during filing
  • Rigid 1/2-inch thick body resists flex under pressure
  • Wavy-tooth design breaks chips for smoother finish

Specifications

BrandSIMONDS

Questions about this item

How do I fit a handle onto the 12 in square file with 1/2 in tang?

Push the handle straight onto the tapered tang until it seats firmly; do not hammer or twist, as that can split the handle or crack the tang shoulder.

When will the 19–21 teeth per inch double-cut surface need replacement?

Replace the file when the wavy teeth no longer bite into steel or brass and the surface glazes over; cleaning with a file card only restores cutting action while metal remains on the teeth.

At what point does the 1/2 in thick rigid body overheat during sustained filing?

The file body does not generate significant heat; the practical limit is tooth dulling, which increases required pressure and slows material removal on aluminum, brass or steel.

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