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Simonds 8-inch square file, bastard double-cut, natural finish

Simonds

Simonds 73430000 Square File 8in Bastard Double-Cut

SKU CH-D983-ED6ET

An 8-inch square machinist's file with double-cut bastard teeth for aluminium, brass, bronze, steel and tin

  • Cuts aluminium, brass, bronze, steel and tin
  • Bastard double-cut teeth remove stock quickly
  • Square profile with four cutting edges reaches corners
  • Wavy tooth pattern breaks chips for smoother finish
  • Safe edges protect shoulders while filing flats

Simonds 8 in Square Machinists File

The Simonds 73430000 is an American-pattern machinists file with a square profile and double-cut faces. Its bastard coarseness suits general shaping on aluminium, brass, bronze, steel and tin. Four cutting edges and a taper toward the point give controlled material removal in slots, keyways and flat surfaces. The 8 in length without tang provides reach for bench and machine work.

Check tang fit and workpiece hardness

Verify that your handle accepts the 8 in tang length or plan to fit a new handle before use. Confirm the material you are filing falls within the listed aluminium, brass, bronze, steel and tin range; harder alloys will dull the teeth quickly. The safe edges protect adjacent shoulders, so ensure the slot or corner geometry allows the uncut edges to ride the reference surface.

Rigid natural-finish body with wavy-tooth pattern

The rigid, natural-finish steel body resists flex during heavy strokes while the wavy-tooth pattern breaks chips for smoother cutting. Double-cut faces at 25 to 28 teeth per inch leave a consistent surface ready for finishing passes. Safe edges prevent marring adjoining faces, and the square cross-section fits standard machinists-file handles for everyday shop use.

Highlights

  • Cuts aluminium, brass, bronze, steel and tin
  • Bastard double-cut teeth remove stock quickly
  • Square profile with four cutting edges reaches corners
  • Wavy tooth pattern breaks chips for smoother finish
  • Safe edges protect shoulders while filing flats

Specifications

BrandSIMONDS

Questions about this item

Does the Simonds 73430000 8 in square file come with a handle in the box, or do I need to buy one separately?

The file is supplied in a box with an 8 in handle already fitted, so no separate handle purchase is required.

What does the bastard cut with 25 to 28 teeth per inch mean for material removal on steel?

The bastard double-cut pattern gives a coarse, aggressive bite that removes steel quickly while still leaving a finish smooth enough for most fitting work.

How does the 5/16 in square profile with safe edges affect use in corners and keyways?

The square section reaches into tight corners and keyways, while the safe edges prevent scoring the adjacent faces during each stroke.

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