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Simonds 78549600 triangular machinist file black oxide finish

Simonds

Simonds 78549600 Extra Slim Taper File 6 in tool storage

SKU CH-Z6HE-K4VQW

A 6-inch triangular machinist file with single-cut faces and edges for aluminium, brass, bronze, steel and tin

  • 6 in extra-slim taper reaches tight spots
  • Single-cut American pattern produces smooth finish on metal
  • Black oxide coating resists corrosion during storage
  • Triangular profile with three edges files corners and slots
  • 56 teeth per inch removes material efficiently

American Pattern Machinists File

The Simonds 78549600 is an American pattern machinists file designed for shaping aluminum, brass, bronze, steel and tin. Its triangular profile and single-cut faces suit machinists, metalworkers and hobbyists who need precise material removal on internal angles and corners. The 6 inch length without tang provides controlled handling for detailed bench work.

Black Oxide Finish and Bastard Cut

A black oxide coating protects the rigid steel body against corrosion during storage and use. The bastard cut coarseness with 56 teeth per inch delivers a balance of stock removal and surface finish on the listed metals. Single-cut edges on three faces produce consistent shavings without clogging under normal hand pressure.

Boxed Storage for Workshop Organisation

The file ships in a box that keeps the cutting edges protected and identifiable in a tool chest or drawer. Its slim 17/64 inch thickness and 9/32 inch diameter allow access to tight slots and keyways where broader files cannot reach. The tapered point concentrates pressure for starting cuts in confined areas.

Highlights

  • 6 in extra-slim taper reaches tight spots
  • Single-cut American pattern produces smooth finish on metal
  • Black oxide coating resists corrosion during storage
  • Triangular profile with three edges files corners and slots
  • 56 teeth per inch removes material efficiently

Specifications

BrandSIMONDS

Questions about this item

How do I secure the 6 in file in a handle so the 17/64 in tang does not spin?

Drive the tang fully into a drilled wooden or plastic handle until the shoulder seats; the 17/64 in taper locks by friction — skipping the pilot hole or using a loose handle is the step that causes rotation.

When will the 56 teeth per inch single-cut surfaces need replacement?

The black-oxide bastard-cut teeth wear gradually on aluminum, brass, bronze, steel and tin; replace the file when the 56 TPI edges no longer shave cleanly or the 1/4 in faces glide without cutting.

At what point does the 9/32 in triangular profile flex during heavy strokes?

The rigid 6 in blank resists bending until the 9/32 in diameter section reaches its yield limit; sustained pressure on the narrow tip will show permanent set first.

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