Crescent Nicholson 11904 8-Inch Round Bastard Cut Machinist File – American Pattern Single-Cut Tooth Matrix – For Deburring Internal Contours & Concave Holes

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SKU:
NCH11904
UPC:
7891645003302
MPN:
11904
Availability:
Ready to ship
Weight:
0.3000 LBS
On Sale
  • Nicholson 11904 8-inch round bastard cut hand file for metal shaping and sharpening.
  • Nicholson 11904 8-inch round bastard cut file with retail packaging and storage box.
  • Packaged Nicholson 11904 8-inch round bastard cut file for metalworking applications.
Now: $6.85
Was: $10.85
  • ✔️ Concave Precision Edge: 360-degree radial tooth layout delivers smooth, uniform deburring inside pipe bores. ✔️ Wear-Resistant Alloy: High-carbon tool steel geometry holds sharpness through heavy iron stocks. ✔️ 8-Inch Body. ✔️ Unhandled Base.
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Description

Nicholson 11904 8" Round Bastard Cut File

Rapid Concave Deburring. High-Carbon Steel Toughness. Tapered Nose for Tight Clearances.

The Crescent Nicholson American pattern round file brings industrial-grade material removal and precise shape control directly to professional metal shops and fabrication yards. Precision-machined from a premium high-carbon steel alloy, this 8-inch machinist file is specifically engineered to expand inner circular holes, clean up weld beads inside metal tubes, and smooth down concave structural curves. It provides tool-and-die makers, maintenance engineers, and fabrication technicians with the relentless abrasive velocity needed to shape hard metals without premature tooth flattening.

Aggressive utility and structural control define the design of this classic American pattern tool. The 11904 features a coarse Bastard Cut density with single-cut diagonal rows spiraling seamlessly across its full 360-degree round profile. This layout provides an ideal balance of fast material extraction and clean chip dispersal, preventing clog build-ups during heavy filing cycles. Engineered with a subtle taper narrowing towards the point, the nose enters small slots and narrow radii effortlessly, providing maximum clearance control exactly where you need it.

Why the Crescent Nicholson 11904 8" Round File Dominates the Bench:

  • Industrial High-Carbon Steel: Premium alloy construction undergoes advanced heat treatment to keep the cutting teeth razor-sharp over years of daily service.
  • Aggressive Bastard Cut Matrix: Coarse single-cut tooth spacing sheds metal rapidly, making quick work of heavy edge deburring and internal hole expansions.
  • Full 360-Degree Cutting Face: Precision teeth cover the entire circular surface, allowing you to smooth out concave curves from any working angle.
  • Tapered Nose Geometry: Slender tip eases entry into narrow openings and tight bores before expanding to full width for wide-stroke filing.
  • American Pattern Standard: Time-tested shop geometry delivers consistent, reliable performance on cast iron, structural steel, copper, and brass.

Specifications

Feature Specification
Model Number 11904
Brand Crescent Nicholson
File Pattern American Pattern Standard
File Profile Shape Round (Circular Cross-Section)
Overall Length 8 Inches (203 mm)
Coarseness Grade Bastard Cut (Coarse / Fast Stock Removal)
Tooth Style Single-Cut Diagonal Rows
Diameter / Thickness 5/16 Inch (7.9 mm) Wide Base
Tip Profile Slightly Tapered Toward the Point
Handle Inclusion Tool Only (Tang End Requires Separate Handle)

Frequently Asked Questions

+ Does this 8" round file include an attached wood or rubber handle?
No. The 11904 SKU is sold as a standalone bare file tool featuring a traditional bare pointed tang end. To prevent puncture injuries and ensure comfortable leverage on the bench, we highly recommend seating this file inside a separate Nicholson Interchangeable High-Impact Ergonomic Handle prior to field use.
+ What is the exact physical difference between "Single-Cut" and "Double-Cut" files?
Single-cut files feature a single row of diagonal teeth cut across the surface, providing a highly controlled, smooth finish that is perfect for sharpening edges and precision deburring. Double-cut files feature a second criss-crossing row of teeth that forms a diamond pattern, which breaks metal chips down faster for aggressive, heavy stock removal at the expense of a rougher surface finish.
+ Can I use this round bastard cut file to sharpen my chainsaw chains?
No, it is not recommended. Chainsaw files require a highly specialized, uniform circular geometry with spiral-cut fine teeth to properly reshape curved chain teeth chasers. This machinist's file features a tapered nose and a coarse bastard tooth matrix, which will chew up or misshape a chainsaw chain's cutting profiles. For saw sharpening, please look at our dedicated Nicholson Chainsaw File Series.
+ How do I keep the metal teeth from clogging up when filing soft materials?
Filing soft metals like aluminum, copper, or brass can cause soft shavings to get packed tightly inside the tooth rows, a problem known as "pinning." To prevent this and keep your cuts crisp, clean the grooves regularly with a specialized file card brush. Rubbing a small piece of standard school chalk along the file face prior to cutting can also help prevent soft metal particles from sticking.
 
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Product Specifications

category_bullets:
• Nicholson 8" Round File Core: Premium high-carbon steel tool shapes and deburrs circular openings, internal curves, and concave metal. • Bastard Single-Cut: 26 teeth per 25mm. • Tapered Point Nose. • American Pattern.
selling_points:
✔️ Concave Precision Edge: 360-degree radial tooth layout delivers smooth, uniform deburring inside pipe bores. ✔️ Wear-Resistant Alloy: High-carbon tool steel geometry holds sharpness through heavy iron stocks. ✔️ 8-Inch Body. ✔️ Unhandled Base.
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