Heyco Engineers File Half Round

Heyco Engineers' Halfround File, 200mm

Precision shaping. Professional control.

The 200mm Engineers' Halfround File from Heyco is built for accurate material removal and smooth finishing. Featuring a dual-profile design — flat on one side, half-round on the other — it allows you to shape flat surfaces, contours, and curved edges with confidence.

Ideal for Setting Piston Ring Gap

When fitting piston rings, control is everything. The cut and grit of this file are ideal for adjusting piston ring gap—aggressive enough to remove material efficiently, yet fine enough to prevent chipping or tearing the ring edge.

It allows you to creep up on your final measurement with precision, ensuring a clean, square edge and a properly set gap for optimal compression and reliability.

Restore & Maintain Axles

This file is also ideal for smoothing axles where set screws have raised burrs or high spots. Clean up minor damage quickly and evenly, helping keep your axle in reusable condition instead of replacing it prematurely.

Manufactured from high-quality hardened steel, this file delivers consistent cutting performance and long service life in demanding workshop and motorsport environments.

Features:

• 200mm professional-length profile
• Half-round + flat dual-surface design
• Correct grit for precise piston ring gap setting
• Ideal for smoothing axle set-screw marks
• Hardened, wear-resistant steel
• Controlled, even material removal

For engine builders and racers who demand accuracy and longevity from their components.