Chainsaw File Makita D-73754 4.5 mm Hex, round sharpening file for chainsaw teeth

Makita Chainsaw File D-73754 is a 4.5 mm hex round sharpening file designed for restoring and maintaining the cutting edges of chainsaw teeth. The round cross-section matches the curvature of typical cutter profiles while the hexagonal shank provides secure fitting in compatible file handles or guide holders, enabling controlled sharpening motions and consistent tooth geometry during routine chain maintenance.

Advantages

The 4.5 mm diameter round file offers even material removal across the tooth radius, preserving the original profile and reducing the risk of uneven cuts. The hex shank improves grip and prevents slippage in a handle or guide, which helps achieve repeatable sharpening angles. The file’s construction is suitable for regular maintenance to sustain cutting performance and extend the usable life of the chain.

Suitable for

• Sharpening chainsaw cutting teeth with a 4.5 mm tooth size
• Routine chain maintenance in forestry and garden work
• Use with compatible file handles, jigs, and guide fixtures for controlled sharpening
• Restoring rounded cutter profiles on standard chainsaw chains

Key specifications

• File type: round / half-round profile suitable for cutter radius
• File diameter: 4.5 mm
• Shank shape: hexagonal for secure handle/guide fit
• Intended use: manual sharpening of chainsaw teeth
• Material: hardened steel file surface for edge abrasion

How to use

Secure the chain in a vise or in the chainsaw bar mount to prevent movement. Select the cutting tooth and position the round file matching the tooth’s radius. Insert the hex shank into a compatible file handle or guide to set the correct angle. Use steady, controlled strokes away from the tooth root toward the cutter tip, maintaining a consistent angle and number of strokes for each tooth. Sharpen every other tooth on one side, then reverse the bar or position the saw to sharpen the remaining teeth on the opposite side. After sharpening, remove filings and check chain tension before resuming operation.

Usage recommendations

Inspect teeth for cracks, excessive wear, or damaged depth gauges before sharpening. Use protective equipment and follow chainsaw safety procedures; replace the file when the cutting performance declines or the file surface becomes worn.