FISCHER bicycle crank arm puller square 85519 — crank extractor for square‑taper crank arms (black/silver)

FISCHER bicycle crank arm puller square 85519 is a dedicated tool for removing and installing square‑taper bicycle crank arms. Finished in black and silver, the extractor features a threaded pressing spindle that engages the crank axle to press crank arms out or seat them without damaging the taper. The tool is designed for use in workshops, home maintenance and bike service shops that handle square‑taper systems.

Advantages

The crank extractor provides controlled, axial force via a threaded spindle to minimise stress on the crank and axle during removal or installation. Its metal construction offers stability and durability for repeated use, and the two‑tone finish helps with orientation and visibility while working. The tool’s straightforward mechanical design requires no power source and fits standard square‑taper crank interfaces for reliable engagement.

Suitable for

• Removal and installation of square‑taper bicycle crank arms
• Workshop maintenance and professional bicycle servicing
• Home bike repairs and periodic crankset checks
• Service tasks where controlled, non‑impact extraction is required

When it may not be suitable

This crank arm puller is intended specifically for square‑taper crank interfaces and may not fit modern splined or proprietary crank systems. It is not designed for use on damaged or severely corroded tapers where additional preparation or specialist extraction methods may be necessary. For integrated or one‑piece bottom bracket cranks, a different extractor type is required.

Key specifications

• Compatibility: square‑taper bicycle crank arms
• Material: metal construction for pressing spindle and body
• Finish: black and silver
• Operation: threaded pressing spindle for axial extraction/installation
• Use case: manual, non‑powered crank arm extraction and insertion

How to use

Thread the extractor body into the crank arm’s threaded hole until it seats against the crank face, ensuring the tool engages square‑taper interface correctly. Turn the central pressing spindle so its tip bears against the crank axle; continue turning to apply axial pressure and press the crank arm off the axle. For installation, position the crank arm on the axle and reverse the process, using the spindle to press the arm onto the taper evenly. Use moderate, steady force and stop if resistance indicates misalignment or obstruction.

What to consider before purchase

• Confirm your crankset uses a square‑taper interface before buying
• Check that the extractor’s threading matches the crank arm’s threaded hole
• Assess condition of crank and spindle—seized or damaged parts may need additional care
• Have appropriate hand tools (wrenches) available to turn the pressing spindle

Usage recommendations

Use steady, controlled turning and avoid impact methods. Apply light penetrating oil if threads are corroded, and inspect the taper for burrs or damage before reinstallation. If excessive force is required, consult a professional to avoid damaging the crank or axle.