Crown gear 29d. Anglewinder 25° Procomp-R

The Anglewinder 25° Procomp-R Crown Gear: Precise Transmission for Your Slot Car Setup

When working on the transmission of a slot car with an Anglewinder configuration, every detail matters. The SC-1169R crown gear from Scaleauto —29 teeth, M50 pitch, 25° angle— is a part of the Procomp-R range, designed for demanding setups where gear engagement precision and consistency between units make the difference between a smooth transmission and one that vibrates or loses performance.

Technical Specifications

• Number of teeth: 29
• Mounting type: Anglewinder 25°
• Pitch: M50
• Outer diameter: Ø15.8 mm
• Compatible axle: 2.38 mm
• Fixing: M2.5 screw
• Reference: SC-1169R
• Brand: Scaleauto

Function and Performance

In an Anglewinder configuration, the motor is mounted at an angle relative to the rear axle. The crown gear must fit precisely to that attack angle —in this case, 25°— to ensure proper contact with the pinion and avoid premature wear or loss of traction. With 29 teeth and M50 pitch, this crown gear offers a gear ratio aimed at balancing top speed and acceleration, suitable for both Sport lane circuits and mixed tracks.

The Ø15.8 mm diameter allows for a snug fit on the 2.38 mm axle, and the M2.5 screw ensures fixation without compromising concentricity, a critical aspect to avoid vibrations at high revolutions.

Compatibility and Installation

This crown gear is designed for Scaleauto Procomp-RS chassis with Anglewinder configuration. Before installation, it is advisable to check that the motor pinion is also M50 pitch and that the attack angle of the motor-crown assembly is correct for the specific chassis. A small misalignment in the backlash —the play between crown and pinion— can generate noise, wear, or loss of efficiency: ideally, it should be set with minimal perceptible play, without the teeth being too tight.

Common Mistakes When Installing Anglewinder Crown Gears

• Using a crown gear with a different angle than that of the chassis: causes partial contact between teeth and accelerated wear.
• Over-tightening the M2.5 screw without first aligning the crown on the axle: generates eccentricity.
• Mixing different pitches (M50 with M48, for example): incompatible, should not be mixed.
• Not checking the backlash after each crown or pinion replacement.

Frequently Asked Questions

Is this crown gear compatible with any Anglewinder chassis?

It is optimised for Scaleauto Procomp-RS chassis with 25° Anglewinder configuration. For other Anglewinder chassis with different angles or brands, it is advisable to verify that the angle and M50 pitch are compatible before installation.

What pinion should I use with this crown gear?

A pinion with M50 pitch must be used, compatible with the motor mounted on the chassis. The number of teeth on the pinion will determine the final gear ratio and, therefore, the behaviour between acceleration and top speed.

What is the difference between an Anglewinder crown gear and a Sidewinder?

In the Sidewinder configuration, the motor is parallel to the rear axle (transverse), while in the Anglewinder, the motor is mounted at an angle relative to that axle. Each configuration requires specific crown gears with the appropriate tooth angle to ensure correct engagement.

Can I use this crown gear on Scalextric or Ninco track?

The crown gear itself is a component of the car, independent of the type of track. It can be used on cars running on both universal track (Scalextric, Ninco) and Sport track (Scaleauto, Slot.it), as long as the chassis and Anglewinder configuration are compatible.

How often should I check or replace the crown gear?

It depends on usage and the type of track. In competitive sessions or intense setups, it is advisable to inspect it periodically for wear on the tooth flanks or excessive play on the axle. At any sign of vibration or unusual noise in the transmission, it is recommended to check it.

The Scaleauto SC-1169R is a 29-tooth Anglewinder 25° crown gear from the Procomp-R range, designed for 2.38 mm axles with M50 pitch and M2.5 screw fixing. A precise slot car replacement part for competitive and club-level racing, compatible with Scaleauto Procomp-RS chassis in Sport lane configurations.