Crown gear 30d. Anglewinder 25° Procomp-R

30-Tooth Reverse Crown Gear for 25° Anglewinder Procomp-RS: Scaleauto Precision in Every Turn

The 30d. Anglewinder 25° Procomp-R SC-1170BR from Scaleauto is a replacement crown gear made from polyamide, specifically designed for 25° Anglewinder setups on the Procomp-RS platform. Its Reverse configuration determines the direction of rotation, so it is advisable to always check the configuration of your motor-pinion assembly before installation.

Technical Specifications

• Number of Teeth: 30
• Material: Polyamide (PA)
• Mounting Type: 25° Anglewinder
• Compatible Platform: Procomp-RS M50
• Outer Diameter: 15.8 mm
• Axle Diameter: 2.38 mm
• Fixing: M2.5 Screw
• Configuration: Reverse
• Brand: Scaleauto
• Reference: SC-1170BR

Function and Performance

The transmission in a competitive slot car directly depends on the quality and fit of the crown gear. Polyamide is a highly valued material in slot preparation due to its combination of lightness, wear resistance, and ability to absorb minor alignment imperfections without penalising the engagement. With 30 teeth and an outer diameter of 15.8 mm, this crown gear allows for defining gear ratios aimed at circuits with high-speed sections without sacrificing response in chicanes.

The 25° angle inherent to the Anglewinder system positions the motor diagonally relative to the rear axle, which helps to slightly lower the centre of gravity and better distribute mass in the Procomp-RS chassis, providing noticeable advantages in cornering stability.

Compatibility and Installation

This crown gear is designed to work on the 2.38 mm rear axle, a standard commonly found in Scaleauto Procomp-RS chassis. The fixing with an M2.5 screw facilitates adjustment and re-tightening without the risk of damaging the crown gear during maintenance. Before mounting, ensure that your motor's pinion is compatible with the Reverse configuration of this reference; in case of doubt, Scaleauto offers clearly differentiated standard and Reverse versions in its catalogue.

Common Mistakes When Choosing a Crown Gear

• Confusing the Reverse configuration with the standard: the direction of rotation is not interchangeable without also modifying the pinion.
• Not checking the axle diameter before ordering: the same crown gear may exist for 2.38 mm and for 3/32" (2.38 mm equivalent, but not always identical in manufacturing tolerance).
• Over-tightening the M2.5 screw on the polyamide crown gear: a firm and controlled tightening is sufficient; excess pressure can deform the housing.
• Mixing crown gears of different modules with incompatible pinions: ensure that the module of the pinion matches that of this crown gear.

Frequently Asked Questions

What is the difference between the standard version and the Reverse of this crown gear?

The difference lies in the direction of rotation of the motor and, therefore, in how the gear teeth are oriented. The Reverse version is used when the motor is mounted in such a way that it rotates in the opposite direction to the standard. Changing one for the other without adapting the pinion would cause the car to run backwards or the gear engagement to malfunction.

Is it compatible with all Scaleauto Anglewinder chassis?

It is optimised for the Procomp-RS M50 platform with a 2.38 mm axle. Other Scaleauto Anglewinder chassis may be compatible if they share the same axle specifications and crown gear module, but it is advisable to verify this in the chassis manual or by consulting with the preparer.

Is polyamide suitable for competitive use?

Yes. Polyamide is one of the most commonly used materials in competitive slot crown gears due to its good balance between rigidity, wear resistance, and performance against heat generated during long sessions. It is not as hard as brass, which gives it some cushioning ability in gear engagement.

What pinion should I combine with this crown gear?

It depends on the gear ratio you are looking for for your circuit. Scaleauto offers a wide range of pinions compatible with the Anglewinder Procomp-RS system. To fine-tune the setup, consider the length of the circuit, the number of curves, and the power of the motor you are using.

Can I install it myself without preparation experience?

The installation is accessible if you have basic slot preparation knowledge: adjusting the axle, placing the crown gear with the M2.5 screw, and checking the gear play with the pinion. If it is your first time, we recommend consulting the preparation resources available in the community or seeking help at a club.

The Scaleauto SC-1170BR is a 30-tooth polyamide crown gear for Anglewinder 25° Procomp-RS slot car setups, featuring a Reverse configuration, 2.38 mm axle bore, 15.8 mm outer diameter, and M2.5 screw fixing. Ideal for competitive slot car racing on Sport track systems, this replacement crown gear delivers reliable and precise power transmission for club racers and advanced hobbyists looking to fine-tune their drivetrain ratio.