Crown gear 28d. Anglewinder 25 Procomp-RS

Precision transmission for anglewinder: the 28d Procomp-RS Crown from Scaleauto

When the anglewinder configuration is chosen for assembly, every component of the transmission matters. This 28-tooth crown from Scaleauto, part of the Procomp-RS range, is made from high-strength polyamide and specifically designed to work at a 25-degree angle relative to the rear axle, the characteristic inclination of anglewinder mounts.

Technical specifications

• Number of teeth: 28d. — M50 pitch
• Mounting angle: Anglewinder 25 degrees
• Material: Procomp-RS polyamide
• Diameter: 15.8 mm
• Compatible axle: 2.38 mm
• Fixing screw: M2.5
• System: Reverse Insert
• Reference: SC-1168BR

Function and performance

The M50 pitch of this crown is one of the most widely used standards in slot racing, and it pairs well with a wide variety of market pinions. The 28 teeth provide an intermediate gear ratio: enough traction for demanding corners without sacrificing top speed on the straights. It is a common choice in racing clubs where the balance between acceleration and maximum speed is critical.

Manufactured from Procomp-RS polyamide, it ensures precise tooth engagement, with low play and good wear resistance under intensive use conditions. Unlike metal crowns, polyamide better absorbs micro-vibrations from the drivetrain, contributing to cleaner and more predictable driving.

Compatibility and mounting

This crown is designed for chassis with a 25-degree anglewinder configuration, both in cars from the Scaleauto brand and in custom preparations and chassis that respect that mounting angle. The Reverse Insert system allows for the inversion of the mounting orientation, expanding adjustment possibilities according to the motor position and wheelbase of the chassis.

The 2.38 mm axle is the most common standard in competitive slot racing, making integration with most rear axles on the market straightforward. The M2.5 fixing screw ensures a firm grip without the risk of deforming the part.

Assembly and preparation

To achieve maximum performance, we recommend checking the alignment between pinion and crown before final tightening. A slight lateral deviation can introduce noise, premature wear, and loss of efficiency in the transmission. Using a play gauge or simply rotating the assembly by hand before securing the screw is a common practice among preparers. Lightly lubricating the teeth with specific slot transmission grease significantly extends the lifespan of the part.

Frequently asked questions

Which pinions is this crown compatible with?

Being M50 pitch, it is compatible with all pinions of the same pitch available in the slot market. Scaleauto has its own range of Procomp-RS pinions in different tooth counts to adjust the gear ratio according to the track and motor used.

What is the difference between an anglewinder crown and a sidewinder crown?

The anglewinder crown is designed to work with the motor inclined at an angle relative to the rear axle, while the sidewinder crown is used when the motor is parallel to the axle (transverse). They are not interchangeable: the tooth angle and mounting position are different.

What is the Reverse Insert system?

The Reverse Insert is a system that allows for the inversion of the orientation of the inner insert of the crown, facilitating lateral position adjustment on the axle and expanding compatibility with different anglewinder chassis.

Is Procomp-RS polyamide as durable as a metal crown?

Under normal club or amateur-semi-professional competition use conditions, Procomp-RS polyamide offers very good durability. The advantage over metal is the reduction of noise and vibrations; the disadvantage is that under very intensive use and high power, it may wear out faster than a metal crown.

Is it suitable for Sport track systems?

The crown itself is independent of the track system: what determines compatibility with Sport track (Scaleauto, Slot.it) or Universal track (Scalextric, Ninco) is the car chassis, not the crown. This part is perfectly valid for any anglewinder configuration, regardless of the type of track.

The Scaleauto SC-1168BR Procomp-RS 28-tooth anglewinder crown is a precision transmission component for competitive slot car racing. Designed for 25-degree anglewinder setups, it features M50 pitch, 15.8 mm diameter, 2.38 mm axle compatibility, M2.5 fixing screw, and a Reverse Insert system. Made from high-grade polyamide for smooth, low-vibration power transfer. A go-to choice for club racers and slot car builders seeking reliable, consistent drivetrain performance.