Aluminium angle crown gear 35 teeth 17.5mm

The NSR6235 is the reference anglewinder crown gear for those who fine-tune every detail of the transmission in their 1/32 scale slot racing cars.

Manufactured from high-strength aluminium with a central bronze insert, the NSR6235 combines lightness and durability in a single piece. The aluminium reduces the rotating mass —something noticeable in the acceleration response— while the bronze core minimises friction on the axle and extends the lifespan of the assembly. The result is a crown that spins smoothly, without vibrations, and maintains constant contact with the pinion.

Function and Performance

With 35 teeth and a diameter of 17.5 mm, the NSR6235 allows for precise definition of the car's gear ratio. A 35T crown offers a balance between top speed and acceleration, particularly useful on mixed layouts: medium straights with technical sections where speed recovery out of corners makes a difference.

The machining of NSR ensures perfect tooth-to-tooth geometry, resulting in silent and skip-free gearing even at high RPM. This reduces wear on both the crown and the pinion, extending maintenance intervals in endurance races.

Compatibility and Installation

The NSR6235 is designed for standard 3/32" (2.37 mm) rear axles and is compatible with the anglewinder motor position, where the motor is angled relative to the rear axle. The attachment is made using an included M2.5 Allen screw, facilitating installation and gear ratio changes without special tools beyond an appropriately sized Allen key.

Within the NSR catalogue, this crown is a common spare part for GT models and prototypes configured in anglewinder, although its use is not limited to any specific model: any 1/32 slot car with a 3/32" axle and anglewinder motor position can benefit from it.

Preparation and Fine Tuning

When replacing the crown, it is advisable to also check the pinion it meshes with to ensure compatibility of the pitch. NSR works with pitch 48 in its range of crowns and pinions, so if you combine components from different NSR references, you should not encounter incompatibilities. Before permanently securing the M2.5 screw, adjust the lateral play between the crown and pinion: excessive play generates noise and wear; too tight can cause binding or overheating.

Apply a small amount of specific slot gear grease to the teeth before the first runs. This promotes the bedding-in of the new crown and progressively establishes contact with the pinion.

Common Mistakes When Installing Anglewinder Crowns

• Not centring the crown on the axle: if it is laterally misaligned, the meshing with the pinion will be irregular and vibrations will occur. Check the alignment before tightening the screw.
• Over-tightening the M2.5 screw: this can deform the bronze core and hinder the free rotation of the axle. Tighten firmly but without forcing.
• Confusing anglewinder configuration with sidewinder or inline: the NSR6235 is specific for anglewinder. In a sidewinder or inline configuration, the motor position is different and requires a different type of crown.

Frequently Asked Questions

What pitch pinion is the NSR6235 compatible with?

The NSR range of crowns and pinions works with pitch 48 (48 teeth per inch). Ensure you use NSR pinions of the same pitch to guarantee correct meshing.

Is it compatible with 2 mm axles?

No. The NSR6235 is designed for 3/32" axles (approximately 2.37 mm). For 2 mm axles, there are other specific references within the NSR catalogue.

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

The difference lies in the angle of attack of the teeth relative to the axle, which adapts to the motor inclination in each configuration. An anglewinder crown does not fit correctly in a sidewinder setup, and vice versa. The NSR6235 is exclusively for motors in anglewinder position.

When should I replace the crown?

When you observe visible wear on the teeth, unusual noise or vibration during operation, or loss of traction that cannot be explained by other causes. In intensive competitive use, periodic inspection of the crown and pinion is part of standard maintenance.

Can I use this crown on cars from other brands?

Yes, as long as the car has a 3/32" rear axle, anglewinder configuration, and the pinion is pitch 48. Compatibility depends on these three factors, not on the brand of the chassis.

Does it include a pinion?

No. The NSR6235 is just the crown. The pinion must be purchased separately according to the desired gear ratio.

The NSR6235 is a 35-tooth anglewinder crown gear for 1/32 scale slot cars, machined from aluminium with a bronze insert for reduced friction and longer lifespan. Fitting standard 3/32" axles and secured with an M2.5 Allen screw, it delivers smooth and precise gear mesh at high RPM. An essential spare part for NSR slot car setups, compatible with any anglewinder motor configuration using 48-pitch gears.