34d In-Line Nylon Crown Gear for 3.0mm Shaft with M2.5 Screw Fixing (green)

Inline transmission with Scaleauto warranty: 34-tooth nylon crown gear for 3.0 mm axle

The SC-1104R crown gear from Scaleauto is specifically designed for inline configurations —those where the motor is positioned parallel to the rear axle and in line with the longitudinal axis of the car, lowering the centre of gravity and enhancing track balance—. With 34 nylon teeth and fixing via M2.5 screw, it combines lightness and a quiet engagement that 1/32 slot car preparers particularly value during long race sessions.

The green colour facilitates immediate identification on the workbench when working with multiple gear ratios at once, avoiding confusion with other crown gears in the Scaleauto range.

Main features

• Number of teeth: 34
• Material: nylon
• Compatible axle diameter: 3.0 mm
• Fixing: M2.5 screw
• Configuration: inline
• Identifying colour: green
• Reference: SC-1104R
• Brand: Scaleauto
• Scale: 1/32

Function and performance

Nylon offers a smooth engagement profile that reduces vibration and transmission noise compared to metal crown gears, especially at medium-high speeds. Additionally, it is a material with some self-lubricating capacity, which prolongs the lifespan of the crown gear and the pinion it works with. The fixing via M2.5 screw allows for easy axial position adjustment and re-adjustment of the crown during assembly or tuning, without risking damage to the axle.

With 34 teeth, this crown gear provides a longer gear ratio than lower-toothed crowns, resulting in a higher top speed with the same pinion. It is a common choice on circuits with long straights or on Sport track layouts where the aim is to optimise maximum speed without sacrificing smoothness of operation.

Compatibility and assembly

This crown gear is designed for 3.0 mm diameter axles, the most common standard in 1/32 competition slot cars. Before assembly, it is advisable to check that the axle is clean and free of burrs to ensure a proper fit. The M2.5 screw should be tightened with the appropriate tool until the crown is secure and free of lateral play, but without over-tightening the nylon material. It is recommended to check the alignment with the motor pinion after each assembly to avoid premature wear.

Common mistakes

• Over-tightening the M2.5 screw: this can deform the nylon and cause eccentricity in rotation. Adjust firmly but do not overdo it.
• Confusing axle diameter: this crown is for 3.0 mm; it is not compatible with 3/32" (2.38 mm) or 2.0 mm axles without modification.
• Mixing crown gears of different modules with the same pinion: always check that the module of the crown and that of the pinion match for correct engagement.

Frequently asked questions

Is this crown compatible with any inline motor for 1/32?

Yes, as long as the motor pinion has the same module as this crown and the rear axle is 3.0 mm. The fixing is independent of the motor and is done directly onto the axle.

What is the difference between an inline crown and an anglewinder crown?

The inline crown is used when the motor is oriented longitudinally with respect to the rear axle (in line with the car). The anglewinder crown has a bevelled profile for mounting with the motor at an angle. Using a crown of the incorrect type will result in poor or impossible engagement.

Why nylon and not aluminium or bronze?

Nylon reduces vibration, dampens light impacts, and operates more quietly. Aluminium or bronze provide greater rigidity and wear resistance under high load conditions, but generate more noise. For club or amateur use, nylon is usually sufficient and more economical to replace.

Does the green colour have any technical function?

No, it is solely for identification. Scaleauto uses different colours in its range of crown gears to facilitate quick differentiation between tooth counts and types, especially useful when working with multiple gear ratios.

Can I use this crown on Sport track and also on Scalextric or Ninco?

The crown itself is an internal component of the car and does not depend on the track system. It can be mounted on any 1/32 car with a 3.0 mm axle and inline configuration, regardless of the track on which it will be raced.

The Scaleauto SC-1104R is a 34-tooth inline crown gear in nylon, designed for 3.0 mm axles with M2.5 screw fixing, ideal for 1/32 slot car builds. Green colour for quick identification. A reliable choice for club racing and competition setups on Sport track systems.