Removable pinion 10d 6.5mm with screw

The transmission ratio control starts here: Scaleauto removable pinion 10d 6.5 mm

In the world of competitive slot racing, the relationship between pinion and crown gear is one of the adjustments that most influences the car's behaviour: it affects acceleration, top speed, and the engine's performance on different track types. The removable pinion SC-1070E65 from Scaleauto offers exactly 10 teeth with a pitch of 6.5 mm and includes its own fixing screw for secure mounting and clean disassembly when you want to try a different combination.

Main features

• Number of teeth: 10
• Pitch: 6.5 mm
• Fixing system: screw included
• Removable design: facilitates ratio changes without the need for special tools
• Manufacturer: Scaleauto (reference SC-1070E65)

Function and performance

A 10-tooth pinion provides a shorter ratio compared to higher-tooth pinions, resulting in greater acceleration from a standstill and more responsiveness on technical sections with many curves. If the track has a winding layout or the straights are short, this combination can make a difference compared to setups aimed at top speed.

The 6.5 mm pitch determines compatibility with the crown gear: it is essential to verify that the crown mounted on your car has the same module to ensure correct and quiet meshing, without premature wear or loss of efficiency in the transmission.

Compatibility and installation

This pinion is designed within the Scaleauto spare parts ecosystem, primarily intended for its own chassis and setups. The included fixing screw allows it to be securely attached to the motor shaft, preventing slippage that can occur with friction-fit pinions in high-demand situations.

Before installation, it is advisable to check the inner diameter of the pinion to ensure it fits correctly onto your motor shaft. If in doubt, consult the technical documentation of your chassis or Scaleauto's own catalogue.

Installation and preparation

The removable nature of this pinion is a real advantage in the paddock: it allows you to adjust the ratio between heats without dismantling the entire chassis. We recommend using a screwdriver with the appropriate tip for the screw, tightening it firmly—without over-tightening—and checking the lateral play with the crown before heading out on track. A slight play is necessary for proper operation; overly forced meshing generates friction and heat.

Common mistakes

• Combining pinion and crown gears with different pitches: the meshing will not be correct and wear will accelerate.
• Over-tightening the fixing screw and deforming the motor shaft.
• Not checking the lateral play after installation, which can cause noise or loss of power.
• Using a 10-tooth pinion on long straight layouts without compensating with a lower-tooth crown: top speed will be lost.

Ideal for…

Enthusiasts preparing their slot cars for technical circuits or looking for a greater point of acceleration. It is also useful for those managing a small stock of pinions and needing a reliable replacement to keep their regular Scaleauto setups alive.

Frequently asked questions

What does "6.5 mm pitch" mean in a pinion?

The pitch defines the gear module, that is, the distance between teeth. For the pinion and crown to mesh correctly, both must have the same pitch. A pinion with a 6.5 mm pitch is only compatible with crowns of the same module.

Can I use this pinion with any slot motor?

It depends on the diameter of the motor shaft. Check that the inner hole of the pinion matches your motor shaft before installation. The fixing screw helps to compensate for small tolerances, but does not substitute for a diameter incompatibility.

What effect does reducing from 11 to 10 teeth on the pinion have?

It reduces the transmission ratio (shorter gear), which increases acceleration but limits top speed. It is a common adjustment for tracks with many curves or short acceleration sections.

Does the screw come pre-installed or separately?

The screw is included with the pinion. According to Scaleauto's removable design, the assembly is ready to be installed directly onto the motor shaft.

What crowns does this pinion pair well with?

With any crown of 6.5 mm pitch compatible with your chassis. Scaleauto has a wide catalogue of crowns in different tooth counts to adjust the ratio according to the layout and motor used.

The Scaleauto SC-1070E65 is a 10-tooth removable pinion gear with a 6.5 mm pitch, including a fixing screw for secure and precise installation. Designed for slot car racing setups, it allows quick gear ratio changes to fine-tune acceleration and top speed on different track layouts. Compatible with Scaleauto's range of crown gears sharing the same pitch module.