11t pinion. Ergal. ø6.5mm for 2mm axle

When every gram counts, the SC-1094E65 pinion in Ergal is the answer for serious competitors.

The transmission is one of the most sensitive elements in a competition slot car. A lighter pinion reduces rotational inertia, resulting in quicker accelerations, more precise braking, and a cleaner overall response from the drivetrain. The SC-1094E65 is made from Ergal, a high-strength aluminium alloy that combines lightness and rigidity in a way that is hard to match with brass or steel.

Function and performance

This 11-tooth (11z) pinion has an outer diameter of ø6.5mm and is designed for 2mm axles, the most common standard in 1/32 scale slot racing. By reducing the rotating mass, the motor works with less effort during regime changes, which can make a difference on tracks with many curves or frequent changes of pace.

Ergal not only provides lightness: its machining allows for tighter tolerances than softer alloys, ensuring precise engagement with the crown gear and efficient power transmission without unnecessary play.

Compatibility and installation

With a central hole for 2mm axles, it fits into the vast majority of competition configurations. The outer diameter of 6.5mm distinguishes it from smaller versions of the same family (such as those with 5.5mm), so it is advisable to check the available space in the chassis and the distance between axle and motor centres before installation.

• Material: Ergal (high-strength aluminium alloy).
• Number of teeth: 11d (11z).
• Outer diameter: ø6.5mm.
• Inner diameter (axle): 2mm.
• Application: High-end replacement for competition slot racing.

Installation and preparation

Installing an Ergal pinion requires some care: being aluminium, excessive tightening of the fixing screw can damage the housing. We recommend using a quality screw with the appropriate torque and, if the axle does not have a reference flat, considering a specific adhesive for slot axles. Always check the play between pinion and crown gear before running: overly forced contact will prematurely wear both parts.

Common mistakes

• Confusing the diameter of this pinion (ø6.5mm) with 5.5mm versions of the same family. Check the full reference before ordering.
• Over-tightening the fixing screw on the axle. Ergal is strong, but it is not indestructible against disproportionate tightening.
• Not checking the resulting gear ratio with the crown gear before installation. An 11-tooth pinion with a large crown gear can result in a ratio that is too long or too short depending on the track.

Frequently asked questions

What advantage does Ergal have over brass in a pinion?

Ergal is significantly lighter than brass, which reduces the rotational inertia of the transmission. This improves acceleration and motor response, especially on tracks with many curves. In exchange, it requires more careful installation to avoid damaging the material.

Is this pinion compatible with Sidewinder and Anglewinder motors?

Yes, as long as the chassis accommodates a pinion of ø6.5mm and the motor axle is 2mm. Both in Sidewinder configuration (motor parallel to the rear axle) and Anglewinder (motor angled relative to the rear axle), compatibility depends on the available space and the crown gear used.

How do I know if this pinion fits with my current crown gear?

The number of teeth (11z) must be compatible with the module of your crown gear. Ensure that both parts share the same module (usually M50 in 1/32 competition slot racing) to guarantee correct engagement.

Can I use this pinion on a UNIVERSAL track car (Scalextric, Ninco)?

It depends on the motor and chassis. If the motor has a 2mm axle, the pinion fits mechanically. However, in standard cars, space may be limited. This pinion is primarily aimed at prepared competition chassis.

Do I need any special tools to install it?

An Allen key of the appropriate size for the fixing screw is sufficient. If the axle does not have a flat support for the screw, it is advisable to use a pinion puller to remove it without damaging the axle or the pinion itself.

The SC-1094E65 is an 11-tooth Ergal aluminium pinion gear with a 6.5mm outer diameter, designed for standard 2mm axles in 1/32 scale slot car racing. Its lightweight construction reduces rotational mass for faster acceleration and sharper throttle response, making it a preferred upgrade for club competitors and serious hobbyists running Sidewinder or Anglewinder motor configurations.