13d pinion. Ergal. ø6.75mm for 2mm axle

Precision to the millimetre: the Scaleauto Ergal pinion for 2 mm axle

In the preparation of a competition slot car, few decisions are as crucial as the choice of pinion. The Scaleauto SC-1096E67 is a 13-tooth pinion made from Ergal — a high-strength, lightweight aluminium alloy — with an outer diameter of 6.75 mm, designed to fit on 2 mm axles.

Main features

• Number of teeth: 13
• Material: Ergal (high-strength aluminium alloy)
• Outer diameter: ø 6.75 mm
• Axle diameter: 2 mm
• Reference: SC-1096E67
• Manufacturer: Scaleauto

Ergal: competition material

Ergal is an aluminium alloy widely used in competition applications where maximum strength-to-weight ratio is sought. Compared to standard plastic or nylon pinions, an Ergal pinion offers greater dimensional rigidity, less deformation under load, and a more direct power transmission. The result is a more linear and predictable response, particularly noticeable in high-speed configurations or with higher torque motors.

Function and performance on track

The pinion is the gear attached to the motor that transmits movement to the crown gear. The choice of the number of teeth — in this case, 13 — directly determines the car's gear ratio: when combined with crowns of different tooth counts, it allows for adjustments in top speed and acceleration according to the layout and race conditions.

A 13-tooth pinion with a compact diameter of 6.75 mm favours shorter gear ratios when combined with high-tooth crowns, resulting in greater acceleration out of corners. In technical layouts with many curves, this configuration can make a significant difference.

Compatibility and installation

This pinion is designed for 2 mm axles, a standard measurement in much of the slot market's motors and chassis configurations. Before installation, it is advisable to verify that the pinion's tooth profile is compatible with the crown used (gear module), as well as to check the correct centre distance to ensure a mesh without play or excessive tightness.

For optimal installation in inline or sidewinder configurations, it is important to precisely align the pinion with the crown to avoid premature wear and vibrations that could affect performance.

Common mistakes to avoid

• Installing the pinion without checking the centre distance with the crown: a too-tight mesh generates heat and wear; too loose, it leads to loss of efficiency and noise.
• Not checking the gear module before combining pinion and crown from different manufacturers.
• Over-tightening the fixing screw on aluminium pinions: it can deform the housing. Use the appropriate torque.

Ideal for…

This pinion is aimed at tuners and competitors looking to fine-tune their slot car's transmission with premium materials. It is especially useful in Sport track environments — Scaleauto, Slot.it systems — where the demand for mechanical precision is higher, although its use can extend to any setup using a 2 mm axle and compatible tooth profile.

Frequently asked questions

What advantage does Ergal have over nylon or plastic in a pinion?

Ergal is an aluminium alloy that offers greater rigidity and lower weight than nylon or plastic. This translates into a more direct power transmission, less deformation under load, and a longer lifespan in intensive use or competition conditions.

Which crowns is this pinion compatible with?

Compatibility depends on the gear module. We recommend consulting the crowns from the Scaleauto range to ensure correct meshing. Do not mix pinion and crown of different modules, as the meshing will not be correct even if they fit physically.

Is it valid for inline and sidewinder configurations?

Yes, as long as the motor uses a 2 mm output axle and the centre distance with the crown is appropriate. The configuration (inline, sidewinder, or anglewinder) does not affect the pinion itself, but how it is positioned relative to the crown in the chassis.

How much does the number of teeth on the pinion influence the car's behaviour?

Directly: the fewer teeth on the pinion (with the same crown), the greater the gear ratio and acceleration but lower top speed. With 13 teeth, this pinion allows for relatively short configurations, favourable in technical layouts with many curves.

Do I need special tools to install it?

It is recommended to use a pinion puller or, alternatively, a suitable mounting tool to avoid damaging the axle or the pinion during installation. Avoid striking directly on the aluminium to prevent deforming the tooth profile.

The Scaleauto SC-1096E67 is a 13-tooth Ergal aluminium pinion gear with a 6.75 mm outer diameter, designed for 2 mm axles. A precision slot car component ideal for competition setups, offering excellent strength-to-weight ratio and reliable power transmission. Compatible with Sport track systems and suitable for both inline and sidewinder motor configurations.