14t pinion. Steel for 2mm axle. ø7.50m x 2.5mm

Scaleauto Steel Pinion: 14 teeth, 2 mm axle, ø7.50 mm × 2.5 mm

When the power transmission between motor and crown gear makes a difference in tenths, choosing the right pinion becomes a significant detail. This steel pinion from Scaleauto, reference SC-1134B75, is designed for 2 mm axles and offers an outer diameter of 7.50 mm with a width of 2.5 mm, combining dimensional precision with the durability required for continuous track use.

Function and Technical Features

• Number of teeth: 14
• Outer diameter: ø7.50 mm
• Width: 2.5 mm
• Compatible axle: 2 mm
• Material: Steel
• Scale: 1/32
• Brand: Scaleauto

Steel is the reference material for competition pinions: it better withstands the heat generated by long sessions, maintains the tooth profile with use, and transmits motor power with less loss than standard plastic pinions. In setups where reliability and consistency lap after lap are sought, the choice of material matters.

Compatibility and Installation

This pinion is designed for rear axles with a 2 mm diameter, the most common standard in 1/32 scale. It is compatible with the range of motors and chassis from Scaleauto that use this axle diameter, as well as with any setup of the same scale that adheres to this measurement.

The final gear ratio will depend on the crown gear it is paired with: with 14 teeth on the pinion, a crown gear with a higher number of teeth will provide more torque and acceleration, while a crown gear with a lower ratio will favour top speed. Adjusting this ratio is one of the most effective and accessible tuning tools in 1/32 slot racing.

Installation and Preparation

For correct installation, it is advisable to check that the pinion is well seated on the axle without lateral play and that the coupling with the crown gear has the minimum necessary clearance: neither excessive —which would cause vibration and premature wear— nor insufficient —which would generate friction and power loss—. A small dot of pinion glue or the appropriate tightening of the securing screw, depending on the chassis design, will ensure that the position is maintained during the session.

Common Mistakes

• Confusing the axle diameter: this pinion is specific for 2 mm; using it on 1.5 mm or 2.38 mm axles will cause play or mounting impossibility.
• Not checking the alignment with the crown gear before permanently securing the motor or rear assembly.
• Mixing steel pinions with very soft plastic crown gears without considering the accelerated wear that may occur on the crown gear.

Frequently Asked Questions

Which crown gears is this pinion compatible with?

With any crown gear designed for the standard module of Scaleauto 1/32 pinions that fits with a pinion of this diameter. The choice of the number of teeth on the crown gear will determine the final gear ratio.

Is it suitable for competitive use?

Yes. Steel is precisely the material chosen for competition setups, as it offers greater wear resistance and better dimensional stability under load and temperature than plastic.

What is the difference between the 2.5 mm width and other versions?

Scaleauto markets pinions with the same tooth count and diameter in different widths. The 2.5 mm width affects the coupling with the crown gear and must match the design of your chassis's drivetrain. Always check the width of the crown gear before choosing the pinion.

Can I use it on chassis that are not Scaleauto?

Yes, as long as the chassis uses a 2 mm rear axle and the crown gear is compatible with the module of this pinion. It is commonly used in custom setups with chassis from various brands in 1/32 scale.

Do I need any specific tools for installation?

Generally, a pinion puller and a suitable pusher for the axle diameter are sufficient. Scaleauto and other brands in the sector offer specific tuning tools to facilitate this process without damaging the pinion or axle.

The Scaleauto SC-1134B75 is a 14-tooth steel pinion gear for 2 mm axles, measuring ø7.50 mm × 2.5 mm, designed for 1/32 scale slot car setups. Its steel construction ensures consistent power transmission, minimal wear and reliable performance during competitive or club racing sessions. A precision component for any serious slot car builder working in the 1/32 scale.