54mm axle with ground centre (X2)

Precision in Every Tenth: the Ground Axle from Slot.it for Anglewinder Mounts

The Slot.it SIPA01-54R axle is a preparation component designed for those who leave nothing to chance. Made from hardened and ground steel, it combines structural rigidity with a relieved centre that reduces mass at the least critical point of the axle, contributing to better weight distribution in the chassis.

Technical Features

• Diameter: 2.38 mm (3/32")
• Length: 54 mm
• Finish: ground and hardened
• Relieved centre for weight reduction
• Contents: 2 units per pack

Function and Performance

The grinding ensures very tight concentricity, resulting in clean, vibration-free transmission. The hardening provides surface hardness to withstand wear caused by bearings and continuous track use. The relieved centre, in turn, removes material from the central area of the axle — where the torsional torque is minimal — without compromising rigidity at the supports. The result is a lighter axle than an equivalent solid axle, with direct benefits on rotational inertia.

Recommended Applications

The length of 54 mm and the relieved centre make this axle especially suitable for anglewinder mounts, where the motor is positioned at an angle to the rear axle. In this type of configuration, weight control and mass distribution have a direct impact on cornering behaviour and the overall stability of the car.

It may also be of interest to preparers looking to reduce inertia in sidewinder mounts — motor parallel to the rear axle — as long as the 54 mm length is compatible with the chassis used.

Mounting and Preparation

As this is a ground axle, the fit with bearings and crown gears must be done with the tolerances specific to Slot.it components. It is recommended to always check concentricity after mounting and before securing the crown and pinion. The use of a dial gauge facilitates the detection of any minimal deviation that may affect the running.

Frequently Asked Questions

What is the difference between a ground axle and a standard one?

A ground axle has undergone a high-precision machining process that minimises diameter variations and eccentricity. This results in less vibration, better bearing performance, and a more efficient power transfer from the motor to the wheel.

What advantage does the relieved centre provide?

By removing material from the central area of the axle, total mass is reduced without affecting strength at the support points. Less weight in rotation means less inertia, which improves response in acceleration and braking.

Is it compatible with standard 3/32" bearings?

Yes, the diameter of 2.38 mm (3/32") is the usual standard in the Slot.it ecosystem, so it is compatible with bearings of that size. Always check the fit before final mounting.

What type of motorisation is it primarily indicated for?

The relieved centre and the length of 54 mm particularly orient it towards anglewinder configurations, although it can be used in sidewinder mounts as long as the chassis dimensions allow it.

Does the pack include two identical axles?

Yes, the pack contains 2 identical units of the SIPA01-54R axle.

The Slot.it SIPA01-54R is a 54 mm ground and hardened steel axle with a relieved centre section, designed to reduce rotational inertia in anglewinder and sidewinder slot car builds. With a 3/32" (2.38 mm) diameter and precision-ground finish, it ensures minimal runout and smooth power transfer from motor to rear wheels. Ideal for club racing and competitive slot car preparation. Pack of 2 axles.