48mm axle with ground centre (X2)

Precision from the Centre: Slot.it's Ground Axle for Anglewinder

When thoroughly preparing a slot car, the unseen details are the ones that make the most difference on track. This 48 mm axle from Slot.it comes ground and hardened from the factory, with a lightened centre to reduce rotating mass and improve acceleration response. A component designed for those who leave nothing to chance.

Technical Specifications

• Diameter: 2.38 mm (3/32")
• Length: 48 mm
• Finish: Ground and hardened
• Centre: Lightened for weight reduction
• Pack Contents: 2 units

Function and Performance

The grinding ensures very tight concentricity: the axle spins without noticeable eccentricities, resulting in clean transmission and no vibrations. The hardening provides surface hardness to resist wear at the bearing contact points, extending the lifespan of the assembly.

The lightened centre is not a minor detail: by removing material from the central area—where less structural effort is needed—rotational inertia is reduced. In an anglewinder setup, where the motor operates at an angle to the rear axle, this mass saving facilitates quicker rhythm changes and a more direct response to the throttle.

Compatibility and Installation

The 3/32" diameter is the standard in the Slot.it spare parts range and is compatible with most bearings, wheels, and crown gears from that same family. The 48 mm length fits chassis with standard rear wheel spacing in 1/32 scale. Always check the fit with the specific chassis bearings you intend to use before installation.

Ideal for…

• Preparers and club drivers looking to reduce weight in the rear end.
• Anglewinder setups where axle precision is critical for transmission.
• Replacement of the original axle when vibrations or wear are detected in the bearings.
• Competition builds where every tenth of a gram counts.

Considerations

The pack includes 2 units, allowing for a spare axle to be ready or to equip two cars at once. As a precision component, it is recommended to handle it carefully to avoid marking the contact areas on the bearings. If working with a fixed crown, ensure that the fixing point is outside the lightened section.

Frequently Asked Questions

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

A ground axle has undergone a precision machining process that ensures a uniform diameter and a smoother surface. This reduces eccentricity when spinning and improves the fit with the bearings, which directly affects the car's stability in competition.

Why is the lightened centre an advantage in anglewinder?

In an anglewinder configuration, the motor transmits rotation to the rear axle through a pinion and crown gear at an angle. Reducing the axle's mass decreases rotational inertia, resulting in more immediate acceleration and less effort for the motor when changing speed.

Is it compatible with chassis that use Sport track?

The axle's compatibility depends on the chassis and bearings, not the type of track. The 3/32" diameter and 48 mm length are standard in the Slot.it range, so it fits without issue in the chassis and mounts of that brand. For other chassis, check the specifications before installation.

How many units are included in the pack?

The pack contains 2 units.

Do I need special tools for installation?

Generally, the usual slot preparation tools are sufficient: a wheel puller, an axle fixer, and, if you are adjusting the crown gear, the appropriate wrenches or stops. No special tools are needed beyond what is typically found in a preparation workshop.

The Slot.it SIPA01-48R is a 48 mm precision ground and hardened axle for 1/32 slot car racing, featuring a lightened center section to reduce rotational inertia. With a 2.38 mm (3/32") diameter, it is engineered for anglewinder setups where axle concentricity and weight savings directly impact acceleration response and overall performance. Pack of 2 units. Compatible with standard Slot.it hubs, bearings and inline or anglewinder chassis builds.