AW Rt4 Motor Mount Bearings

The Anglewinder RT-4 Motor Mount with Bearings from Scaleauto: Precision Where It Matters Most

The AW RT-4 Motor Mount with Bearings (SC-6529A) from Scaleauto is a tuning component designed for Anglewinder installations, with an offset of -0.75 mm from the standard position. This slight variation in geometry can lead to noticeable changes in the car's behaviour on the track, particularly in terms of traction and cornering response.

Function and Performance

In an Anglewinder configuration, the motor is positioned at an angle to the rear axle, allowing for a compact design and a relatively low centre of gravity. The mount is the element that secures and aligns the motor, and its manufacturing quality directly impacts power transmission and the stability of the assembly.

This model is designed to accommodate bearings, as opposed to versions with nylon bushings. Bearings reduce friction in the axle rotation and improve energy efficiency, resulting in higher top speeds and less long-term wear. For those fine-tuning their cars in club or competitive environments, this detail is significant.

The -0.75 mm offset modifies the distance between the pinion and crown gear relative to the reference position, allowing for more precise gear mesh adjustment based on the pinion and crown gear combination used. Choosing the mount with the correct offset is as important as selecting the right gear ratio.

Compatibility

This mount is designed for Scaleauto cars with an Anglewinder RT-4 rear end. Before purchasing, it is advisable to verify that your car's chassis and motor position are compatible with this type of mount and the specified offset.

Installation and Preparation

The process of replacing or adjusting the motor mount is a common operation in the preparation of competitive slot cars. Some practical tips:

• Check the motor alignment before permanently securing the mount to avoid stress on the axle.
• Check the lateral play of the crown gear once installed: it should not be too tight or excessively loose.
• If using bearings, ensure they are properly seated and, if recommended by the manufacturer, apply a minimal amount of lubricant.
• After installation, always perform a few laps at moderate speed before pushing the assembly to its limits.

Common Mistakes

• Confusing the required offset: each combination of pinion, crown gear, and chassis may require a different offset. Consult with other tuners in your club or check specialised forums if in doubt.
• Over-tightening the mounting screws: this can deform the mount and affect the motor alignment.
• Mixing mounts for bushings with those for bearings: the housing is sized for one or the other; using the incorrect type can create unwanted play or stress.

Frequently Asked Questions

What is the difference between a bearing mount and a bushing mount?

The axle housing is sized differently. Bearings are higher precision components that reduce friction more efficiently than nylon bushings, but they require a specific mount with the appropriate tolerances to seat correctly.

What does the -0.75 mm offset mean exactly?

The offset indicates the displacement of the motor position relative to a standard reference. A negative offset brings the pinion closer to the crown gear; a positive offset moves it further away. Choosing the correct offset ensures optimal gear mesh and prevents premature wear or noise in the drivetrain.

Is this mount compatible with all Scaleauto cars?

It is designed for Scaleauto cars with an Anglewinder RT-4 rear end. Not all models from the brand share the same motorisation system, so it is essential to verify compatibility with your specific model before placing an order.

Can this mount be used interchangeably on Scalextric or Scaleauto tracks?

The mount is an internal component of the car and does not depend on the type of track. What may vary is the optimal setup depending on the circuit, but the compatibility of the mount is determined by the chassis, not by the lane.

Is this a part recommended only for competition?

Not exclusively. Any enthusiast looking to maximise the performance of their Scaleauto car or simply maintain it in good condition can benefit from replacing or upgrading the motor mount with this precision component.

The Scaleauto SC-6529A is an Anglewinder motor mount for the RT-4 system, featuring a -0.75 mm offset and bearing housing. Designed for Scaleauto slot cars, it allows precise pinion-to-crown mesh adjustment and optimised drivetrain performance. A key tuning part for club racers and competitive slot car builders looking to fine-tune their rear axle setup.