AW RT3 Offset Motor Mount -0.50mm

Fine adjustment for your anglewinder: Scaleauto AW RT3 motor mount with -0.50 mm offset

The AW RT3 Offset -0.50 mm Extra-Hard Motor Mount (reference SC-6536C) from Scaleauto is a tuning part designed for those seeking real precision in motor positioning. That half millimetre of displacement can make the difference between a transmission that vibrates and one that runs smoothly and efficiently.

Function and performance

The motor mount is the element that anchors the motor bracket to the body or chassis, accurately determining the distance and angle between the pinion and crown gear. In an anglewinder configuration —motor positioned at an angle to the rear axle— any variation of tenths in the offset directly modifies the gear engagement of the transmission and, consequently, the car's response.

• -0.50 mm offset: slightly shifts the motor to achieve a tighter gear engagement or adapt to specific combinations of pinion and crown gear.
• Extra-Hard hardness (identified in red): the stiffest version in the range, which reduces flex in the mount under load and keeps the transmission geometry stable even in high-demand sections.
• Manufactured by Scaleauto, a benchmark brand in spare parts and tuning for competitive slot racing.

Compatibility

This mount is designed for Scaleauto cars with RT3 anglewinder configuration. Before installation, check that the reference of your bracket and chassis is compatible with the RT3 series from Scaleauto, and that the combination of pinion and crown gear you are using benefits from a -0.50 mm negative offset.

Installation and tuning

The adjustment of the offset is one of the most delicate parameters in tuning a competitive slot car. An incorrect offset causes premature wear of the pinion and crown gear, transmission noise, and loss of efficiency in power delivery. We recommend:

1. Carefully remove the existing mount without forcing the chassis.
2. Install the new SC-6536C mount and visually check the alignment of the pinion with the crown gear.
3. Manually rotate the axle before closing: the movement should be smooth, without hard spots or lateral play.
4. Conduct a test on a bench or track at low speed before stressing the drivetrain.

Common mistakes

• Mixing mount hardnesses indiscriminately: each hardness has a different behaviour. The Extra-Hard version is not always the fastest; it depends on the chassis, motor, and driving style.
• Ignoring the actual required offset: combine this mount with the recommended offset tables for your Scaleauto pinion/crown gear combination. An inadequate offset does more harm than good.
• Over-tightening the fixing screws: this can deform the mount and nullify the effect of the offset.

Frequently asked questions

What does the -0.50 mm offset mean on this mount?

It indicates that the motor is displaced 0.50 mm from the neutral reference position. This displacement modifies the distance between the pinion and crown gear, allowing for a more precise engagement depending on the transmission combination you use.

What is the purpose of the Extra-Hard version?

The Extra-Hard (red) hardness is the stiffest variant in the range. It reduces flex in the mount during acceleration and braking, keeping the geometry of the drivetrain stable. It is the preferred option in competition where maximum consistency is sought.

Is it compatible with cars other than Scaleauto?

This mount is specifically designed for Scaleauto cars with RT3 anglewinder configuration. Compatibility with other manufacturers is not documented; we do not recommend assuming it will fit other brands' chassis without prior verification.

What is the difference between the different offsets available from Scaleauto?

Scaleauto offers mounts with different offset values (positive, neutral, and negative) to adjust the pinion-crown gear engagement according to the specific tooth combination you use. Every tenth counts: choose the offset that corresponds to your specific setup.

When should I change the motor mount?

If you notice unusual noise in the transmission, irregular wear on the crown gear or pinion, or if the mount shows visible deformation, it is time to replace it. A damaged mount directly affects the efficiency and durability of the entire transmission.

The Scaleauto SC-6536C is an anglewinder motor mount for RT3 slot cars, featuring a -0.50 mm offset and Extra-Hard compound (red). Designed for Scaleauto slot cars, it ensures precise pinion-to-crown alignment and maximum drivetrain rigidity for club racing and competition use. A key tuning part for serious slot car builders looking for consistent performance on Sport-system tracks.