Straight tooth crown z36 sidewinder

Transmission Precision: z36 Straight Cut Crown Gear for Sidewinder Mounts

The SLPL8136 crown gear from Sloting Plus is a 36-tooth straight-cut crown gear specifically designed for Sidewinder configurations, where the motor is positioned parallel to the rear axle. With a diameter of Ø17.5 mm and a shaft fit of 2.38 mm (3/32"), it fits precisely onto the most common axles used in performance and competition mounts.

Main Features

• Straight Cut Teeth: smooth and efficient transmission, providing good performance on both club tracks and recreational applications.
• 36 Teeth (z36): gear ratio that allows for balancing top speed and torque according to the chosen pinion.
• Diameter Ø17.5 mm: compact size that facilitates installation in tight chassis.
• 2.38 mm – 3/32" Shaft: widely used standard measurement in the slot racing preparation world.
• Sidewinder Configuration: optimised for mounts where the motor runs parallel to the rear axle.

Function and Performance

In a Sidewinder mount, the crown gear works in direct contact with the motor pinion, transmitting power to the rear axle transversely. The straight tooth geometry ensures a clean and predictable engagement, highly valued in applications where repeatability and reliability are paramount. Correctly choosing the crown-pinion ratio is one of the most influential adjustments on the car's final behaviour: it affects acceleration, top speed, and response to the controller.

Compatibility and Installation

This crown gear is designed for 3/32" (2.38 mm) axles, the most common in performance chassis and much of the slot spare parts market. It is essential to verify that the motor pinion's module matches this crown gear's module to ensure correct engagement and avoid premature wear. Sloting Plus manufactures this part with the dimensional control required for club racing, where tolerances make the difference between a car that runs cleanly and one that transmits vibration or noise to the rear end.

Preparation Recommendations

• Check the lateral play between the crown and pinion before closing the chassis: neither too tight nor with excessive play.
• Apply a minimal amount of specific slot gear lubricant to the teeth to prolong the lifespan of both parts.
• Check the motor alignment relative to the axle to avoid asymmetric loads on the teeth.
• If you seek higher top speed, combine it with a pinion with more teeth; if you prioritise acceleration, reduce the number of teeth on the pinion.

Frequently Asked Questions

Is this crown compatible with any Sidewinder chassis?

It is compatible with Sidewinder chassis that use a 2.38 mm (3/32") rear axle. Before installation, check the motor pinion's module to ensure correct engagement.

What is the difference between a straight-cut crown and a helical crown?

Straight teeth offer a simpler engagement to adjust and are easier to replace. Helical crowns tend to transmit power more smoothly and with less noise, but require greater precision in installation. For club use and standard preparation, straight teeth are a reliable and widely used option.

Is the z36 tooth count suitable for fast tracks?

It depends on the pinion it is combined with. With z36 on the crown and a small pinion, you will achieve higher top speed, ideal for fast layouts. For technical circuits with many tight corners, you may want to reduce the crown or increase the pinion to gain acceleration.

Does Sloting Plus manufacture this crown in other tooth counts?

Yes, Sloting Plus offers straight-cut crowns in various z configurations to adapt to different gear ratios. You can check the other options in our catalogue.

Do I need any special tools to install it?

For correct installation, it is recommended to use a crown adjuster or axle puller, tools that Sloting Plus manufactures and that facilitate installation without damaging the teeth or the axle.

The Sloting Plus SLPL8136 is a 36-tooth straight-cut spur gear designed for Sidewinder slot car configurations. With a diameter of 17.5 mm and a 3/32" (2.38 mm) axle fit, it delivers reliable and precise power transmission for club racing and performance builds. A must-have spare gear for slot car enthusiasts looking to fine-tune their drivetrain ratio.