Crown gear Z31 x 16.8 angular gear 11 degrees SILVER

31-Tooth Angle Gear Crown for Demanding Anglewinder Setups

The Z31 x 16.8 Angle Gear Crown 11 Degrees Silver (SP072531) from Sloting Plus is a transmission component aimed at those who build or refine chassis with an anglewinder configuration. Its 31 teeth, 16.8 mm diameter, and 11-degree working angle place it in a very specific point in the catalogue: it is not a general-use crown, but a specific solution for chassis architectures that require the crown to operate on a slightly inclined plane relative to the rear axle.

Technical Features

• Number of Teeth: Z31
• Diameter: 16.8 mm
• Width: 4.25 mm
• Gear Angle: 11 degrees
• Axle Diameter: 3/32 (2.38 mm)
• Weight: 0.6 g
• Finish: silver
• Mounting Type: anglewinder

Function and Performance

The 11-degree angle is not a minor detail: it determines the correct transmission of force between the motor pinion and the crown when the motor is mounted at an inclined position relative to the rear axle, as occurs in anglewinder configurations. If a straight gear crown (0 degrees) is used in this type of mounting, the contact between teeth is poor, wear accelerates, and transmission efficiency is lost. With the SP072531, the gearing is smooth, noise is reduced, and the lifespan of both parts is significantly improved.

With 31 teeth and a diameter of 16.8 mm, this crown offers a moderate-high gear ratio when combined with pinions of 9 to 11 teeth, suitable for circuits with long straights as well as technical layouts where corner exit acceleration is more prominent. The weight of 0.6 g helps keep unsprung mass to a minimum, something that club tuners particularly value.

Compatibility

Sloting Plus expressly states that this crown is compatible with:

• NSR Triangular Motor Pods (the reference in anglewinder design for 1/32 scale)
• SC RT4 Motor Pod
• 3D-Printed Chassis designed with a tighter angle parallel to the axle

The 3/32 axle (2.38 mm) is the most widely used standard in 1/32 slot, making installation straightforward on the vast majority of axles available on the market. It is important to verify the compatibility of the angle with the motor pinion to be used: both parts must share the same working angle to ensure correct gearing.

Installation and Preparation

Before installing the crown, it is advisable to check that the axle is perfectly straight and that the motor pod does not have tensions that could misalign the gearing. A slightly tight fit on the axle, without forcing, ensures that the crown does not slip under load. Some tuners apply a drop of axle retainer (low-strength fixing liquid) for added security without hindering future replacements.

During the initial run-in, it is advisable to apply a minimal amount of specific gear lubricant to the teeth and let the assembly run under low load for the first few minutes. This promotes settling between the crown and pinion and extends the lifespan of both.

Common Mistakes

• Combining this crown with a straight gear pinion: the 11-degree angle requires a pinion with the same angle. Otherwise, the contact is incorrect and premature wear is guaranteed.
• Over-tightening the fixing screw to the axle: this can deform the crown or create hard spots during rotation.
• Ignoring lateral alignment: even if the diameter and teeth match, a lateral misalignment of tenths of a millimetre generates vibration and noise.

Who is this Crown for?

It is designed for enthusiasts who mount or modify anglewinder chassis in 1/32, whether on commercial motor pods like those from NSR or on 3D-printed chassis designed with this system. It is also an interesting option for those looking to explore different gear ratios than usual in their setups, taking advantage of the extensive catalogue of crowns from Sloting Plus to adjust the car's response to each circuit.

Frequently Asked Questions

Can I use this crown in a sidewinder or inline setup?

No. This crown is specifically designed for anglewinder setups, where the motor operates at an angle to the rear axle. In a sidewinder or inline, the motor is parallel or perpendicular to the axle, and straight gear crowns (0 degrees) are used. Using the SP072531 in those configurations would result in incorrect gearing.

What pinion should I use with this crown?

You need a pinion with the same working angle (11 degrees). Sloting Plus offers angular pinions in various tooth counts to combine with this crown. Check the resulting gear ratio according to the number of teeth on the pinion you choose.

Is it compatible with all 3/32 axles?

Yes, the diameter of 2.38 mm (3/32) is the most common standard in 1/32. However, ensure that the axle is in good condition and free from deformations before mounting the crown.

How much does it weigh and why does it matter?

It weighs 0.6 g. In the context of a competition chassis, reducing the weight of rotating parts decreases rotational inertia, resulting in a more responsive acceleration and braking.

Which NSR motor pods is it compatible with?

Sloting Plus's indication refers to NSR triangular motor pods in general, which use anglewinder configuration with this type of angle. If you have questions about a specific NSR motor pod, check the required working angle before placing your order.

Do I need to lubricate the gearing?

Yes. A minimal amount of specific slot gear lubricant is recommended. Excess lubricant can attract dirt and ultimately harm the assembly.

The Sloting Plus SP072531 is a 31-tooth anglewinder crown gear (Z31, 16.8 mm diameter, 11-degree angle, silver finish) designed for 1/32 scale slot car chassis with anglewinder motor configurations. Compatible with NSR triangular motor pods, SC RT4 motor pod, and 3D-printed chassis with a closed angle layout. 3/32 axle (2.38 mm), 0.6 g weight. Ideal for club racers and scratch builders looking for precise gear transmission in anglewinder setups.