3/32 ANGLEW soft plastic Gear 33t

NSR 33t Anglewinder Crown Gear Soft Plastic: precise transmission for competition setups

The reference NSR6633 is a 33-tooth crown gear specifically designed for anglewinder setups, made from soft plastic and with a 3/32 axle diameter. NSR is one of the leading brands in the world of competitive slot racing, and its line of soft plastic crown gears represents one of the most recognised standards among club preparers and championship racers.

Main Features

• Number of teeth: 33t
• Mounting type: anglewinder (motor angled relative to the rear axle)
• Axle: 3/32
• Material: soft plastic
• Reference: NSR6633

Function and Performance

In the anglewinder configuration, the motor is positioned at an angle relative to the rear axle. This allows for a relatively low centre of gravity combined with a direct and efficient transmission, making the choice of crown gear particularly relevant for adjusting the gear ratio and the overall behaviour of the car.

The soft material of this crown gear offers quieter and smoother engagement compared to hard plastic or nylon versions, better absorbing small alignment inaccuracies and reducing premature wear of the pinion. It is the usual choice when prioritising smooth operation and longevity during long race sessions.

With 33 teeth, this crown gear sits in the mid-high range of the NSR lineup, translating to a gear ratio that favours traction and acceleration on technical circuits with many curves, where top speed matters less than corner exit response.

Compatibility

This crown gear is compatible with NSR chassis that support anglewinder configuration and 3/32 rear axle. To determine the optimal combination of crown gear and pinion based on the motor and circuit, it is advisable to consult the gear ratio tables that NSR publishes in its technical documentation. As a general reference, the higher the number of teeth on the crown gear relative to the pinion, the more torque and acceleration are obtained at the expense of some top speed.

Installation and Preparation

Installing an anglewinder crown gear requires verifying that the attack angle between the pinion and the crown gear is correct: neither too loose (which causes tooth skipping) nor too tight (which generates friction and excessive heat). The soft plastic of this part facilitates fine adjustment, but it is always advisable to check the engagement before each intensive use session.

We recommend applying a minimal amount of specific slot transmission lubricant to the flanks of the teeth, avoiding excess that could contaminate the tyres and reduce grip.

Common Mistakes

• Mixing soft crown gears with steel pinions without properly adjusting the backlash: accelerates wear.
• Mounting the crown gear without verifying perpendicularity to the axle: generates vibration and power loss.
• Over-tightening the fixing screw on soft plastic crown gears: can deform the hub and misalign the engagement.

Frequently Asked Questions

What is the difference between a soft crown gear and a nylon or hard plastic crown gear?

Soft plastic better absorbs micro-vibrations and small misalignments of the motor-axle assembly, resulting in quieter operation and more progressive wear. Nylon or hard plastic crown gears offer more rigidity, which can be advantageous in perfectly aligned transmissions where maximum energy efficiency is sought.

Is this crown gear exclusive to anglewinder or can it be used in other configurations?

This reference is specifically designed for anglewinder setups. In sidewinder or inline configurations, the attack angle of the pinion on the crown gear is different, so NSR has specific crown gears for each type of installation. Using an anglewinder crown gear in a different configuration may compromise engagement and performance.

What gear ratio do I get by combining this 33t crown gear with different pinions?

The gear ratio is calculated by dividing the number of teeth on the crown gear by that of the pinion. With an 11t pinion, you get a ratio of 3:1, which favours acceleration. With a 9t pinion, the ratio increases to 3.67:1, further enhancing torque. NSR publishes recommended ratio guides based on the motor and type of circuit.

Which NSR motors are commonly used with this crown gear?

This crown gear is suitable for the NSR motor groups commonly used in anglewinder chassis. The choice of specific motor depends on the category in which you compete and the limitations of each championship's regulations. Check your club's rules before defining the combination.

When should the crown gear be replaced?

When excessive play in the engagement is noticed, unusual noise during operation, visibly worn or flat teeth, or when the car loses acceleration response without apparent cause in the motor or braids. Periodic visual inspection is sufficient to detect the right time for replacement.

The NSR6633 is a 33-tooth anglewinder gear in soft plastic for 3/32 axle, designed for slot car competition setups. Ideal for NSR anglewinder chassis builds, this crown gear delivers smooth engagement and consistent power transfer on technical circuits. A trusted choice for slot car racing enthusiasts looking to fine-tune their transmission ratio for better corner exit acceleration. Available at Ministry of Hobby, your reference store for slot car parts, upgrades, and competition accessories.