3/32 INLINE soft plastic Gear 24t Blue

24-tooth Inline Soft Crown Gear with Aluminium Hub, in Blue

The NSR6324AL is a soft plastic crown gear with 24 teeth for a 3/32" axle, specifically designed for inline configurations — that is, with the motor arranged longitudinally, in line with the rear axle of the car. The central part is made of aluminium, which reduces rotating weight compared to fully plastic versions and improves the concentricity of the assembly.

Features and Highlights

• Tooth count: 24 teeth
• Compatible axle: 3/32"
• Mounting type: Inline
• Gear material: soft plastic, which absorbs vibrations and operates with less noise
• Central part (hub): aluminium
• Identifying colour: blue (NSR uses colours to differentiate tooth counts and material versions)
• Reference: NSR6324AL

Function and Performance

In an inline drivetrain, the crown gear works directly with the motor pinion to transmit torque to the rear axle. The soft plastic dampens impacts on the gear, prolongs the life of the pinion, and reduces noise levels on track, which is particularly appreciated during long club sessions. The aluminium hub adds rigidity to the central assembly without adding unnecessary mass to the periphery.

With 24 teeth, this crown gear defines a gear ratio that, combined with the appropriate pinion, allows for a balance between acceleration and top speed depending on the layout. It is a commonly used tooth count for medium-length circuits.

Compatibility and Mounting

Designed for inline chassis with a 3/32" rear axle. It is commonly found in NSR mounts with motors in inline position such as the Shark or King, although it is advisable to always check the wheelbase of the chassis to select the correct complementary pinion. NSR offers a wide range of pinions to precisely adjust the gear ratio.

Common Mistakes

• Confusing inline with sidewinder: in sidewinder, the motor is parallel to the rear axle; in inline, it is perpendicular. This crown gear is exclusively for inline mounts.
• Not checking the axle diameter: ensure that your chassis uses a 3/32" axle and not 2mm before mounting.
• Mixing soft plastic with a very hard pinion: while possible, a steel pinion in good condition prolongs the life of the soft crown gear.

Frequently Asked Questions

What is the difference between a soft crown gear and a standard plastic one?

Soft plastic has a greater capacity for absorbing vibrations and operates with less noise. Additionally, it is more tolerant of small alignment inaccuracies, although it wears out slightly faster under very intensive use conditions.

Why is the central part made of aluminium and not plastic?

The aluminium hub improves concentricity and rigidity of the mounting on the axle, reducing the eccentric torque that wears out the transmission. Furthermore, by concentrating the aluminium in the centre (and not in the teeth), the added mass is minimal.

Can I use this crown gear on a sidewinder chassis?

No. This crown gear is designed for inline mounts (longitudinal motor). In a sidewinder chassis, the geometry of the transmission is different, and specific crown gears for that configuration are used.

What pinion should I combine with this 24-tooth crown gear?

It depends on the motor, chassis, and circuit. NSR offers pinions with different tooth counts for 3/32" axles. The pinion/crown ratio defines top speed and acceleration: more teeth on the pinion means higher top speed; fewer means more acceleration. Consult the NSR ratio chart to fine-tune according to your track.

Does the blue colour have any technical function?

The colour is a visual code from NSR to quickly identify the tooth count and material version within their range. Blue corresponds to the aluminium (AL) version of this 24-tooth crown gear.

NSR6324AL — 24-tooth soft plastic inline gear with aluminium hub, 3/32 axle, in blue. Designed for inline slot car configurations, this NSR crown gear combines a soft plastic ring for smooth and quiet meshing with a lightweight aluminium centre for improved concentricity. Compatible with 3/32" rear axles, it is a popular choice among club racers looking to fine-tune their transmission ratio on medium-length tracks. Pairs with NSR pinions for precise gear ratio adjustment on Shark, King and compatible inline motor setups.