Nylon pinion 8t 5mm M50

Nylon 8-tooth pinion for 5 mm axle — precise transmission in module 50

The MB-12108 nylon pinion is a transmission component made from nylon, featuring 8 teeth, a shaft diameter of 5 mm, and module 50. A simple yet critical pinion: the gear ratio you establish between the pinion and crown gear largely determines the acceleration response, top speed, and torque available at each point on the circuit.

Function and performance

Nylon offers quiet engagement and some absorption capability against minor alignment irregularities, making it a common choice in club setups or test benches where different transmission configurations are evaluated. Being a softer material than steel, wear primarily occurs on the pinion — protecting the crown gear — which facilitates economical replacement and adjustment of the drivetrain.

Compatibility and installation

This pinion is designed for 5 mm diameter axles and operates in module 50, so it must be paired with crown gears of the same module to ensure correct meshing. Always check before installation:

• That the crown gear's module matches the module 50 of this pinion.
• That the motor or drivetrain axle measures exactly 5 mm.
• The axial adjustment: the pinion must be aligned with the crown gear without excessive lateral play.

Secure the pinion using your usual method — set screw or specific adhesive for axles — and check the gear mesh before running. A mesh that is too tight generates heat and premature wear; too loose causes skipping and loss of efficiency.

Common mistakes

• Mixing different modules: a module 50 pinion does not mesh correctly with a crown gear of a different module. Always check the specifications of both parts.
• Ignoring lateral alignment: although nylon is more forgiving than steel, significant misalignment accelerates wear and can cause gear disengagement.
• Not checking the tightness: a pinion that spins freely on the axle nullifies the entire transmission. Check the fastening before each session if using temporary adhesive.

Frequently asked questions

How many pinions are included in the pack?

According to the manufacturer's description, this is a set of nylon pinions with 8 teeth, 5 mm diameter, and module 50. We recommend confirming the exact quantity of units in the specification or contacting us if you need clarification before ordering.

Which crown gears is this pinion compatible with?

With any crown gear of module 50. The module must match exactly for correct meshing; you can choose the number of teeth on the crown gear based on the gear ratio you seek for your circuit and motor.

Does nylon withstand continuous use in competition?

Nylon is suitable for club use and recreational sessions. In high-level competition or with high-power motors, some tuners opt for metal pinions for greater durability. However, the nylon pinion has the advantage of protecting the crown gear from greater wear.

How do I know if the pinion is properly secured to the axle?

With the motor stopped, try to turn the pinion manually: it should not slip on the axle. If it does, reinforce the fastening with the appropriate method (set screw or axle fastening adhesive) before running.

Can I combine this pinion with crown gears from other brands?

Yes, as long as the crown gear is of module 50. The module is the determining parameter for gear meshing compatibility, regardless of the brand.

The MB-12108 is a nylon pinion gear with 8 teeth, 5 mm axle diameter and module 50, designed for slot car transmission setups. Compatible with any module 50 crown gear, it offers smooth and quiet meshing while protecting the crown from premature wear. An essential spare part for slot car builders and club racers looking to fine-tune their gear ratio and drivetrain performance.