Removable pinion 15d. M50 ø8.0mm in Ergal for 2mm axle with fixation via M2mm screw.

Precision from the pinion: Ergal at the service of your slot transmission

The pinion is one of the most critical links in the entire transmission chain of a competition slot car. A poorly fitted component, with too much play or made from a soft material, directly translates into performance loss, accelerated wear, and lack of consistency during a race. The Removable Pinion SC-1075E80 from Scaleauto, with 15 teeth, module 50, and an outer diameter of 8.0 mm, is designed to meet the demands of the most discerning tuners.

Main features

• Teeth: 15
• Module: 50 (M50)
• Outer diameter: 8.0 mm
• Material: Ergal (high-strength, lightweight aluminium alloy)
• Compatible axle diameter: 2 mm
• Fixing system: M2 screw
• Reference: SC-1075E80
• Manufacturer: Scaleauto

Ergal in the transmission: why material matters

Ergal is an aluminium alloy known in the world of dynamic modelling and competition for offering a very favourable strength-to-weight ratio. Compared to standard plastic pinions, Ergal provides greater dimensional rigidity, resulting in a more precise engagement with the crown gear and a more direct transmission of torque without flexing. At the same time, its low weight compared to steel reduces rotational inertia, which is particularly noticeable in response to acceleration changes.

For serious slot car preparation, switching from a plastic pinion to one made of Ergal is one of the most valued steps by club tuners: the car responds more faithfully to the trigger, and the transmission withstands longer race sessions better.

Removable fixing system using M2 screw

The removable feature is not a minor detail. This pinion is secured to the 2 mm axle using an M2 screw, allowing it to be disassembled and reassembled without damaging the axle or the pinion itself. This greatly facilitates the adjustment of gear ratios: changing the pinion to adapt the crown/pinion ratio to different tracks, straight lengths, or motor types without needing to replace parts due to mounting wear. In competition, where adjustments between sessions are common, this feature makes a significant difference compared to press-fit pinions.

Assembly and preparation

Assembly is straightforward, but it is important to consider a few points to get the most out of this component:

• Ensure that the 2 mm axle is clean and free of burrs before inserting the pinion.
• Correctly align the pinion with the crown gear before tightening the M2 screw, checking that the engagement is uniform all around.
• Do not overtighten the screw: while Ergal is strong, excessive tightening can mark the axle or deform the housing.
• Periodically check the condition of the fixing screw, especially during prolonged competition sessions.

Compatibility and application

This pinion is designed for 2 mm axles, a common measurement in a wide variety of competition and prepared slot cars. It is compatible with crown gears of module 50, so it is advisable to verify that the crown mounted on the car corresponds to that same module to ensure correct engagement and avoid premature wear.

Scaleauto is a reference brand in the slot preparation segment, with a catalogue of spare parts and precision components aimed at both advanced hobbyists and club or series competitors. Its parts are designed to work together, so combining this pinion with crowns and axles from the same brand is always a guarantee of fit.

Common mistakes to avoid

• Confusing the module: Not all 15-tooth pinions are the same. Module 50 defines the size of the teeth; mixing different modules between pinion and crown leads to poor engagement and accelerated wear.
• Ignoring lateral play: A well-secured pinion but misaligned with the crown generates vibrations and loss of efficiency. Taking the time to align correctly is essential.
• Assembling without lubrication: Although Ergal is durable, minimal lubrication at the engagement prolongs the lifespan of the crown-pinion assembly.

Frequently asked questions

Is this pinion compatible with any crown of module 50?

Yes, as long as the crown is of module 50. The module must match between pinion and crown to ensure correct engagement. Check the module of your crown before combining it with this pinion.

What advantage does Ergal have over plastic in a pinion?

Ergal offers greater rigidity, better torque transmission, and increased durability against wear. Additionally, its low weight reduces rotational inertia, improving the car's response to acceleration changes.

Can I mount and dismount this pinion multiple times without damaging it?

Yes, the fixing system using the M2 screw is designed for that purpose. Unlike press-fit pinions, this system allows repeated disassemblies without damaging the axle or the pinion, provided it is handled carefully and the screw is not forced.

What tool is used to tighten the M2 screw?

The M2 screw requires an Allen key of the appropriate size for M2 (usually 1.5 mm). It is advisable to use a quality key to avoid rounding the head of the screw.

Is this pinion suitable for Sidewinder, Inline, and Anglewinder configurations?

The pinion itself is compatible with any motor configuration, as its function is to transmit the movement from the axle to the transmission assembly. What determines compatibility with each configuration is the position and type of crown it is paired with, not the pinion itself.

The Scaleauto SC-1075E80 is a 15-tooth removable pinion gear, module 50, 8.0 mm outer diameter, machined in Ergal aluminium alloy for 2 mm axles, secured with an M2 screw. Designed for slot car competition and advanced preparation, it delivers precise mesh, reduced rotational inertia, and reliable performance across multiple assembly and disassembly cycles. A key upgrade for club racers and serious hobbyists seeking consistent transmission on any slot car setup.