Lightened angle crown gear in ergal 31Z

The lightweight ergal crown gear from Slot.it for anglewinder that makes a difference in transmission

The reference SIGA1631E from Slot.it is a 31-tooth crown gear made from ergal — a high-strength, low-weight aluminium alloy — specifically designed for anglewinder motor setups. Its lightweight design reduces rotational inertia without sacrificing stiffness, resulting in a more agile response and cleaner power transmission from the motor to the rear axle.

Main features

• Number of teeth: 31Z
• Material: ergal (aluminium alloy)
• Design: lightweight
• Motor configuration: anglewinder
• Compatible axle diameter: 2.38 mm

Function and performance

In an anglewinder configuration, the motor is positioned at an angle to the rear axle, allowing for a combination of some advantages of both sidewinder and inline setups. The crown gear is the key component that completes this drivetrain: its number of teeth determines the final gear ratio alongside the motor pinion, and its quality directly affects noise levels, vibration, and energy efficiency.

Ergal is the usual choice among the most demanding tuners when looking to reduce rotating weight. By spinning lighter, the ergal crown gear improves acceleration and smooths out the response during regenerative braking or throttle lift-off, critical aspects in club racing.

Compatibility and installation

This crown gear is designed for 2.38 mm axles, a standard measurement in many Slot.it chassis and in many aftermarket chassis. Before installation, it is advisable to check that the motor pinion and the centre distance of the chassis are appropriate for a correct mesh. An adjustment with the right clearance — neither too loose nor too tight — prolongs the lifespan of both components and reduces track noise.

Installation and preparation

To properly secure the crown gear to the axle, we recommend cleaning the axle with a degreaser beforehand and using the appropriate retaining adhesive if the chassis requires it. Always check the lateral alignment with the pinion: even minimal misalignment can cause premature wear on ergal, as it is resistant but not as hard as steel.

Common mistakes

• Using this crown gear in sidewinder or inline configurations without checking the attack angle: the tooth geometry is designed for anglewinder.
• Over-tightening the fixing point to the axle, which can create micro-cracks in the alloy.
• Not checking the mesh with the pinion after each disassembly of the powertrain.

Frequently asked questions

What is the difference between an ergal crown gear and one made of plastic or steel?

Ergal is a lighter aluminium alloy than steel and more durable than engineering plastic. It offers an optimal balance between reduced mass — beneficial for dynamic response — and durability in competitive conditions.

Can I use this crown gear in an inline or sidewinder setup?

It is not recommended. The reference SIGA1631E is designed for anglewinder configurations. For inline or sidewinder, Slot.it offers other specific references with the appropriate tooth geometry.

Which pinions is it compatible with?

The provided information does not specify compatible pinions. To ensure a correct mesh, consult the transmission tables from Slot.it or contact us before installation.

Do I need adhesive to secure it to the axle?

It depends on the chassis and the axle fixing system. In many competition setups, a shaft retainer or a low/medium strength adhesive point is used to facilitate future disassemblies without damaging the part.

Is this crown gear suitable for Scalextric or Ninco track?

The crown gear itself is independent of the track type; what matters is compatibility with the chassis and axle. However, as a Slot.it part aimed at tuning, it fits particularly well in chassis designed for Sport track (Scaleauto, Slot.it).

The Slot.it SIGA1631E is a 31-tooth ergal alloy crown gear specifically designed for anglewinder motor configurations in 1/32 slot car racing. Compatible with 2.38 mm axles, its lightweight construction minimizes rotational inertia for sharper throttle response and cleaner power delivery. A must-have upgrade for club racers and performance builders looking to fine-tune their gear ratio with a reliable, low-mass transmission component.