UNIVERSAL pulley 6.5mm shaft 2.38mm. GOLD

Universal duralumin pulley with conical inner design for 1 and 1.5 mm belts, manufactured by Sloting Plus.

The SP079930 is a transmission pulley designed for belt mounts in slot cars. Made from duralumin, it combines lightness and strength, making it a solid option for setups where belt transmission demands precision and reliability session after session.

Technical specifications

• Material: Duralumin
• Inner diameter: 6.5 mm
• Outer diameter: 9 mm
• Thickness: 2.49 mm
• Compatible axle: 2.38 mm
• Weight: 0.24 g
• Contents: bag with 2 units
• Fixing: includes M2 x 2 mm allen grub screw
• Finish: GOLD

Function and performance

The conical inner design of this pulley is its main technical advantage. Thanks to this, it accepts both 1 mm and 1.5 mm diameter belts without losing efficiency in transmission. There is no need to have two different sets of pulleys depending on the type of belt used in each setup.

Another advantage is its greater tolerance to misalignment between the front and rear axles. In many home setups or in chassis that do not allow for perfect geometry adjustment, the belt tends to slip off if the pulley is not well designed. With this, that margin of error is significantly greater, and the belt stays in place more consistently. Additionally, the conical profile helps to improve traction, as the belt sits better in the groove.

Compatibility and installation

The reference SP079930 is designed as a UNIVERSAL pulley, making it suitable for a wide variety of setups on Scalextric, Ninco, and other systems compatible with a 2.38 mm axle. The included M2 x 2 mm allen grub screw facilitates direct attachment to the axle without the need for additional screws.

The GOLD finish is not just aesthetic: it visually identifies the size and helps to organise the workshop when working with multiple pulley references simultaneously.

Installation and preparation

When installing the pulley, it is advisable to ensure that the allen grub screw is tightly secured against the axle plane to avoid slipping under load. If the axle has any burrs or irregularities, it is recommended to smooth it out before installation to ensure a clean fit. The low weight of the part (0.24 g) means its impact on the overall balance is minimal.

Frequently asked questions

Does this pulley work for 1 mm and 1.5 mm belts?

Yes. The conical inner design is specifically intended to accommodate both belt diameters with total efficiency, without the need to change the pulley based on the type of belt you use.

How many units are included in the bag?

The bag contains 2 units, along with the M2 x 2 mm allen grub screw necessary for attachment to the axle.

What advantage does the conical design offer over a straight profile pulley?

The conical profile allows for greater tolerance to misalignment between axles, reduces the risk of the belt slipping off during the race, and improves the grip of the belt on the pulley, resulting in a more efficient transmission.

Is it compatible with 2.38 mm axles from other manufacturers?

Yes, the inner diameter of 6.5 mm and the 2.38 mm axle are standard measurements widely used in preparation slot racing. Always check the dimensions of your setup before installing it.

Does the GOLD finish have any technical function?

The GOLD finish primarily serves as a visual reference to quickly identify this reference within the Sloting Plus pulley catalogue, facilitating workshop organisation when working with multiple sizes.

The Sloting Plus SP079930 is a universal duralumin pulley designed for belt-drive slot car builds. With a 6.5 mm inner diameter, 9 mm outer diameter, 2.38 mm axle compatibility and a conical inner profile, it accepts both 1 mm and 1.5 mm belts with high efficiency. Its design improves axle misalignment tolerance and enhances traction, making it a reliable choice for slot car preparation and tuning. Compatible with Scalextric and Ninco track systems. Includes an M2 x 2 mm allen grub screw. Pack of 2 units.