UNIVERSAL pulley Ø8 shaft 2.38 mm. BLUE

Millimetric precision in duralumin: the universal pulley that makes a difference in transmission

When power transmission depends on a few millimetres, the quality of the pulley changes everything. The Sloting Plus Ø8 Blue Universal Pulley (ref. SP079931) is made from duralumin, a lightweight and durable material that ensures perfect geometry lap after lap. The blue finish makes it easily identifiable in the transmission set and adds that touch of precision that preparers value so much.

Technical specifications

• Material: Duralumin
• Inner diameter: Ø 8 mm
• Outer diameter: Ø 10.5 mm
• Thickness: 2.49 mm
• Axle diameter: 2.38 mm
• Weight: 0.37 g
• Contents: Bag with 2 units
• Includes: M2 x 2.5 mm allen grub screw

Conical inner design: real performance on track

The conical inner profile of this pulley is not just an aesthetic detail: it is specifically designed to work efficiently with 1 mm and 1.5 mm diameter belts. The belt sits correctly in the channel, transmits motor power without losses, and withstands the demands of long sessions or competition.

Another point to highlight is its greater tolerance to misalignment between pulleys. In many setups, achieving perfect alignment between the motor shaft and the rear axle is a real challenge. This pulley absorbs small deviations without the belt coming off, reducing interruptions and improving consistency in racing.

Installation and preparation

Installation is straightforward: the pulley includes an M2 x 2.5 mm allen grub screw to securely fix it to the axle. We recommend checking that the axle has the correct diameter of 2.38 mm before installation to ensure a snug fit. After installation, check the alignment with the pulley on the opposite axle before tensioning the belt.

Who is it intended for?

This pulley fits any setup that uses a belt transmission system, both in inline configurations and other motor arrangements. It is especially useful for preparers looking to minimise rotating weight without sacrificing reliability, and for those working with 2.38 mm axles in club racing or higher-demand cars.

Frequently asked questions

Which belts is this pulley compatible with?

The SP079931 pulley is designed to work with 1 mm and 1.5 mm diameter belts thanks to its conical inner profile.

How many units are included in the bag?

Each bag contains 2 pulleys, along with the necessary M2 x 2.5 mm allen grub screw for installation.

Is the 2.38 mm axle compatible with the most common axles in slot?

The diameter of 2.38 mm corresponds to the widely used 3/32" standard in competitive slot cars. Always check the diameter of your axle before installation.

What advantage does duralumin have over plastic?

Duralumin offers greater mechanical strength and a more stable geometry over time, resulting in a more precise and durable transmission than conventional plastic pulleys.

Can it be used in inline and sidewinder configurations?

Yes, it is suitable for any motor arrangement that uses belt transmission, regardless of whether the motor is in inline, sidewinder, or anglewinder position.

How does the conical design prevent the belt from coming off?

The inner cone guides the belt towards the centre of the channel when slight misalignment occurs between pulleys, preventing lateral escape even under high load conditions.

The Sloting Plus SP079931 universal pulley, machined in duralumin with a conical inner profile, is a top choice for slot car builders seeking reliable belt transmission on 2.38 mm axles. Compatible with 1 mm and 1.5 mm belts, it delivers consistent power transfer and improved misalignment tolerance. Ideal for inline, sidewinder and anglewinder motor configurations in competitive slot racing. Sold in a pack of 2 units, including M2 x 2.5 mm allen grub screw.