Aluminium angular crown gear 31 teeth 17.5mm

The NSR6231 angular crown: precision in aluminium for your Ninco AW anglewinder setup

The NSR6231 crown is a transmission component made of aluminium, featuring 31 teeth and a diameter of 17.5 mm, designed for anglewinder setups at 20° in cars compatible with the Ninco AW platform. Its reverse teeth geometry is key to its proper functioning in this type of configuration.

Technical specifications

• Reference: NSR6231
• Material: aluminium
• Number of teeth: 31T
• Diameter: 17.5 mm
• Type: angular crown with reverse teeth
• Mounting angle: anglewinder 20°
• Declared compatibility: Ninco AW
• Recommended pinion: Ø 6.75 mm

Why reverse teeth?

In an anglewinder configuration, the motor is mounted at an angle relative to the rear axle. This geometry requires the crown to operate with a different orientation than that of an inline or sidewinder setup. The reverse teeth of the NSR6231 ensure that the engagement with the pinion is correct, preventing vibrations, premature wear, and loss of efficiency in the transmission.

Function and performance

Aluminium offers a very favourable strength-to-weight ratio for transmission parts in slot cars: it absorbs vibrations well, does not suffer from temperature deformation under normal use conditions, and allows for very precise machining. With 31 teeth and 17.5 mm, this crown provides a gear ratio suited for circuits that require a balance between acceleration and top speed.

Installation and preparation

To achieve the best result, NSR recommends combining this crown with a pinion of Ø 6.75 mm. A well-adjusted engagement —without excessive play or tightness— is essential for the transmission to operate smoothly and durably. It is advisable to check the axial alignment before permanently securing the motor and to ensure that the tooth spacing is uniform around the entire crown.

Compatibility

Specifically designed for Ninco AW platforms with a 20° anglewinder configuration. If you have doubts about whether this crown fits your specific chassis, consult the manufacturer's reference or contact us before placing your order.

Frequently asked questions

What is the difference between an angular crown with reverse teeth and a standard crown?

The orientation of the teeth is reversed to adapt to the geometry of an anglewinder mounting. If a standard crown is mounted on an anglewinder setup, the engagement will not be correct, and the transmission will lose efficiency or suffer premature damage.

What pinion should I combine with the NSR6231?

NSR recommends using a pinion of Ø 6.75 mm to achieve optimal engagement with this crown.

Is it compatible with chassis other than Ninco AW?

It is designed and declared by NSR for the Ninco AW platform with a 20° anglewinder. Compatibility with other anglewinder platforms will depend on the dimensions and geometry of each specific chassis.

How many teeth is it advisable to choose according to the circuit?

A crown with 31 teeth offers a balance between acceleration and top speed. For circuits with many slow corners, it may be beneficial to reduce the number of teeth; for fast and long layouts, to increase it. Always combine it with the appropriate pinion to maintain the desired gear ratio.

Do I need special tools to mount this crown?

No specific tools are required beyond the usual ones for preparing slot cars: crown puller, Allen key, and a tool to check gear alignment. A good adjustment of the gear mesh is more important than the tool used.

NSR6231 aluminium anglewinder crown, 31 teeth, 17.5 mm diameter, reverse teeth design for Ninco AW anglewinder 20° setups. Recommended pinion Ø 6.75 mm. Precision slot car transmission part for competitive and club racing. NSR slot car spare parts available at Ministry of Hobby.