KING 19K motor

Contained power and generous torque: the NSR King 19K for slot racing competition

The NSR King 19K (reference NSR3031) is one of the motors from the King family of NSR, a range designed to provide consistent and predictable performance in competitive environments. With 19,500 rpm and a torque of 271 g·cm at 12V, this long can motor represents a very balanced option: it is not the most explosive in the catalogue, but it is one of the most manageable and versatile.

Main features

• No-load speed: 19,500 rpm at 12V
• Motor torque: 271 g·cm at 12V
• Format: Long can
• Reference: NSR3031
• Manufacturer: NSR

Behaviour and performance

The range of 19,500 rpm places the King 19K in the mid-high range of slot racing motors. Its torque of 271 g·cm is notably generous for that rpm figure, resulting in clean acceleration and good response from low speeds. On track, this means the car exits corners well without the abrupt over-torque that can cause loss of traction on fast surfaces.

The long can format facilitates its integration into chassis designed for longer motors, also offering a slightly higher mass that contributes to the stability of the assembly.

Recommended applications

This motor is particularly suitable for:

• Slot cars in inline or sidewinder configuration, depending on the receiving chassis.
• Club championships with limited power regulations, where the balance between torque and speed is more decisive than peak rpm.
• Drivers who prioritise consistency over long runs rather than maximum performance on a single fast lap.
• Mid-advanced level setups where a reliable motor without surprises is sought.

Usage recommendations

As with any NSR motor, it is advisable to perform a progressive run-in before pushing it to the limit: a few initial laps at low voltage help to settle the braids and ensure optimal contact from the start. The choice of gear ratio (pinion and crown gear) will greatly influence the final character of the assembly, so it is worth adjusting it according to the layout and driving style.

NSR is one of the brands with the best availability of spare parts in the sector, so finding compatible braids, pinions, or crown gears is not a problem.

Frequently asked questions

What type of chassis is the King 19K designed for?

Being a long can motor, it is designed for chassis that accommodate this length. It is compatible with numerous competitive chassis on the market that accept NSR's King family motors. Check the specifications of your chassis before installation.

Can it be used in championships with power limits?

Yes. Its 19,500 rpm places it below the most powerful motors on the market, making it suitable for many club regulations that set speed or torque limits. Always verify the specific rules of your championship.

What is the difference between the King 19K and other motors in the NSR King range?

The NSR King range includes several motors with different combinations of rpm and torque. The 19K stands out for its generous torque (271 g·cm) relative to its revolutions, making it particularly interesting on technical layouts with many curves, compared to other models more oriented towards fast circuits and high top speeds.

What run-in is recommended for this motor?

An initial run-in of several minutes at low voltage (between 6 and 9V) is recommended, alternating directions of rotation if possible, to settle the braids and promote even wear from the beginning.

What gear ratio is most suitable with the King 19K?

It depends on the layout and the chassis. As a starting point, moderate ratios (approximately between 3.5:1 and 4:1) usually work well with motors in this range. Adjust according to the circuit: more multiplication for technical tracks, less for fast layouts.

The NSR King 19K motor (NSR3031) is a long can slot car motor delivering 19,500 rpm and 271 g·cm of torque at 12V. Designed for competition use, it offers a balanced combination of power and controllability, making it a reliable choice for club racing and intermediate-to-advanced slot car builds. Compatible with inline and sidewinder configurations depending on the chassis. Part of NSR's trusted King motor range, backed by excellent spare parts availability.