Junior Motor 19,500 Rpm 275 gr/cm 12v

The Sideways long box motor for those seeking power and balanced control

The Junior SWMJUNIOR motor from Sideways is a long box (Long Box) proposal designed for drivers looking for solid performance without sacrificing track behaviour. Its 19,500 RPM at 12V and a torque of 275 gr/cm place it in the high range of the segment, with a progressive power delivery that facilitates work in technical areas and maintains competitiveness on the straights.

Main features

• Speed: 19,500 RPM at 12V
• Torque: 275 gr/cm
• Magnetic effect: 7 gr. UMS (14 gr. MPM)
• Format: open long box (Long Box)
• Operating voltage: 12V

The long box format favours heat dissipation, which is especially relevant in long sessions or endurance races where motor temperature can become a limiting factor. The natural ventilation allowed by this design helps maintain performance stability throughout the race.

Behaviour and performance on track

One of the most valued aspects of the SWMJUNIOR is its magnetic effect measured at 7 gr. UMS. This level of attraction provides the necessary support to improve cornering trajectories without generating excessive load on the transmission or penalising chassis agility. The result is a balanced behaviour: progressive braking, good cornering speed, and decisive acceleration without sharp peaks that complicate throttle management.

The linear power delivery makes it an especially rewarding motor for circuits with a mix of fast sections and technical areas, where predictability is as important as top speed.

Recommended applications

The Junior is designed for GT and touring car categories in 1/32 scale, a natural territory for Sideways as a brand specialised in this segment. Its standard axle accommodates a wide variety of pinions, allowing for final drive adjustments based on the layout: short ratios for circuits with many curves, long ratios for smoother tracks with pronounced straights.

The wiring connections are prepared for direct installation, without the need for prior modifications, making replacement or tuning easier even in the pits during a competition day.

Usage recommendations

As with any long box motor, it is advisable to check the clearance with the crown gear before final assembly and ensure that the chosen pinion is correctly aligned to avoid premature wear. A progressive break-in during the first minutes of use helps settle the internal components and prolong the motor's lifespan. Periodically checking the braids of the car ensures that the motor receives the correct power supply and operates at its optimal performance point.

Frequently asked questions

What competition categories is the Junior SWMJUNIOR motor designed for?

It is primarily designed for GT and touring car categories in 1/32 scale, where a balance between speed and control is sought. Its moderate magnetic effect makes it compatible with regulations that limit magnetic attraction.

What is the difference of the long box format compared to other motors?

The Long Box (open long box) format allows for greater natural cooling of the motor during the race, resulting in greater thermal stability and a slower performance drop in long-duration sessions.

Is it compatible with standard pinions on the market?

Yes, its standard axle accepts a wide range of market pinions, allowing for final drive adaptation to the characteristics of each circuit without the need for special parts.

What does the value of 7 gr. UMS in the magnetic effect mean?

The UMS (Universal Measurement System) is the international reference standard for measuring the magnetic effect of slot motors. 7 gr. UMS is equivalent to 14 gr. in the MPM system, indicating the level of attraction of the motor to the metal track, directly influencing grip and stability in corners.

Does it require any break-in process before using it in competition?

Although not essential, performing a gentle break-in during the first minutes —with reduced voltage and without excessive load— helps settle the internal components and achieve maximum performance from the start.

Which Sideways cars is this motor compatible with?

The SWMJUNIOR is a replacement from the Sideways motor range for 1/32 scale long box cars. To confirm exact compatibility with a specific model from the Sideways catalogue, we recommend checking the car's specifications or contacting us.

The Sideways SWMJUNIOR Junior motor delivers 19,500 RPM at 12V with 275 gr/cm torque and a 7 gr. UMS magnetic effect, making it a reliable long box slot car motor for GT and touring car racing in 1/32 scale. Ideal for club competition and dedicated hobbyists looking for consistent power delivery and balanced handling. Compatible with standard pinions for flexible gear ratio tuning across different track layouts.