Industrial Technology - Linked-in Industrial Technology - Twitter Industrial Technology - News Feed
Latest Issue
Diary and Events

Advanced Engineering 2020

NEC, Birmingham(B40 1NT)

04/11/2020 - 05/11/2020

The UK's largest annual advanced manufacturing trade show, Advanced Engineering is your opportunity to (more)

Drives & Controls Exhibition

NEC, Birmingham(B40 1NT)

25/01/2021 - 27/01/2021

The show brings together key suppliers of state-of-the-art equipment representing the multi-tasking culture (more)

PPMA Show 2020

NEC, Birmingham(B40 1NT)

28/09/2021 - 30/09/2021

PPMA Show 2020 is the UK’s largest ever event dedicated to state-of-the-art processing and packaging (more)

High speed gearheads bring greater efficiency to go-karts

High speed gearheads bring greater efficiency to go-karts

Electric go-kart manufacturer Rimo is bringing more efficiency and power to the racing ring thanks to the use of planetary gears. First test runs have highlighted the benefits of the SP+ High Speed gear units from Wittenstein, with the Rimo go-karts achieving pole position on the Nürburg Ring circuit. The cutting edge planetary gearhead has helped Rimo bring power and efficiency to the track.

Rimo designs and manufactures its go-karts in-house, and exports them go-karts worldwide, some of them being constructed with two 2.8kW motors, which drive the rear wheels individually. The gears have to fit into a very small space, and must withstand high speeds and high breakdown torques. Georg Roters, head of production, invited Wittenstein to a field trial, and the SP+ High Speed gearhead took pole position with ease.

The SP+ High Speed is a low backlash planetary gearhead with output shaft. The standard version is ideally suited for high positioning accuracy and highly dynamic cyclic operation. The SP+ High Speed is particularly well suited to applications with maximum speeds during continuous operation. Because the disc brakes and wheels are mounted directly to the output shaft, Wittenstein installed a special shaft. Also, the version of the gear produced for Rimo was specified for very high speeds. Wittenstein normally approves average drives speeds of 4500 revs/min, but for Rimo speeds of 6300 revs/min were tested – with a jacked up kart without load for a period of three hours.

The test run on the Ring confirmed the positive results shown in the endurance tests. Roters explained: “The High Speed gears get 20°C less hot than regular gears with oil lubrication, and that is good for both gear and kart.” A major advantage is also the better torque speed of the SP+ High Speed, because it goes easy on the batteries. This means the karts complete their laps using considerably less power. “We’re saving about a kilo in weight per gearbox,” Roters added. “In motorsport that is a huge difference.” The original motor sound, however, comes from loudspeakers as the alpha gears are a good deal quieter than the ones Rimo has used up till now. So nothing distracts from the authentic drive experience.

Enthusing about the experience of working with Wittenstein, Roters concluded: “Twenty-five electric go-karts will definitely be built with the SP+ gearheads.” He added that, alongside the performance, Wittenstein was able to guarantee shorter delivery times. “This means we don’t need to stock any inventory.”

Download pdf

Latest news about Gearboxes

Additional Information
Text styles