Kumera Corporation products

Kumera Multi Stage Helical and Bevel-Helical gearbox range includes 20 gearbox sizes from two- to five-stages. The range consist of F-, G- and D-series which are optimally divided to meet the torque and ratio requirements. All the sizes are available in helical and bevel-helical versions and can be equipped with either solid or hollow output shaft. The modular structure of the gearboxes enables the installation of additional equipment onto the gearbox. Thus a single gearbox can be transformed into a variety of applications and mounting arrangements.

Kumera LX-gearbox series is specifically designed for fast rotating shafts such as roll applications. The range includes 16 gear unit sizes which are optimally divided to meet required torque ranges and ratio requirements. Integrated lubrication canals and gear wheels manufactured with high accuracy have resulted in compact dimensions with high torque range from 1 to 400 kNm. Maintenance-free labyrinth seals are integrated into the gearbox housing. Labyrinth seals cause neither wear nor friction on the rotating shaft. The gearbox can be easily connected to a central lubrication system or gearboxes can be equipped with a separate lubrication unit.

The KA and RA gearbox series are specially designed for fast rotating shafts such as pump applications. One stage bevel gearboxes are normally used when the shaft line has to be turned to a 90 degrees angle. The gearbox housing design allows both horizontal and vertical shafts. The range includes 10 gearbox sizes, which are optimally divided to meet required torque ranges and ratio requirements. High accuracy spiral bevel gears can be manufactured either with lapped or ground teeth depending on the rotation speed and load conditions. The gearbox can be easily connected to a central lubrication system or gearboxes can be delivered with a separate lubrication unit.

The SF-, SG-, E-gearbox series is specifically designed for vertical shaft applications with high external loads. These ranges include totally 30 gear unit sizes which are optimally divided to meet required torque ranges, ratios and shaft end load requirements. Output shaft, bearings and housing are designed to withstand high external loads. E-series gearbox can be equipped with flanged output shaft to achieve highest possible load capacity and bending stiffness. SF- and SG-series is equipped with lip seals. E-series gearboxes are equipped with drywell seals on output shaft and labyrinth seal on input shaft to ensure maximum usability. Gearbox can be connected to structure with standard cast iron connection foot or easy customizable plate foot to maximize versatility in final assembly.

The Covera worm gearbox series is designed especially for non-continuous operation. Thanks to its Concave – Convex tooth profile it can take higher peakloads than conventional profiled worm gears. The reason Covera tooth profile is stronger than a conventional worm tooth profile is that the surface pressure is spread on large area causing a significant surface pressure reduction. The noise level is substantially lower than that of vertical or bevel gears.

Kumera has designed and manufactured thousands of front-end gearboxes to the maritime segment over the last 50 years, historically also under the brand name Norgear.

Bevel gearboxes can be used for a range of different applications, and traditionally most bevel gearboxes delivered by Kumera have been utilized for bow thruster applications.

The product portfolio of Kumera Marine AS in Hjelseth  is made up of 3- and 4-bladed propellers designed with the help of modern tailor-made computer programs, and manufactured of high quality materials.