Development of Ultra-small
Tapered Roller Bearing
- Customer outlineRobot and reduction gear manufacturers
- ProductReduction gear
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Problems
- With the size reduction of robots, we want to reduce the size of robot wrists.
- We want the robots to be able to hold heavier objects.
- While we want to use tapered roller bearings, which can take a heavy weight, for the wrist parts, conventional products are too big and aren’t suited for size reduction of the wrist. Ball bearings, though, do not have enough rigidity.
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Solutions and Results
- Miniaturizing tapered roller bearings
- Fundamental review of the production process including the conveyance method
- Developing dedicated jigs for raceway polishing
- Using resin cages
Achievements
- Extreme size reduction of tapered roller bearings
(new outside diameter of 26 mm, assembled bearing width of 8 mm, and weight of 18 g) - 50% narrowed width, 60% lighter weight
- Maintained the same level of rigidity as the smallest conventional products through the use of resin cages
(or, around 3 times higher rigidity than a deep groove ball bearing with the same size!)
A Message from JTEKT
With recent years seeing a growing demand for down-sizing of industrial products, tapered roller bearings also increasingly need to be down-sized. In this case, we were able to achieve down-sizing by fundamental review of production process, including conveyance method.
We achieved a massive miniaturization over previous products (50% slimmer, 60% lighter) by improving our development processes including transportation and polishing methods. With the development of the present product, we have allowed our customers to enjoy the same high level of rigidity with a smaller and lighter bearing.
Product
Tapered Roller Bearing
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