THE JOINT CHALLENGE
EVERY JOINT IS A TRADE-OFF.
Actuator teams are asked to deliver more torque in less space, with better precision and longer life — at a cost that holds up in volume.
MORE TORQUE, LESS SPACE
Torque density drives everything from payload to battery life.
STIFFNESS AND PRECISION
Backlash and deflection limit control and repeatability.
LIFE UNDER REAL DUTY
Millions of reversals and repeated impact loads from walking, lifting and gripping.
COST AT SCALE
A design that works at 10 units has to work at 100,000.
SUPPLY YOU CAN COUNT ON
Domestic content and a reliable North American partner.
WE'VE SOLVED THIS PHYSICS BEFORE.
SEE WHERE
PROVEN WHERE IT MATTERS
Proven experience, redirected toward robotic motion.
POWER TRANSMISSION HERITAGE
Automatic transmissions run on planetary gearsets, and Koyo® bearings have been inside them for decades. Our needle rollers and planet pins have carried the torque and speed that turn those gearsets into motion. Our thrust bearings manage the axial loads between components. A humanoid joint asks for the same physics in a smaller envelope: higher torque density, tighter backlash, millions of reversals.
INDUSTRIAL ROBOTS
Koyo® bearings already run inside industrial robot reducers and joints, where precision and long life under continuous duty are non-negotiable.
Applied today in planetary and cycloidal reducers.
SEE ARCHITECTURE FIT
ACTUATOR ARCHITECTURE FIT
Component Support Where Joint Performance is Created.
Planetary and cycloidal reducers sit where torque, peak loads and continuous duty matter most.
PLANETARY
Compact, Efficient Transmission
Cage and roller bearings, loose needle rollers, planet pins, radial ball bearings, angular-contact support bearings and thrust washers.
CYCLOIDAL / RV REDUCER
HIGH REDUCTION AND HIGH TORQUE CAPACITY
Needle roller and cage assemblies, eccentric shaft supports, precision pins and rollers, output support bearings and thrust interfaces.
WHAT WE SUPPLY
BUILD THE ACTUATOR AROUND PROVEN COMPONENTS.
JTEKT supplies the precision components behind high-load, compact, repeatable robotic motion. We're a component partner, not a competitor: we don't build humanoid robots or complete actuator platforms.
CAGE AND ROLLER BEARINGS
Low-friction radial support with configurations used in planetary applications.
GO TO PRODUCT
LOOSE NEEDLE ROLLERS
High radial load density with application-engineered roller profile and clearance.
GO TO PRODUCT
BALL BEARINGS
Deep-groove, angular-contact, four-point-contact and other support options.
GO TO PRODUCT
THRUST BEARINGS AND WASHERS
Axial load support for compact interfaces and rotating actuator elements.
GO TO PRODUCT
PLANET AND ECCENTRIC SHAFTS
Custom geometry, lubrication features, weight reduction and advanced heat treatment.
PRECISION PINS, SHAFTS, & ROLLERS
Application-specific components developed around customer performance requirements.
GO TO PRODUCT
US PRODUCTION & ENGINEERING
ENGINEERED WITH YOU.
MADE IN THE USA.
Our North American capability base includes forming, machining, heat treatment, grinding, finishing, assembly and inspection. That breadth supports both catalog solutions and engineered components.
US-made reducer and bearing content can also help you meet your domestic content goals.
DESIGN FOR THE APPLICATION
Bring us in before the design is frozen. The earlier we're involved, the more we can shape the bearing, shaft and carrier around your joint, rather than fitting a catalog part into the space that's left.
System analysis, not just part selection. We model the bearings, shafts and housing together to help you push power density up and envelope size down.
US TECHNICAL CENTERS
PLYMOUTH, MICHIGAN
Application, development, integration, prototype manufacturing, testing and validation capabilities.
GREENVILLE, SOUTH CAROLINA
Bearing product development, prototype and manufacturing development, application engineering, testing, metallurgy and metrology.
HOW WE WORK WITH ROBOT TEAMS
FROM FIRST REVIEW TO FULL PRODUCTION
1
JOINT REVIEW
Share torque, speed, envelope and duty targets for each joint. We map where our content fits.
2
Co-Design
Our applications engineers work on bearing integration, carrier geometry and life calculations alongside yours.
3
Prototype
Full-service, in-house prototype capability at our US tech centers. Iteration happens at your pace.
4
Production Ramp
Scale to automotive volumes on automotive-grade quality systems.
START A JOINT REVIEW
WHAT'S HOLDING YOUR JOINT BACK?
Torque density, envelope, durability, cost or production scale. Share your architecture, application and development stage, and a JTEKT representative will route your inquiry to the right engineering and commercial team.
