Spinea

Spinea is a maker of precision gearboxes from Prešov in Slovakia, owned according to the Robolupa catalogue by the US group Timken. The company builds no robots. It sells the component that decides how accurately and how stiffly a joint moves: a cycloidal gearbox integrated with its bearing. For arm designers it is an alternative to the strain-wave gears from Harmonic Drive and the cycloidal drives from Nabtesco.

The flagship product is the TwinSpin: the maker describes it as the full integration of a high-precision cycloidal reducer and a radial-axial bearing in one module. The families split into the T and E series (cylindrical or flanged housing), H (hollow shaft, so cables can pass through), M (miniature), G (with a new bearing arrangement), W, and J, or JustSpin, described as the lightest TwinSpin generation, developed for highly dynamic robotic and automation applications. As shared features the firm lists high reduction ratio, high kinematic accuracy, low lost motion, high moment capacity and stiffness in a compact design. The DriveSpin combines the gearbox with an AC servomotor in one unit.

The maker states that its solutions cover all axes of KUKA robots, which shows well that this is a supplier for industrial arms rather than humanoids.

Why does a cycloidal gearbox matter? In an industrial robot joint it governs payload, stiffness and repeatability, so it feeds the very figures you read in a datasheet (“How to Read a Robot Datasheet”). A cycloidal gearbox is usually heavier and bulkier than a strain-wave one but tougher under shock loads, while strain-wave gearing dominates in light cobots and humanoids. We unpack that trade-off in “Actuators in Humanoid Robots”. Among cobots such as the UR20 from Universal Robots or the Doosan M0609 from Doosan Robotics we have no evidence of Spinea.

In a robot's cost, gearboxes are among the most expensive joint parts, which carries through to the price of the whole arm (“Humanoid Robot TCO: How to Calculate Total Cost”). For buyers in factories settings, spare-part serviceability counts, and in Poland that usually means going to a drive-component distributor or a group branch. Prices are not published.

The maker indicates that the gearboxes go into robotics, automation, machine tools, medical equipment, aerospace, military applications, textiles and packaging. Its design description lists integrated bearings, trochoidal gearing, output sealing and a member that converts planetary motion into rotary motion. This shows that the TwinSpin is a complete joint module rather than just a set of gears. For the designer it means fewer parts to select, but also a stronger dependence on a single supplier.