maxon (Switzerland) is a world-leading precision drive manufacturer. The EC frameless DT (Dynamic Torque) family is an inner-rotor frameless torque motor kit (stator + rotor) with large hollow shaft, low-voltage DC and full potting: four frames DT38–DT85 (42–90 mm OD), 0.13–3.42 N·m continuous torque with heatsink, up to 9.63 N·m peak, 3,000–15,000 rpm max speed, cogging as low as 0.5 mNm, torque density up to 4.5 N·m/kg, -40 to +100 °C. Optional integrated TSX MAG incremental or TSX RIO 19-bit absolute encoder; pairs with maxon strain-wave/planetary gears and EPOS/ESCON controllers into High Precision/Efficiency Joints for humanoid and quadruped robots, cobots, surgical robots and exoskeletons, semiconductor handling, and aerospace actuators.
TQ-RoboDrive (TQ-Systems, Germany) commercialized the DLR (German Aerospace Center) motor design and leads in frameless torque motors for humanoids and cobots - PAL Robotics calls its torque-to-weight ratio 'unsurpassed'. The premium ILM (Innenlaeufer) family spans 14 kits from ILM25 to ILM115: rated torque 0.033-3.9 N-m, 24/48 V, up to 22,378 rpm; the cost-optimized ILM-E series adds 9 models (ILM-E50 to E85) at 0.32-3.3 N-m, 48 V with the same torque per kilogram. Stator-rotor frameless kits with spacious hollow shafts, high copper fill factor for low thermal loss, 100% Made in Germany - used in humanoids, cobots, exoskeletons, surgical robots, aerospace and precision automation.
The KBM series embeds directly into the machine with fully encapsulated stators and a through-bore rotor supported by the machine's own bearings, eliminating couplings and gearboxes; 14 frames across servo (10-45) and torquer (43-260) form factors, 120-480 Vac, peak stall torque up to 12,812 N·m, widely used in humanoid/cobot joints, gimbals and precision rotary tables.
Yobotics' in-house hydraulic servo valve: 6 mm spool, 35/28 MPa working pressure, 4-40 L/min rated flow, <=10 ms step response, +/-0.1% control accuracy and >=130 Hz bandwidth - high-response, high-precision flow/pressure control for hydraulic arms and hydraulically actuated humanoid/quadruped joints.
MOONS' DCU series coreless brushed DC motors span Ø8-24 mm with 0.3-9.5 W rated power and no-load speed up to 16,000 rpm. The ironless cup rotor eliminates cogging and iron loss for high acceleration and low inertia, and the self-supporting cup winding is protected by invention patent ZL201510121440.7. DCU08017 weighs only 7.1 g; gearbox, encoder and voltage variants suit frequent start-stop handheld devices and robot end-effectors.
ZHAOWEI, a national champion in micro transmission systems, offers MC/CL coreless brushless motors from 4 to 26 mm diameter with stall torque up to 627 mNm (MC2250) and up to 86% efficiency, integrated with in-house planetary gearboxes and encoders as micro drive systems powering dexterous-hand finger joints and other end-effectors of humanoid robots.
Kinco FMH frameless torque motors power humanoid rotary/linear joint modules: 38-120 mm outer diameters cover waist, shoulder, elbow, wrist, hip, knee and ankle joints; vacuum-potted stator for low temperature rise and segmented core with high-permeability silicon steel for high torque density; ultra-thin large-bore frame simplifies joint cabling; 48 VDC with 0.13/0.6/1.7 N·m rated torque (FMH03807/05014/08513), up to 4.26 N·m peak torque and 1500-3400 rpm rated speed.
The JP3 is TiMOTION’s inline linear actuator for industrial and agricultural equipment: up to 2,000 N force, 20-1000 mm stroke, 3.5 mm/s at max load and 23.5 mm/s no-load speed, 12/24 V DC (PTC option), IP69K (static) ingress protection, UL73 certified, -5 to +65°C operation, with optional dual NPN Hall sensors for position feedback and synchronization.
