HIWIN (2049.TW) DATORKER DSC series are standard strain wave gear component sets in sizes 11-40 with 50-160 ratios, 3.5-294 N·m rated torque at 2000 r/min input, peak start/stop torque up to 647 N·m, instantaneous permissible torque up to 1180 N·m, max input speed 8500 r/min, angular transmission accuracy ≤1 arcmin (ratio ≥80), backlash down to 5 arcsec and rated life 7000 h (L10) / 35000 h (L50); the family adds lightweight (-40% weight, 36 mm hollow), heavy-load (+30% torque, 10000 h) and rotary-actuator (±6 arcsec repeatability) variants for humanoid robot joints and precision automation.
Zhongda Leader (SZSE 002896) precision strain wave gear reducer in CSG high-torque cup, SHG high-torque hat and ZSHF flat hollow shaft series, sizes 14/17/20/25/32 with ratios 50/80/100/120; rated torque 5.4-137 N·m at 2000 rpm input, permissible peak torque at start/stop 6.9-216 N·m, instantaneous max torque 34-686 N·m, max input speed 3500 rpm (grease), 10000 h design life; transmission accuracy 1.2-1.8 arc-min, lost motion 1.0-2.0 arc-min, max backlash 28-60 arc-sec, graded torsional stiffness K1-K3; for industrial robot, intelligent logistics and precision automation joints.
Haozhi DHSG-H standard hat-type harmonic (strain-wave) reducer, sizes 14-32 (plus 40/45), ratios 50/80/100/120, hollow input for center wiring; rated torque 5.4-137 N.m, transmission accuracy ≤75″ (14-17) / ≤50″ (20-32) standard and ≤50″ / ≤25″ special, 5 arc-sec repeatability, L10 ≥10,000 h / L50 ≥50,000 h life; proprietary SP tooth profile with ≥30% mesh engagement and +10% stiffness over industry standard, custom low-noise lubricant, 50% fewer parts and 1/3 less volume/weight; for light-payload 6-axis robots and press manipulators.
HSG series harmonic reducers, sizes HSG-14 to HSG-40, ratios 50-120, rated torque 6.7-363 Nm at 2000 rpm, peak 43.7-1454 Nm, input up to 8500 rpm, backlash <=10 arcsec, life 10,000-15,000 h, 0.41-7.7 kg, for cobot and humanoid joints.
Qinchuan high-precision drive, a national manufacturing single-champion, offers BX RV reducers in E/C/F/N/integrated/GS series with 50+ sizes and 200+ ratios; rated torque 98 Nm (BX10C) to 265 Nm (BX27C), up to BX700F (~6.9 kNm).
Harmonic Drive (Japan/US) invented strain wave gearing and leads the market. The CSG-2A is its second-generation cup-type component set: 10 sizes (14-65), ratios 50:1-160:1, repeated peak torque 23-3419 Nm and momentary peaks to 6175 Nm, zero backlash with high accuracy and a high-load output bearing, the de-facto standard reducer for robot joints; LW lightweight versions available.
Neugart (Germany) is a leading precision planetary gearbox maker. The PSNpro succeeds the discontinued PSN as its high-torque precision line: helical gearing for low-noise synchronisation, preloaded tapered roller bearings and a square output flange for high loads, cyclic torque from 14 to 1800 Nm, ratios 3-100, efficiency 96-97% and IP65 protection, built for high-dynamic, high-cycle applications.
SPINEA (Slovakia, now part of Timken) is the global benchmark for trochoidal (cycloidal) precision reduction gears. TwinSpin integrates a high-precision reduction mechanism with a high-capacity radial-axial output bearing in one unit: zero backlash, lost motion under 1 arcmin, average transmission error +/-18 to +/-36 arcsec. The cylindrical-case T series spans TS 60-TS 300 (9 sizes) with ratios 33-191, rated torque 37-2,940 N-m, emergency-stop capacity up to 14,700 N-m, torsional stiffness to 680 N-m/arcmin and tilting stiffness to 3,500 N-m/arcmin at only 0.86-55.7 kg; the load mounts directly on the output flange without extra bearings. Used in robotics, machine tools, medical, defense and automation.
Harmonic Drive is the inventor and global leader of strain wave (harmonic) gearing. The SHG-2A silk-hat component set (wave generator, flexspline, circular spline, output flange) is axially shorter than the cup-type CSG, spanning 10 sizes 14-65 with ratios 50-160: rated torque (L10) 7-1,236 N·m, repeated peak 23-3,419 N·m, momentary peak 46-6,175 N·m, backdriving start torque only 2.2-180 N·m, standard accuracy 1 arcmin (1.5 for size 14), zero backlash, torsional stiffness K1 0.47-54 x10^4 N·m/rad at 0.11-7.04 kg - ideal for axially constrained precision joints in humanoid/cobot shoulders, elbows and wrists.
Harmonic Drive is the inventor and global leader of strain wave (harmonic) gearing. The CSG-2A component set (wave generator, flexspline, circular spline) spans 10 sizes 14-65 with ratios 50-160: rated torque (L10) 7-1,236 N·m, repeated peak 23-3,419 N·m, momentary peak 46-6,175 N·m, standard accuracy 1 arcmin (1.5 for size 14), zero backlash and high torsional stiffness (K1 0.34-54 x10^4 N·m/rad) at only 0.09-6.7 kg - the go-to precision reducer for cobot, humanoid, semiconductor and optics joints.
Nabtesco (Japan) invented and dominates the RV cycloidal reducer used in industrial robots. The RV series uses two-stage reduction (involute center gear plus cycloidal pin stage) with an integrated angular ball main bearing: RV-E spans sizes 6E-450E and RV-C 10C-500C, rated torque 72-4,410 N·m (RV-E) and 98-4,900 N·m (RV-C) at 15 r/min output, ratios 31-192, lost motion under 1 arcmin and shock capacity of 5x rated torque, the de-facto standard for heavy industrial robot joints.
Leaderdrive (688017.SH), China's leading strain wave gear maker, offers the LCS/LCSG standard cup-shaped series built from flexspline, circular spline, wave generator and roller bearings: sizes 14-58 with 30-160 ratios, 4-969 N·m rated torque and up to 4459 N·m momentary (LCSG high-torque version ~30% above LCS), backlash ≤10 arcsec, angular transmission accuracy down to 1 arcmin, input speeds to 8500 r/min and torsional rigidity up to 71×10⁴ N·m/rad, for robots, humanoids, semiconductor/PCB equipment, machine tools and photovoltaic machinery.
