The Harmonic Drive CSG/CSF component sets (wave generator, flexspline, circular spline) are the industry-standard strain wave gears: 17 frame sizes CSG-5 to CSG-45, ratios 30-160, rated torque 0.94-921 Nm with peak 2.9-2940 Nm, speeds to 6500-18000 rpm and backlash ≤10-20 arc-sec - single-stage zero-backlash transmission with high torque density for humanoid rotary joints, cobots and precision tables.
Harmonic Drive LLC (USA) CSF/CSG-2A strain-wave component sets comprise wave generator, flexspline and circular spline with zero backlash, high torsional stiffness and coaxial input/output, the core gearing for custom high-performance servo actuators; CSF standard-torque versions span 30:1-160:1 with 23-3400 Nm peak torque, CSG high-torque versions add 30% torque and 43% longer 10,000 h life at 50:1-160:1; used in industrial robotics, semiconductor equipment and spaceflight.
Haydon Kerk Pittman (AMETEK, USA) G40A is a Ø40 mm high-torque spur gearbox with ratios 4:1-864:1 in 1-4 stages, 14.12 Nm (2000 oz-in) max load across the range, efficiency 0.65-0.90, 255.1-425.2 g and 35.6-58.4 mm long; official gearmotor length tables cover DC040B/DC054B brushed and EC057C brushless pairings for robot joints, AGV drives and heavy positioning.
Haydon Kerk Pittman (AMETEK, USA) G35A is a Ø35 mm spur gearbox with 11 ratios from 6.3:1 to 1803.6:1 in 1-2 stages; max load 0.706 Nm (100 oz-in) standard, 1.130 Nm (160 oz-in) HT and 1.236 Nm (175 oz-in) WF; only 66.6-92.1 g with gearhead length 24.6-29.6 mm and efficiency 0.48-0.81, pairing with Pittman motors as gearmotors for robot joints, pumps and precision positioning.
Haydon Kerk Pittman (AMETEK, USA) G51A is a Ø51 mm spur gearbox with stock ratios 5.9:1-4,732.5:1 in a compact 34.9-38.8 mm length, max load 1.236 Nm (175 oz-in) standard or 2.118 Nm (300 oz-in) in the HT high-torque version, efficiency 0.48-0.81 and weight 167.3-231.9 g; the very high ratios serve heavy low-speed joints, rotary tables and winding mechanisms when paired with Pittman DC/BLDC motors.
Haydon Kerk Pittman (AMETEK, USA) G30A is a Ø30 mm spur gearbox with 1-4 stages and stock ratios 4:1-1296:1, max load 2.47-8.83 Nm (350-1,250 oz-in), efficiency 0.66-0.90, length 32.64-50.17 mm and weight 110.6-155.9 g; metal gears in a precision housing bolt directly to DC026C/DC030B/DC040B/EC044A Pittman motors for compact high-ratio drives in robot joints, conveyors and positioning mechanisms.
Haydon Kerk Pittman (AMETEK, USA) PLG42S is a 42 mm planetary gearbox covering ratios 4:1-512:1 in 1-3 stages: max load 3.5-14 Nm (496-1,983 oz-in), stage efficiency 90%/81%/73%, weight 270-880 g and length 47.6-71.2 mm with CW output; pairable with DC040B and other motors as gearmotors for robot joints, medical devices and precision automation.
Haydon Kerk Pittman (AMETEK, USA) Pittman PLG52 is a 52 mm-frame precision planetary gearbox with 13 standard ratios from 4.5:1 to 400:1 across 1-3 stages: single-stage torque to 1.2 Nm and two/three-stage to 24 Nm (3399 oz-in), efficiency of 0.90/0.81/0.73 by stage count, mass 560-880 g and length 50-80.5 mm; it couples directly to Pittman brushed/brushless DC and hybrid stepper motors for robot joints, medical devices and lab automation.
Harmonic Drive SHG-2A silk-hat component sets: 9 sizes from 14 to 65, ratios 50/80/100/120/160, rated L10 torque 7-1,236 Nm, repeated peak 23-3,419 Nm, momentary peak up to 6,175 Nm, standard accuracy ≤1 arcmin, mass 0.11-7.04 kg. The flanged hat-shaped flexspline is stiffer and more torque-dense than cup types and pairs with crossed-roller bearings to carry combined axial/radial joint loads in humanoids and high-payload servo turntables.
Harmonic Drive CSD-2A cup-type component sets (wave generator, flexspline and circular spline supplied separately for customer integration): sizes 14-50, ratios 50/80/100, rated L10 torque 3.7-329 Nm, repeated peak 12-686 Nm, momentary peak 24-1,440 Nm, standard accuracy ≤1 arcmin, mass 0.29-1.9 kg, K1 torsional stiffness 0.29-21×10^4 Nm/rad. Zero-backlash strain-wave design with cup-shaped flexspline for robot joints, semiconductor handling and precision servo axes.
Sumitomo Drive Technologies' Fine Cyclo A-Series (FC type) is a precision cycloidal reducer kit for motion control: zero mechanical backlash and <1 arcmin lost motion across 6 sizes, ratios 29-179:1, nominal torque 149-3,900 Nm, acceleration torque 335-7,610 Nm, momentary peak up to 24,000 Nm, input speed to 6,150 rpm and torsional stiffness to 1,100 Nm/arcmin; grease-filled with keyway/clamp/spline input options for robot joints and machine-tool rotary tables.
Neugart (Germany) PLE is an economy spur-gear planetary gearbox in five frame sizes PLE040-PLE160 with cyclic torque 5-800 Nm, ratios i=3-512 and standard torsional backlash <6-<15 arcmin; radial force 200-5,000 N, axial force 240-11,000 N, single-stage efficiency 98%, 20,000 h service life, IP54, -25 to 90°C, lifetime grease lubrication and any mounting position - a cost-effective servo/stepper gearbox for packaging, conveying and general automation.
