Standard cup-shaped flexspline strain-wave gear composed of flexspline, rigid circular spline, wave generator and bearing; LCS-I keyed input and LCS-II Oldham-coupling input variants
Motion & Actuation · Strain-wave gear unit
LCS series, size 20, ratio 100
The official LCS page publishes a series-size-ratio parameter grid without one orderable purchase code, so this record freezes the grid coordinates size 20, ratio 100. All values are Leaderdrive catalog-table claims; substitution for or interchangeability with any other manufacturer’s strain-wave product is not established by this record.
Leaderdrive LCS-20 ratio 100 strain wave gear · Also: LCS-20-100, LCS size 20 ratio 100 (input types LCS-I / LCS-II)
What this record can support today.
Coverage is computed from published, non-unknown fields. It measures the record—not product quality—and makes missing procurement evidence explicit.
Engineering field coverage55%
6 of 11 selected fields published
- Official product sourcepublished
- Lifecycle statepublished
- Mechanical dimensions / mass / mountingmissing
- Environmental operating limitsmissing
- Continuous or rated outputpublished
- Peak / momentary outputpublished
- Speed boundarypublished
- Transmission ratio / errorpublished
- Electrical input / consumptionmissing
- Control and communication interfacemissing
- Position / torque feedbackmissing
Procurement field coverage15%
2 of 13 selected fields published
- Official product / sales routepublished
- Lifecycle statepublished
- Exact orderable SKU / part numbermissing
- Price with region, currency and quantitymissing
- Lead time with check datemissing
- Commercial availability / stock statemissing
- Minimum order quantitymissing
- Authorized distributor / sales channelmissing
- CAD / STEP / interface drawingmissing
- Certification with identifiermissing
- MTBF / failure / reliability datamissing
- Warranty termsmissing
- PCN / EOL / replacement noticemissing
Coverage measures whether a selected public field is present with non-U evidence. It is not a product score, compatibility result, certification, availability confirmation or procurement recommendation. Download the complete readiness coverage JSON →
Reported values, conditions attached.
Evidence state describes the claim—not the prestige of the company or document.
| Claim | Reported value | Condition / boundary | State | Source |
|---|---|---|---|---|
| Series grid coordinatesseries_grid_configuration | LCS series, size 20, ratio 100; input variants LCS-I (flat key) and LCS-II (Oldham coupling) | The cited page defines a size-and-ratio parameter grid and two input-connection variants; it does not publish one complete orderable code. | M · Manufacturer claimed | Leaderdrive LCS(G) Standard Cup-shaped Strain Wave Gear ↗LCS Series Technical Parameter tables: size-20 ratio-100 rows for ratings, backlash, hysteresis loss, stiffness and accuracy · Live official product page observed 2026-08-19 Checked 2026-08-19 |
| Rated torquerated_torque | 40 N·m | Size-20 ratio-100 row; the same table carries a "Rated Input Speed" column reading 3,500 r/min for size 20. | M · Manufacturer claimed | Leaderdrive LCS(G) Standard Cup-shaped Strain Wave Gear ↗LCS Series Technical Parameter tables: size-20 ratio-100 rows for ratings, backlash, hysteresis loss, stiffness and accuracy · Live official product page observed 2026-08-19 Checked 2026-08-19 |
| Rated input speedrated_input_speed | 3,500 r/min | Size-20 table value published alongside the rated-torque column. | M · Manufacturer claimed | Leaderdrive LCS(G) Standard Cup-shaped Strain Wave Gear ↗LCS Series Technical Parameter tables: size-20 ratio-100 rows for ratings, backlash, hysteresis loss, stiffness and accuracy · Live official product page observed 2026-08-19 Checked 2026-08-19 |
| Allowable peak torque at start/stopstart_stop_peak_torque | 82 N·m | Size-20 ratio-100 row; a start/stop event boundary, not a continuous operating point. | M · Manufacturer claimed | Leaderdrive LCS(G) Standard Cup-shaped Strain Wave Gear ↗LCS Series Technical Parameter tables: size-20 ratio-100 rows for ratings, backlash, hysteresis loss, stiffness and accuracy · Live official product page observed 2026-08-19 Checked 2026-08-19 |
| Allowable maximum value of average load torquemax_average_load_torque | 49 N·m | Size-20 ratio-100 row; a load-spectrum boundary. | M · Manufacturer claimed | Leaderdrive LCS(G) Standard Cup-shaped Strain Wave Gear ↗LCS Series Technical Parameter tables: size-20 ratio-100 rows for ratings, backlash, hysteresis loss, stiffness and accuracy · Live official product page observed 2026-08-19 Checked 2026-08-19 |
| Maximum allowable peak torquemax_peak_torque | 147 N·m | Size-20 ratio-100 row; an emergency-event boundary with its own occurrence conditions. | M · Manufacturer claimed | Leaderdrive LCS(G) Standard Cup-shaped Strain Wave Gear ↗LCS Series Technical Parameter tables: size-20 ratio-100 rows for ratings, backlash, hysteresis loss, stiffness and accuracy · Live official product page observed 2026-08-19 Checked 2026-08-19 |
| Maximum allowable input speedmax_input_speed | 6,500 r/min | Size-20 table value. | M · Manufacturer claimed | Leaderdrive LCS(G) Standard Cup-shaped Strain Wave Gear ↗LCS Series Technical Parameter tables: size-20 ratio-100 rows for ratings, backlash, hysteresis loss, stiffness and accuracy · Live official product page observed 2026-08-19 Checked 2026-08-19 |
| Maximum backlashmax_backlash | ≤10 arcsec | Size-20 table value labeled "Max. Backlash"; a component specification, not a mounted-joint measurement. | M · Manufacturer claimed | Leaderdrive LCS(G) Standard Cup-shaped Strain Wave Gear ↗LCS Series Technical Parameter tables: size-20 ratio-100 rows for ratings, backlash, hysteresis loss, stiffness and accuracy · Live official product page observed 2026-08-19 Checked 2026-08-19 |
| Hysteresis losshysteresis_loss | 60 arcsec | Size-20 ratio-100 row of the second LCS parameter table; a quantity distinct from backlash. | M · Manufacturer claimed | Leaderdrive LCS(G) Standard Cup-shaped Strain Wave Gear ↗LCS Series Technical Parameter tables: size-20 ratio-100 rows for ratings, backlash, hysteresis loss, stiffness and accuracy · Live official product page observed 2026-08-19 Checked 2026-08-19 |
| Backdriving torquebackdriving_torque | 5.1 N·m | Size-20 ratio-100 row. | M · Manufacturer claimed | Leaderdrive LCS(G) Standard Cup-shaped Strain Wave Gear ↗LCS Series Technical Parameter tables: size-20 ratio-100 rows for ratings, backlash, hysteresis loss, stiffness and accuracy · Live official product page observed 2026-08-19 Checked 2026-08-19 |
| Ratcheting torqueratcheting_torque | 260 N·m | Size-20 ratio-100 row; exceeding it can cause tooth-jump damage per strain-wave engineering practice. | M · Manufacturer claimed | Leaderdrive LCS(G) Standard Cup-shaped Strain Wave Gear ↗LCS Series Technical Parameter tables: size-20 ratio-100 rows for ratings, backlash, hysteresis loss, stiffness and accuracy · Live official product page observed 2026-08-19 Checked 2026-08-19 |
| Torsional rigidity K1 / K2 / K3torsional_stiffness | 1.6 / 2.5 / 2.9 ×10^4 N·m/rad | Piecewise size-20 ratio-100 table values. | M · Manufacturer claimed | Leaderdrive LCS(G) Standard Cup-shaped Strain Wave Gear ↗LCS Series Technical Parameter tables: size-20 ratio-100 rows for ratings, backlash, hysteresis loss, stiffness and accuracy · Live official product page observed 2026-08-19 Checked 2026-08-19 |
| Angle transmission accuracyangle_transmission_accuracy | 60 arcsec | Size-20 ratio-100 row; a transmission-error specification distinct from backlash and hysteresis loss. | M · Manufacturer claimed | Leaderdrive LCS(G) Standard Cup-shaped Strain Wave Gear ↗LCS Series Technical Parameter tables: size-20 ratio-100 rows for ratings, backlash, hysteresis loss, stiffness and accuracy · Live official product page observed 2026-08-19 Checked 2026-08-19 |
| Buckling torquebuckling_torque | 560 N·m | Size-20 table value; a flexspline destruction boundary, not an operating rating. | M · Manufacturer claimed | Leaderdrive LCS(G) Standard Cup-shaped Strain Wave Gear ↗LCS Series Technical Parameter tables: size-20 ratio-100 rows for ratings, backlash, hysteresis loss, stiffness and accuracy · Live official product page observed 2026-08-19 Checked 2026-08-19 |
| Robot-joint thermal duty enveloperobot_joint_thermal_envelope | Not published in cited public evidence | RCI checked the cited official public evidence on the verification date.The cited page does not define one universal robot-joint motor, housing, lubrication, cooling, ambient and motion-cycle envelope for this record. | U · Unknown | Leaderdrive LCS(G) Standard Cup-shaped Strain Wave Gear ↗LCS Series Technical Parameter tables: size-20 ratio-100 rows for ratings, backlash, hysteresis loss, stiffness and accuracy · Live official product page observed 2026-08-19 Checked 2026-08-19 |
| Independent exact-gear robot validationindependent_robot_validation | Not published in cited public evidence | RCI checked the cited official public evidence on the verification date.RCI has not received, instrumented, endurance-tested or teardown-inspected this strain wave gear in a robot joint. | U · Unknown | Leaderdrive LCS(G) Standard Cup-shaped Strain Wave Gear ↗LCS Series Technical Parameter tables: size-20 ratio-100 rows for ratings, backlash, hysteresis loss, stiffness and accuracy · Live official product page observed 2026-08-19 Checked 2026-08-19 |
Known limits
What this record does not prove.
- The cited official page publishes a series-size-ratio grid without one orderable purchase code; an exact order code, mass and lubrication specification must be fixed with Leaderdrive before procurement.
- Substitution for or interchangeability with Harmonic Drive or any other manufacturer’s strain-wave product is not established by this record.
- Start/stop, average-load, maximum-peak, ratcheting and buckling torques are separately conditioned boundaries and must not be collapsed.
- No RCI physical specimen, joint integration, life test or teardown evidence exists.