Housed SHG-series high-torque strain-wave gear unit with hollow shaft, integrated output bearing, size 20 and 100:1 nominal ratio
Motion & Actuation · Strain-wave gear unit
SHG-20-100-2UH
An exact size-and-ratio gear-unit record frozen from the official exact-model page. Rated, average, repeated-peak and momentary-peak torques are four separately conditioned catalog values and are transcribed separately; none of them is an RCI robot-joint duty-cycle, thermal or life result.
Harmonic Drive SHG-20-100-2UH · Also: SHG-2UH size 20 ratio 100, SHG-20-100-2UH hollow shaft gear unit
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 coverage64%
7 of 11 selected fields published
- Official product sourcepublished
- Lifecycle statepublished
- Mechanical dimensions / mass / mountingpublished
- 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 coverage23%
3 of 13 selected fields published
- Official product / sales routepublished
- Lifecycle statepublished
- Exact orderable SKU / part numberpublished
- 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 |
|---|---|---|---|---|
| Exact unit order codeorder_code | SHG-20-100-2UH | Series SHG, size 20, ratio 100, unit type 2UH; option suffixes (for example coatings) are separate orderable variants. | M · Manufacturer claimed | Harmonic Drive SHG-20-100-2UH Hollow Shaft Gear Unit ↗Exact-model performance, torsional-stiffness and output-bearing tables for SHG-20-100-2UH · Live official exact-model page observed 2026-08-19 Checked 2026-08-19 |
| Reduction ratioratio | 100:1 | Exact order-code segment and table row; size 20 frame. | M · Manufacturer claimed | Harmonic Drive SHG-20-100-2UH Hollow Shaft Gear Unit ↗Exact-model performance, torsional-stiffness and output-bearing tables for SHG-20-100-2UH · Live official exact-model page observed 2026-08-19 Checked 2026-08-19 |
| Rated torquerated_torque | 52 N·m | Manufacturer L10-rated value for the exact table row; the catalog rating conditions, including the defined rated input speed, apply. | M · Manufacturer claimed | Harmonic Drive SHG-20-100-2UH Hollow Shaft Gear Unit ↗Exact-model performance, torsional-stiffness and output-bearing tables for SHG-20-100-2UH · Live official exact-model page observed 2026-08-19 Checked 2026-08-19 |
| Limit for average torquelimit_average_torque | 64 N·m | Manufacturer rating-table value; a load-spectrum boundary, not a continuous operating point. | M · Manufacturer claimed | Harmonic Drive SHG-20-100-2UH Hollow Shaft Gear Unit ↗Exact-model performance, torsional-stiffness and output-bearing tables for SHG-20-100-2UH · Live official exact-model page observed 2026-08-19 Checked 2026-08-19 |
| Limit for repeated peak torquerepeated_peak_torque | 107 N·m | Manufacturer rating-table value; not a continuous operating point. | M · Manufacturer claimed | Harmonic Drive SHG-20-100-2UH Hollow Shaft Gear Unit ↗Exact-model performance, torsional-stiffness and output-bearing tables for SHG-20-100-2UH · Live official exact-model page observed 2026-08-19 Checked 2026-08-19 |
| Limit for momentary peak torquemomentary_peak_torque | 191 N·m | Manufacturer rating-table value; duration and occurrence limits must be checked in catalog engineering guidance. | M · Manufacturer claimed | Harmonic Drive SHG-20-100-2UH Hollow Shaft Gear Unit ↗Exact-model performance, torsional-stiffness and output-bearing tables for SHG-20-100-2UH · Live official exact-model page observed 2026-08-19 Checked 2026-08-19 |
| Starting torquestarting_torque | 32 Ncm | Manufacturer table value at the input; lubrication and temperature conditions apply. | M · Manufacturer claimed | Harmonic Drive SHG-20-100-2UH Hollow Shaft Gear Unit ↗Exact-model performance, torsional-stiffness and output-bearing tables for SHG-20-100-2UH · Live official exact-model page observed 2026-08-19 Checked 2026-08-19 |
| Backdriving torquebackdriving_torque | 38 N·m | Manufacturer table value; integration, lubrication and temperature can affect system behavior. | M · Manufacturer claimed | Harmonic Drive SHG-20-100-2UH Hollow Shaft Gear Unit ↗Exact-model performance, torsional-stiffness and output-bearing tables for SHG-20-100-2UH · Live official exact-model page observed 2026-08-19 Checked 2026-08-19 |
| Average input speedaverage_input_speed | 3,500 rpm | Published "Ave. Input Speed" table value; not a guaranteed continuous operating point at any load. | M · Manufacturer claimed | Harmonic Drive SHG-20-100-2UH Hollow Shaft Gear Unit ↗Exact-model performance, torsional-stiffness and output-bearing tables for SHG-20-100-2UH · Live official exact-model page observed 2026-08-19 Checked 2026-08-19 |
| Standard accuracystandard_accuracy | 1 arc min | Published standard-accuracy table value, not mounted-system accuracy. | M · Manufacturer claimed | Harmonic Drive SHG-20-100-2UH Hollow Shaft Gear Unit ↗Exact-model performance, torsional-stiffness and output-bearing tables for SHG-20-100-2UH · Live official exact-model page observed 2026-08-19 Checked 2026-08-19 |
| Massmass | 1.38 kg | Exact table row. | M · Manufacturer claimed | Harmonic Drive SHG-20-100-2UH Hollow Shaft Gear Unit ↗Exact-model performance, torsional-stiffness and output-bearing tables for SHG-20-100-2UH · Live official exact-model page observed 2026-08-19 Checked 2026-08-19 |
| Torsional stiffness K1 / K2 / K3torsional_stiffness | 1.6 / 2.5 / 2.9 ×10^4 N·m/rad | Piecewise manufacturer table values for the exact model (K1 below T1 = 7 N·m, K2 below T2 = 25 N·m). | M · Manufacturer claimed | Harmonic Drive SHG-20-100-2UH Hollow Shaft Gear Unit ↗Exact-model performance, torsional-stiffness and output-bearing tables for SHG-20-100-2UH · Live official exact-model page observed 2026-08-19 Checked 2026-08-19 |
| Output-bearing moment stiffness Kmoutput_moment_stiffness | 25.2 ×10^4 N·m/rad | Exact table row. | M · Manufacturer claimed | Harmonic Drive SHG-20-100-2UH Hollow Shaft Gear Unit ↗Exact-model performance, torsional-stiffness and output-bearing tables for SHG-20-100-2UH · Live official exact-model page observed 2026-08-19 Checked 2026-08-19 |
| Allowable moment load Mcallowable_moment_load | 187 N·m | Output-bearing rating; combined-load checks per catalog method still apply. | M · Manufacturer claimed | Harmonic Drive SHG-20-100-2UH Hollow Shaft Gear Unit ↗Exact-model performance, torsional-stiffness and output-bearing tables for SHG-20-100-2UH · Live official exact-model 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 catalog does not define one universal robot-joint motor, housing, lubrication, cooling, ambient and motion-cycle envelope for this record. | U · Unknown | Harmonic Drive SHG/SHF Gear Units Catalog ↗SHG-2UH series engineering, rating-definition and application boundaries · Official series catalog linked from the exact-model page, observed 2026-08-19 Checked 2026-08-19 |
| Independent exact-unit 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 gear unit in a robot joint. | U · Unknown | Harmonic Drive SHG/SHF Gear Units Catalog ↗SHG-2UH series engineering, rating-definition and application boundaries · Official series catalog linked from the exact-model page, observed 2026-08-19 Checked 2026-08-19 |
Known limits
What this record does not prove.
- Rated, average, repeated-peak and momentary-peak torque are separately conditioned catalog values and must not be collapsed into one output figure.
- Gear-unit ratings do not establish a complete motor, encoder, brake, housing, lubrication or thermal design.
- No RCI physical specimen, joint integration, life test or teardown evidence exists.