RV-E component reducer with internal main bearing; the customer integrates the input, housing, lubrication and robot-side structure
Motion & Actuation · Cycloidal precision reduction-gear component
RV-20E (ratio 57)
The RV-20E size and ratio-57 row are kept together so ratings from another ratio or RV product form cannot silently migrate into this record. It remains a customer-integrated reducer component, not a complete robot joint or actuator.
Nabtesco RV-20E, ratio 57 · Also: RV-20E 57:1, RV-E size 20 ratio 57
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 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 |
|---|---|---|---|---|
| Model and selected ratiomodel_configuration | RV-20E, ratio 57 | Exact RV-E table row; the public table does not expose a complete option-suffixed purchase code. | M · Manufacturer claimed | Nabtesco Precision Equipment RV-E product specification ↗RV-20E ratio-57 selection row, product form, ratings, rigidity, life and integration boundary · Live product table observed 2026-08-13 Checked 2026-08-13 |
| Product formproduct_form | Component reducer with internal main bearing | Customer integrates the component into its own design. | M · Manufacturer claimed | Nabtesco Precision Equipment RV-E product specification ↗RV-20E ratio-57 selection row, product form, ratings, rigidity, life and integration boundary · Live product table observed 2026-08-13 Checked 2026-08-13 |
| Rated torquerated_torque | 167 N·m | Ratio-57 RV-20E row. | M · Manufacturer claimed | Nabtesco Precision Equipment RV-E product specification ↗RV-20E ratio-57 selection row, product form, ratings, rigidity, life and integration boundary · Live product table observed 2026-08-13 Checked 2026-08-13 |
| Momentary maximum allowable torquemomentary_max_torque | 412 N·m | Manufacturer table rating; not a continuous operating point. | M · Manufacturer claimed | Nabtesco Precision Equipment RV-E product specification ↗RV-20E ratio-57 selection row, product form, ratings, rigidity, life and integration boundary · Live product table observed 2026-08-13 Checked 2026-08-13 |
| Rated output speedrated_output_speed | 15 rpm | Manufacturer table rating. | M · Manufacturer claimed | Nabtesco Precision Equipment RV-E product specification ↗RV-20E ratio-57 selection row, product form, ratings, rigidity, life and integration boundary · Live product table observed 2026-08-13 Checked 2026-08-13 |
| Rated liferated_life | 6000 h | Manufacturer table value; load spectrum, mounting and lubrication must still match the selection conditions. | M · Manufacturer claimed | Nabtesco Precision Equipment RV-E product specification ↗RV-20E ratio-57 selection row, product form, ratings, rigidity, life and integration boundary · Live product table observed 2026-08-13 Checked 2026-08-13 |
| Backlashbacklash | Less than 1 arc.min | Exact-series public table. | M · Manufacturer claimed | Nabtesco Precision Equipment RV-E product specification ↗RV-20E ratio-57 selection row, product form, ratings, rigidity, life and integration boundary · Live product table observed 2026-08-13 Checked 2026-08-13 |
| Lost motionlost_motion | Less than 1 arc.min | Exact-series public table; not a measured assembled-joint result. | M · Manufacturer claimed | Nabtesco Precision Equipment RV-E product specification ↗RV-20E ratio-57 selection row, product form, ratings, rigidity, life and integration boundary · Live product table observed 2026-08-13 Checked 2026-08-13 |
| Torsional rigiditytorsional_rigidity | 49 N·m/arc.min | Ratio-57 RV-20E row. | M · Manufacturer claimed | Nabtesco Precision Equipment RV-E product specification ↗RV-20E ratio-57 selection row, product form, ratings, rigidity, life and integration boundary · Live product table observed 2026-08-13 Checked 2026-08-13 |
| Massmass | 4.7 kg | Manufacturer table value. | M · Manufacturer claimed | Nabtesco Precision Equipment RV-E product specification ↗RV-20E ratio-57 selection row, product form, ratings, rigidity, life and integration boundary · Live product table observed 2026-08-13 Checked 2026-08-13 |
| Complete option-suffixed purchase code and current availabilitycomplete_purchase_suffix | Not published in cited public evidence | RCI checked the cited official public evidence on the verification date.The cited public table identifies model and ratio but does not expose a complete regional order code, revision, price, lead time or PCN/EOL state. | U · Unknown | Nabtesco Precision Equipment RV-E product specification ↗RV-20E ratio-57 selection row, product form, ratings, rigidity, life and integration boundary · Live product table observed 2026-08-13 Checked 2026-08-13 |
| Independent assembled-joint validationindependent_joint_test | Not published in cited public evidence | RCI checked the cited official public evidence on the verification date.RCI has not received, instrumented, lubricated, loaded or life-tested this reducer in a robot joint. | U · Unknown | Nabtesco Precision Equipment RV-E product specification ↗RV-20E ratio-57 selection row, product form, ratings, rigidity, life and integration boundary · Live product table observed 2026-08-13 Checked 2026-08-13 |
Known limits
What this record does not prove.
- The ratio-57 ratings must not be generalized to another RV-20E ratio or another RV product form.
- Backlash and lost-motion table values are manufacturer specifications, not RCI joint measurements.
- No complete order suffix, current supply confirmation or RCI physical test exists.