RV-N compact component reducer; the customer integrates the input gear, housing, lubrication and robot-side structure
Motion & Actuation · Cycloidal precision reduction-gear component
RV-25N (ratio 81)
The RV-25N size and the ratio-81 selection column are kept together so ratings from another ratio or RV product form cannot silently migrate into this record. Rated torque is defined at the published rated output speed; the acceleration/deceleration and momentary maxima are separate allowable values with their own conditions.
Nabtesco RV-25N, ratio 81 · Also: RV-25N 81:1, RV-N size 25 ratio 81
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 |
|---|---|---|---|---|
| Model and selected ratiomodel_configuration | RV-25N, ratio 81 | Exact RV-N table column; the public table does not expose a complete option-suffixed purchase code. | M · Manufacturer claimed | Nabtesco Precision Equipment RV-N product specification ↗RV-25N ratio-81 selection column: ratings, rigidity, life, backlash, lost motion and inertia · Live product table observed 2026-08-19 Checked 2026-08-19 |
| Rated torquerated_torque | 245 N·m | Ratio-81 RV-25N column; defined together with the published rated output speed of 15 rpm. | M · Manufacturer claimed | Nabtesco Precision Equipment RV-N product specification ↗RV-25N ratio-81 selection column: ratings, rigidity, life, backlash, lost motion and inertia · Live product table observed 2026-08-19 Checked 2026-08-19 |
| Rated output speedrated_output_speed | 15 rpm | Manufacturer table rating; the speed condition attached to the rated torque. | M · Manufacturer claimed | Nabtesco Precision Equipment RV-N product specification ↗RV-25N ratio-81 selection column: ratings, rigidity, life, backlash, lost motion and inertia · Live product table observed 2026-08-19 Checked 2026-08-19 |
| Allowable acceleration/deceleration torqueacceleration_deceleration_torque | 612 N·m | Manufacturer table rating for start/stop events; the product guide labels the same value "Allowable starting/stopping torque". Not a continuous operating point. | M · Manufacturer claimed | Nabtesco Precision Equipment RV-N product specification ↗RV-25N ratio-81 selection column: ratings, rigidity, life, backlash, lost motion and inertia · Live product table observed 2026-08-19 Checked 2026-08-19 |
| Momentary maximum allowable torquemomentary_max_torque | 1,225 N·m | RV-N specification page of the official product guide; an emergency-event boundary, not an operating point. The live RV-N web table leaves this cell unpopulated for RV-25N. | M · Manufacturer claimed | Nabtesco Precision Reduction Gear RV Product Guide ↗RV-N specification page: RV-25N column with momentary maximum allowable torque, allowable moment and thrust · Official product guide PDF observed 2026-08-19 Checked 2026-08-19 |
| Rated liferated_life | 6,000 h | Manufacturer table value; load spectrum, mounting and lubrication must still match the selection conditions. | M · Manufacturer claimed | Nabtesco Precision Equipment RV-N product specification ↗RV-25N ratio-81 selection column: ratings, rigidity, life, backlash, lost motion and inertia · Live product table observed 2026-08-19 Checked 2026-08-19 |
| Backlashbacklash | less than 1 arc.min. | Exact-series public table. | M · Manufacturer claimed | Nabtesco Precision Equipment RV-N product specification ↗RV-25N ratio-81 selection column: ratings, rigidity, life, backlash, lost motion and inertia · Live product table observed 2026-08-19 Checked 2026-08-19 |
| 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-N product specification ↗RV-25N ratio-81 selection column: ratings, rigidity, life, backlash, lost motion and inertia · Live product table observed 2026-08-19 Checked 2026-08-19 |
| Torsional rigiditytorsional_rigidity | 61 N·m/arc.min. | RV-25N table value; the product guide qualifies it as a central value. | M · Manufacturer claimed | Nabtesco Precision Equipment RV-N product specification ↗RV-25N ratio-81 selection column: ratings, rigidity, life, backlash, lost motion and inertia · Live product table observed 2026-08-19 Checked 2026-08-19 |
| Moment rigiditymoment_rigidity | 530 N·m/arc.min. | RV-25N table value; a stiffness quantity, distinct from the allowable-moment load rating. | M · Manufacturer claimed | Nabtesco Precision Equipment RV-N product specification ↗RV-25N ratio-81 selection column: ratings, rigidity, life, backlash, lost motion and inertia · Live product table observed 2026-08-19 Checked 2026-08-19 |
| Allowable momentallowable_moment | 784 N·m | RV-N specification page of the official product guide; static load-rating boundary. | M · Manufacturer claimed | Nabtesco Precision Reduction Gear RV Product Guide ↗RV-N specification page: RV-25N column with momentary maximum allowable torque, allowable moment and thrust · Official product guide PDF observed 2026-08-19 Checked 2026-08-19 |
| Allowable thrust loadallowable_thrust | 2,610 N | RV-N specification page of the official product guide. | M · Manufacturer claimed | Nabtesco Precision Reduction Gear RV Product Guide ↗RV-N specification page: RV-25N column with momentary maximum allowable torque, allowable moment and thrust · Official product guide PDF observed 2026-08-19 Checked 2026-08-19 |
| Start-up efficiencystartup_efficiency | 80 % | Manufacturer table value; operating efficiency varies with load, speed and temperature. | M · Manufacturer claimed | Nabtesco Precision Equipment RV-N product specification ↗RV-25N ratio-81 selection column: ratings, rigidity, life, backlash, lost motion and inertia · Live product table observed 2026-08-19 Checked 2026-08-19 |
| Moment of inertia (input conversion)moment_of_inertia | 0.00000679 kg·m^2 | Ratio-81 RV-25N column; ratio-specific value. | M · Manufacturer claimed | Nabtesco Precision Equipment RV-N product specification ↗RV-25N ratio-81 selection column: ratings, rigidity, life, backlash, lost motion and inertia · Live product table observed 2026-08-19 Checked 2026-08-19 |
| Complete option-suffixed purchase code, mass 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 surfaces identify model and ratio but do not expose a complete regional order code, unit mass, revision, price, lead time or PCN/EOL state for RV-25N. | U · Unknown | Nabtesco Precision Equipment RV-N product specification ↗RV-25N ratio-81 selection column: ratings, rigidity, life, backlash, lost motion and inertia · Live product table 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 surfaces do not define one universal robot-joint motor, housing, lubrication, cooling, ambient and motion-cycle envelope for this record. | U · Unknown | Nabtesco Precision Reduction Gear RV Product Guide ↗RV-N specification page: RV-25N column with momentary maximum allowable torque, allowable moment and thrust · Official product guide PDF observed 2026-08-19 Checked 2026-08-19 |
| Independent assembled-joint 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, lubricated, loaded or life-tested this reducer in a robot joint. | U · Unknown | Nabtesco Precision Equipment RV-N product specification ↗RV-25N ratio-81 selection column: ratings, rigidity, life, backlash, lost motion and inertia · Live product table observed 2026-08-19 Checked 2026-08-19 |
Known limits
What this record does not prove.
- The ratio-81 record must not be generalized to another RV-25N ratio or another RV product form; only the inertia value is ratio-specific in the cited table, but that separation must be preserved.
- Rated torque at 15 rpm, allowable acceleration/deceleration torque and momentary maximum allowable torque are three separately conditioned values and must not be collapsed.
- No complete order suffix, published unit mass on the cited surfaces, current supply confirmation or RCI physical test exists.