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VRSF-20C-400-T3

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NIDEC VRSF-20C-400-T3 is a direct-type VRSF planetary reducer with a 20:1 ratio, C frame and motor-specific Type 3 adapter.
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Technical specifications for VRSF-20C-400-T3

  • Manufacturer:
    NIDEC
  • Part Number:
    VRSF-20C-400-T3
  • Product Family:
    NIDEC
  • Product Type:
    VRSF Coaxial Planetary Gear Reducer
  • Stock:
    1
  • Reduction ratio:
    20:1
  • Backlash:
    15 arc-min
  • Allowable output torque:
    21.1 N·m
  • Instantaneous maximum output torque:
    63.3 N·m
  • Nominal input speed:
    3000 rpm
  • Maximum input speed:
    5000 rpm
  • Allowable radial load:
    1570 N
  • Allowable axial load:
    785 N
  • Moment of inertia:
    0.294 kg·cm²
  • Lubrication:
    Grease filled
  • Weight:
    2.1 kg
  • Estimated shipping dimensions:
    15x7.8x7.8cm
  • Tariff Code:
    Please confirm the destination before shipping
  • Country of origin:
    Japan
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Performance & Efficiency Installation Operating Environment Applications

Features:

  • 20:1 planetary reduction: Pairs the documented speed ratio with a coaxial output path.
  • Defined load capability: Publishes torque, radial-load, axial-load, and speed limits.
  • Motor-specific direct mounting: Uses the Type 3 adapter selected for the 400 motor class.
The complete code fixes ratio, frame, motor class, and adapter type as one reducer configuration.

Mechanical fit alone does not establish acceptable torque, speed, backlash, or shaft loading.

Legacy planning should preserve the motor and driven-machine geometry before the installed reducer is removed.

Apter Power supports NIDEC VRSF-20C-400-T3 quotations, technical documents, and servo-reducer application review.
NIDEC VRSF-20C-400-T3 VRSF Coaxial Planetary Gear Reducer Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Torque envelope: Keep continuous and transient demand inside the documented output limits.
  • Input speed: Evaluate normal and peak motor speed against the 3000 and 5000 rpm values.
  • Backlash: Account for 15 arc-min when the motion profile depends on reversal accuracy.
  • Load capacity: Check radial and axial reactions at the actual output-shaft load point.
  • Motor interface: Confirm the 400 motor class and Type 3 mounting details before assembly.
  • Alignment: Keep motor and reducer pilots clean and concentric during installation.
  • Output coupling: Avoid hammering, forced fits, or unsupported overhung loading on the shaft.
  • Fasteners: Use the documented tightening sequence and recheck the mounted assembly.
  • Ambient temperature: Plan operation within the documented 0 to 40°C ambient range.
  • Surface temperature: Investigate loading or lubrication conditions if the housing approaches 90°C.
  • Lubrication: Protect the sealed grease-filled assembly from leakage and contamination.
  • Ingress boundary: Treat the standard IP40-equivalent construction as indoor protected equipment.
  • Servo axis reduction: Increases available torque while reducing motor speed by 20:1.
  • Positioning equipment: Supports controlled motion where the published backlash is acceptable.
  • Machine retrofits: Maintains a documented VRSF motor and output interface in legacy equipment.
  • Automation mechanisms: Drives indexed, conveying, handling, or adjustment axes within rated loads.
Description
Converting servo-motor speed into higher output torque, VRSF-20C-400-T3 is a coaxial planetary reducer from the discontinued VRSF series. The official selection result identifies ratio 20, C frame, 400 motor class, and T3 as the Type 3 motor-specific mounting configuration.

Rated output torque for VRSF-20C-400-T3 is 21.1 N·m, with 63.3 N·m instantaneous maximum output torque and 15 arc-minute backlash. Grease lubrication is filled for service, while alignment, fastener tightening, load direction, and the connected motor specification remain installation controls.

NIDEC ended VRSF sales in September 2016, so VRSF-20C-400-T3 belongs in a legacy service plan rather than an active-series assumption. Apter Power can support quotations, technical documents, motor-adapter review, and reducer application planning for the installed assembly.
Alternative Names
VRSF-20C-400-T3 VRSF-20C-400-TYPE3 VRSF 20C 400 T3 VRSF20C400T3 NIDEC VRSF-20C-400-T3 Nidec-Shimpo VRSF-20C-400-T3 VRSF-20C-400 VRSF 20 C 400 TYPE3
Technical notes
For VRSF-20C-400-T3, verify the 20:1 ratio, C frame, 400 motor interface, Type 3 adapter, output-shaft load, alignment, fastener torque, and operating temperature together. The VRSF series is discontinued. Do not treat a physically similar reducer as equivalent without confirming motor fit, shaft geometry, ratio, backlash, and permissible loads.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What should maintenance do if VRSF-20C-400-T3 develops abnormal noise or an oil leak?
NIDEC instructs users to stop operation and contact the manufacturer or service representative when abnormal noise or oil leakage is found. Turn off the drive, confirm that the motor has stopped, and allow the reducer to cool before inspection.
How should VRSF-20C-400-T3 be checked during its first machine run?
Confirm the output-shaft direction first, then apply load gradually while keeping input speed and load within the documented limits. Stop immediately if temperature rises suddenly, loud noise appears, or rotation becomes unstable.