Description
EP Reducer-Dedicated Motor
EP-REDUCER-90L-4
EP-REDUCER-90L-4: 1.5 kW, 1390 r/min. Motor configurations intended for direct integration with industrial speed reducers; configured with matched transmission components when required.

Model Duty
At the documented operating point, EP-REDUCER-90L-4 is considered as a direct mechanical integration with a reducer or gearbox selection with reference speed 1390 r/min. The useful engineering question is how that operating point behaves in conveyors, mixers, feeders and machinery driven through a speed reducer. Record the driven-machine load and output speed first, then check efficiency 78.5% against the actual supply and duty. A motor row becomes meaningful only when those values are attached to the machine it will run.
The mechanical review should include helical, bevel, worm or planetary gearboxes, couplings, shafts, sprockets and chains. In this model size, do not assume that matching power guarantees a matching shaft or flange. Confirm the drawing, bore, key, shaft engagement and guard space rather than relying on a family name alone.
Application Match
On a new machine, EP-REDUCER-90L-4 is considered as a direct mechanical integration with a reducer or gearbox selection with rated current 3.7 A. The useful engineering question is how that operating point behaves in conveyors, mixers, feeders and machinery driven through a speed reducer. Record the driven-machine load and output speed first, then check noise 61 dB(A) against the actual supply and duty. A motor row becomes meaningful only when those values are attached to the machine it will run.
For purchasing, state whether EP-REDUCER-90L-4 is a new OEM selection, an interchange or part of an efficiency retrofit. That context decides which dimensions are fixed and which can change. Keep helical, bevel, worm or planetary gearboxes, couplings, shafts, sprockets and chains inside the same scope before the purchase specification is frozen.
Transmission Choice
In a replacement project, EP-REDUCER-90L-4 is considered as a direct mechanical integration with a reducer or gearbox selection with efficiency 78.5%. The useful engineering question is how that operating point behaves in conveyors, mixers, feeders and machinery driven through a speed reducer. Record the driven-machine load and output speed first, then check vibration 1.8 mm/s against the actual supply and duty. A motor row becomes meaningful only when those values are attached to the machine it will run.
If the machine speed is created through reduction, calculate the complete ratio from motor shaft to driven shaft. A gearbox, sprocket or pulley can change both speed and shaft loading. The drawing should show where helical, bevel, worm or planetary gearboxes, couplings, shafts, sprockets and chains connect to EP-REDUCER-90L-4 before the purchase specification is frozen. The reducer-dedicated interface must be checked against the final gearbox drawing; the public product image is representative and does not establish the delivered flange dimensions.
Electrical Behavior
When the drive is assembled, EP-REDUCER-90L-4 is considered as a direct mechanical integration with a reducer or gearbox selection with noise 61 dB(A). The useful engineering question is how that operating point behaves in conveyors, mixers, feeders and machinery driven through a speed reducer. Record the driven-machine load and output speed first, then check rated output 1.5 kW against the actual supply and duty. A motor row becomes meaningful only when those values are attached to the machine it will run.
Rated current 3.7 a is a useful catalog reference, but commissioning should create a site baseline under a known load. Note current, temperature and visible vibration at the same time. If a gearbox or chain stage is part of the drive, record its condition too before the purchase specification is frozen.
Physical Integration
During technical review, EP-REDUCER-90L-4 is considered as a direct mechanical integration with a reducer or gearbox selection with vibration 1.8 mm/s. The useful engineering question is how that operating point behaves in conveyors, mixers, feeders and machinery driven through a speed reducer. Record the driven-machine load and output speed first, then check reference speed 1390 r/min against the actual supply and duty. A motor row becomes meaningful only when those values are attached to the machine it will run.
Destination country belongs in the technical record. A motor that is mechanically suitable may still sit inside a different efficiency, marking or conformity scope in the United States, European Union, Japan, Brazil, Mexico or another market. Separate that regulatory check from the machine calculation before the purchase specification is frozen. The reducer-dedicated interface must be checked against the final gearbox drawing; the public product image is representative and does not establish the delivered flange dimensions.
Destination Review
For an OEM buyer, EP-REDUCER-90L-4 is considered as a direct mechanical integration with a reducer or gearbox selection with rated output 1.5 kW. The useful engineering question is how that operating point behaves in conveyors, mixers, feeders and machinery driven through a speed reducer. Record the driven-machine load and output speed first, then check rated current 3.7 A against the actual supply and duty. A motor row becomes meaningful only when those values are attached to the machine it will run.
The mechanical review should include helical, bevel, worm or planetary gearboxes, couplings, shafts, sprockets and chains. In this model size, do not assume that matching power guarantees a matching shaft or flange. Confirm the drawing, bore, key, shaft engagement and guard space before the purchase specification is frozen.
Startup Checks
At commissioning, EP-REDUCER-90L-4 is considered as a direct mechanical integration with a reducer or gearbox selection with reference speed 1390 r/min. The useful engineering question is how that operating point behaves in conveyors, mixers, feeders and machinery driven through a speed reducer. Record the driven-machine load and output speed first, then check efficiency 78.5% against the actual supply and duty. A motor row becomes meaningful only when those values are attached to the machine it will run.
For purchasing, state whether EP-REDUCER-90L-4 is a new OEM selection, an interchange or part of an efficiency retrofit. That context decides which dimensions are fixed and which can change. Keep helical, bevel, worm or planetary gearboxes, couplings, shafts, sprockets and chains inside the same scope rather than relying on a family name alone.
Service Clues
Under steady production duty, EP-REDUCER-90L-4 is considered as a direct mechanical integration with a reducer or gearbox selection with rated current 3.7 A. The useful engineering question is how that operating point behaves in conveyors, mixers, feeders and machinery driven through a speed reducer. Record the driven-machine load and output speed first, then check noise 61 dB(A) against the actual supply and duty. A motor row becomes meaningful only when those values are attached to the machine it will run.
If the machine speed is created through reduction, calculate the complete ratio from motor shaft to driven shaft. A gearbox, sprocket or pulley can change both speed and shaft loading. The drawing should show where helical, bevel, worm or planetary gearboxes, couplings, shafts, sprockets and chains connect to EP-REDUCER-90L-4 rather than relying on a family name alone.
Retrofit Notes
Before the drawing is released, EP-REDUCER-90L-4 is considered as a direct mechanical integration with a reducer or gearbox selection with efficiency 78.5%. The useful engineering question is how that operating point behaves in conveyors, mixers, feeders and machinery driven through a speed reducer. Record the driven-machine load and output speed first, then check vibration 1.8 mm/s against the actual supply and duty. A motor row becomes meaningful only when those values are attached to the machine it will run.
Reference speed 1390 r/min is a useful catalog reference, but commissioning should create a site baseline under a known load. Note current, temperature and visible vibration at the same time. If a gearbox or chain stage is part of the drive, record its condition too rather than relying on a family name alone.
RFQ Detail
When a gearbox is added, EP-REDUCER-90L-4 is considered as a direct mechanical integration with a reducer or gearbox selection with noise 61 dB(A). The useful engineering question is how that operating point behaves in conveyors, mixers, feeders and machinery driven through a speed reducer. Record the driven-machine load and output speed first, then check rated output 1.5 kW against the actual supply and duty. A motor row becomes meaningful only when those values are attached to the machine it will run.
Destination country belongs in the technical record. A motor that is mechanically suitable may still sit inside a different efficiency, marking or conformity scope in the United States, European Union, Japan, Brazil, Mexico or another market. Separate that regulatory check from the machine calculation rather than relying on a family name alone.
Technical Parameters
The table below carries the documented data for this selected variant. Fields not documented for the row are not filled with approximate values.
| Parameter | Value |
|---|---|
| Model | EP-REDUCER-90L-4 |
| Series | EP Reducer-Dedicated Motors |
| Rated Output | 1.5 kW |
| Rated / Reference Speed | 1390 r/min |
| Rated Current | 3.7 A |
| Efficiency | 78.5% |
| Power Factor | 0.79 |
| Vibration | 1.8 mm/s |
| Noise | 61 dB(A) |
| Locked-Rotor Current | 6.0× |
| Locked-Rotor Torque | 2.3× |
| Maximum Torque | 2.3× |
| Additional Catalog Detail | 90L frame; reducer-dedicated flange configuration selected with final gearbox drawing |
Frequently Asked Questions
What is the rated output of EP-REDUCER-90L-4?
1.5 kW
What speed is listed for EP-REDUCER-90L-4?
1390 r/min
Which transmission parts can be reviewed with it?
Typical paired components include helical, bevel, worm or planetary gearboxes, couplings, shafts, sprockets and chains. Final compatibility is checked from the machine drawing and duty.
Can this motor be used in any country?
No universal claim is made. Destination efficiency, marking and conformity requirements must be checked for the exact configuration.
What should I send for a replacement?
Send nameplate data plus shaft diameter and extension, key, foot or flange pattern, frame or shaft height, envelope and the driven connection.
What commissioning data is useful?
Record current, temperature, noise and vibration under a known load. The selected row lists 3.7 A, 61 dB(A) and 1.8 mm/s where documented, providing reference values for comparison rather than replacing a site baseline.
Quote EP-REDUCER-90L-4
Send the driven-machine duty, required output speed or gearbox ratio, supply, mounting, environment and destination country. Include any gearbox, coupling, chain, sprocket or pulley in the scope so the interfaces can be reviewed together.

