real case to choose helical gearbox to repalce SEW brand

Original Unit Info (from nameplate) Sent by one customer in Russia

Brand: SEW-EURODRIVE Model: RF87 DRN90L4/DH

Power: 1.5kW, S1 continuous duty

Supply: 3-phase, 220-230V Delta / 380-400V Star

Motor speed: 1461rpm@50Hz; 1767rpm@60Hz

Output torque: 710Nm(50Hz) / 590Nm(60Hz)

Output speed: 20rpm@50Hz; 24rpm@60Hz

Protection: IP56

Insulation class: F (155°C)

Lubricant: CLP220 mineral oil, oil volume 6.8L

Weight: 95.153kg

Mounting: IM M4 (flange mounting)

Application: Inverter duty VPWM

Our Replacement Proposal

We provide a fully interchangeable analogue gearbox + motor assembly to substitute the SEW RF87 DRN90L4/DH unit.

our model is as below: RF87-Y1.5KW/4P-NA20-M4-D350

1. Mechanical interchangeability: Same mounting dimension (IM M4 flange), same shaft size & position, can directly bolt on to your existing equipment without modification.
2. Performance match: Rated power 1.5kW, same reduction ratio, matched output torque 710Nm, output speed 20rpm@50Hz. IP56 protection, Class F insulation, suitable for VPWM inverter drive, same continuous S1 duty cycle.
3. Lubrication & environment: Pre-filled with CLP220 mineral oil, working ambient temperature -20 ~ +40°C, same as original SEW specification.
4. Material & coating: HT250 Cast iron housing with anti-corrosion painting. If your site is coastal/high salt spray environment, we can upgrade the surface treatment to anti-salt-spray coating for extra corrosion resistance with C5-M standard (over 320Microns thickness coating)

Value Note

Our replacement unit keeps all interface and performance parameters consistent with your original SEW RF87 DRN90L4/DH. It can directly replace the existing unit, no redesign or adaption work needed. We also offer spare parts and aftersales technical support for this model.