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| Place of Origin | CHINA |
| Brand Name | SEW-EURODIRVE |
| Certification | CE/3C |
| Model Number | RF77 DRN90L4 |
Helical gearmotors
Make use of the advantages of the compact combination of powerful helical gear units and AC motors. Our helical gearmotors of the series R..DR.. set themselves apart with their finely stepped gear unit ratios and variety.
| R series helical gearmotors hard surface reducer ✪●✪ Product size&Technical data | |||||||
| Gear unit size | R17 | R27 | R37 | R47 | R57 | R67 | R77 |
| Motor Power(KW) | 0.09-0.75 | 0.12-3 | 0.12-3 | 0.12-5.5 | 0.12-7.5 | 0.12-7.5 | 0.18-11 |
| gear ratio range | 3.83-81.64 | 3.37-135.09 | 3.41-134.82 | 3.83-176.88 | 4.59-186.89 | 4.29-199.81 | 5.31-195.24 |
| Mamax Gear unit(Nm) | 85 | 130 | 200 | 300 | 450 | 600 | 820 |
| Gear unit size | RX57 | RX67 | RX77 | RX87 | RX97 | RX107 | |
| Motor Power(KW) | 0.12-7.5 | 0.12-7.5 | 0.12-15 | 0.25-30 | 0.25-37 | 2.2-45 | |
| gear ratio range | 1.3-5.5 | 1.4-6.07 | 1.42-8.00 | 1.39-8.65 | 1.42-8.23 | 1.44-6.63 | |
| Mamax Gear unit(Nm) | 69 | 134 | 215 | 405 | 595 | 830 | |
▶▶▶Features
RX series (single-stage)
•Highly efficient helical gear units in 6 sizes
•High output speed, up to 830 Nm
•Gear unit ratios up to i = 8.65
•Available in foot or flange-mounted design
R series (multi-stage)
•Optimum ratio between performance and space requirements thanks to 15 sizes
•Finely stepped gear unit ratios up to i = 289.74; or i = 27,001 for double gear units
•Available in foot or flange-mounted design
•Also available with reduced backlash
▶▶▶Production details
| Catalog designation | RF77 DRN90L4 |
| Product | Helical gearmotors R..DRN.. (IE3) |
| Product data | |
| Speed 50Hz [r/min] | 1461 / 22 |
| Total ratio [i] | 65,77 |
| Ma max [Nm] | 820 |
| Output torque 50Hz [Nm] | 645 |
| Service factor SEW-FB | 1,25 |
| Mounting position | M1 |
| ISO code | CLP 220 |
| Lubricant type | Miner.Oil |
| Lubricant volume [l] | 1,20 |
| Motor power [kW] | 1.5 |
| Motor frequency [Hz] | 50 |
| Cyclic duration factor S1-S10 | S1 |
| Voltage range [V] | 220-230 delta/380-400 star |
| Nominal current [A] | 6,00 / 3,45 |
| cos phi | 0,74 |
| Thermal cl.[°C]/Enclosure[IP] | 155(F) / 55 |
| International efficiency class | IE3 |
| Efficiency (100% Pn) [%] | 85,6 |
| Design specification | IEC 60034 |
▶▶▶Areas of application
RX series (single-stage)
◆Roller conveyors ◆Belt conveyors ◆Chain conveyors
R series (two-stage and three-stage)
◆Rotary tables ◆Pumps and fans ◆Waste water and sewage treatment plants
◆Fans ◆ Roller conveyors ◆ Belt conveyors
◆Chain conveyors ◆Corner transfer units
▶▶▶FAQ
Q:How to choose a gearbox which meets your requirement?
A:You can refer to our catalogue to choose the gearbox or we can help to choose when you provide
the technical information of required output torque, output speed and motor parameter etc.
▶▶▶ SEW reducer R series helical gear reducer
Gear transmission efficiency up to 98%, low vibration, low noise
Solid shaft, flange or footing mounting, can be used as the input stage part of the multi-stage reduction box
out speed (rpm): 0.05rpm - 1829rpm
Torque range(Nm/Power range(KW): 50Nm - 18,000 Nm/ 0.09KW - 160 kW
