Helical gear unit versions
| Single-stage | Size | ||||||
| 57 | 67 | 77 | 87 | 97 | 107 | ||
| RX.. | Foot-mounted | RX57 | RX67 | RX77 | RX87 | RX97 | RX107 |
| RXF.. | Flange-mounted | RXF57 | RXF67 | RXF77 | RXF87 | RXF97 | RXF107 |
| Multi-stage | Size | |||||||
| 7 | 17 | 27 | 37 | 47 | 57 | 67 | ||
| R.. | Foot-mounted | R07 | R17 | R27 | R37 | R47 | R57 | R67 |
| R..F | Foot-mounted and flange-mounted | R07F | R17F | R27F | R37F | R47F | R57F | R67F |
| RF.. | B5 flange-mounted | RF07 | RF17 | RF27 | RF37 | RF47 | RF57 | RF67 |
| RZ.. | B14 flange-mounted | RZ07 | RZ17 | RZ27 | RZ37 | RZ47 | RZ57 | RZ67 |
| RM.. | Flange-mounted with extended bearing hub | – | – | – | – | – | RM57 | RM67 |
| Multi-stage | Size | |||||||
| 77 | 87 | 97 | 107 | 137 | 147 | 167 | ||
| R.. | Foot-mounted | R77 | R87 | R97 | R107 | R137 | R147 | R167 |
| R..F | Foot-mounted and flange-mounted | R77F | R87F | R97F | R107F | R137F | R147F | R167F |
| RF.. | B5 flange-mounted | RF77 | RF87 | RF97 | RF107 | RF137 | RF147 | RF167 |
| RZ.. | B14 flange-mounted | RZ77 | RZ87 | – | – | – | – | – |
| RM.. | Flange-mounted with extended bearing hub | RM77 | RM87 | RM97 | RM107 | RM137 | RM147 | RM167 |