- RE/GB – Inline Planetary Gearbox
- RA/GBA – Right Angle Planetary Gearbox
- F – Female Output Support
- N – Male Output Support
- T – Reinforced Male Output Support
- TL – Reinforced Male Output Support
- H – Reinforced Male Output Support
- C – Cylindrical Shaft
- S – Splined Shaft
- E – HEX Shaft
- Q – Male Hollow Shaft for Shrink Disc
- ST – Universal Input Flange
- F# – Negative Static Multi Disc Brake
- AV – High Speed Input Shaft
- MO – Direct SAE A Motor Input
- ME – Direct Electric Motor Input IEC
- NEMA – Direct Electric Motor Input NEMA
- MU – Large Universal Input Flange
- MR – Direct SAE ASC Input
- CC – Bevel Gear