Only for the stepper motors MT23FKxx and MT34FNxx standard series, is possible to require a spur gear of various reductions ratios already mounted on the motor.

| Family | Rapporto di riduzione | Coppia di picco |
|---|---|---|
| MT23FKxxxxxXxGx | da 1:3 a 1:150 | 5,0 Nm |
| MT34FNxxxxxXxGx | da 1:3 a 1:150 | 25,0 Nm |