Understanding the loads is vital for material selection and motor sizing. The actual driving force exerted on the rack. (where T is Torque) Radial Force ( Frcap F sub r ): The force pushing the rack and pinion apart. Normal Force ( Fncap F sub n ): The total force acting on the tooth surface. 4. Design Considerations for Precision

To begin any calculation, you must define the basic parameters of the gear (pinion) and the flat gear (rack).

The distance the rack moves per one full revolution of the pinion.

Proper grease or oil is necessary to prevent wear, especially in high-speed applications. 5. Step-by-Step Calculation Example