A rack and pinion mechanism is used to transform rotary movement into linear motion and vice versa. A round spur equipment, the pinion, meshes with a spur gear which has teeth occur a straight collection, the rack. Rack and pinion gears are used to convert rotation into linear movement. An ideal example of this is actually the steering system on many vehicles. The tyre rotates a gear which engages the rack. As the apparatus turns, it slides the rack either to the right or left, depending on which way you turn the wheel.
A rack and pinion system gives the ability to transfer rotary to linear movement, with all the accuracy expected of a geared system.
The racks are manufactured from ground, hardened stainless steel or ground stainless steel and available with a choice of accuracies, pitches, and lengths, plus the facility to supply modifications such as flats, journals or custom ends. Hobbed stainless and brass racks are also offered. The rack pinions are simple or anti-backlash, also with a choice of accuracies, pitches, bore sizes, alternative components and coatings.
Ground rack can be used for both measurement and actuation. Generally small pitches (1 mm) match measurement as the smaller pinion diameter gives higher linear resolutions. The larger pitches (2 mm and 2.5 mm) enable a higher load capacity. For most applications the rack can be used for both the feedback and the actuation; yet, in very specific applications it is best to us a non-drive section of the rack for opinions, alternatively a separate rack can be used. Hobbed rack are more suitable for light actuation applications where cost is a key consideration.
You can expect three types of rack – rectangular, solid circular and tubular rack. Rectangular rack are utilized when the application needs the rack to end up being stationary and the rack pinion supplies the element of movement. Our rectangular racks are used with a motor, slide and carriage for instance in the printing industry for the actuation of paper trimming knives in a printing press. Circular rack are a more versatile alternative, with regard to mounting, used for instance in XY phases. The tubular racks enable the Spur Gear Rack passage of fluids, fibre-optics, gasses etc, producing them well suited for medical and scientific applications, such as laboratory automation choose and place mechanisms.
Round racks are ideal for linear actuators in accurate automation applications . Tubular racks are especially useful for medical and scientific applications, where the hollow shaft allows for the passage of fluids, fibre optics and gases.