A rack and pinion mechanism can be used to transform rotary motion into linear motion and vice versa. A circular spur gear, the pinion, meshes with a spur equipment which has teeth occur a straight series, the rack. Rack and pinion gears are accustomed to convert rotation 
into linear movement. An ideal example of this is actually the steering program on many cars. The tyre rotates a equipment which engages the rack. As the gear turns, it slides the rack either to the proper or left, based on which way you convert the wheel.
A rack and pinion system gives the capability to transfer rotary to linear motion, with all the accuracy expected of a geared program.
The racks are produced from ground, hardened stainless steel or ground stainless and available with a selection 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 plain or anti-backlash, also with a choice of accuracies, pitches, bore sizes, alternative components and coatings.
Floor rack can be used for both measurement and actuation. Generally the smaller pitches (1 mm) suit measurement as the smaller pinion diameter gives higher linear resolutions. The bigger pitches (2 mm and 2.5 mm) allow for an increased load capacity. For most applications the rack can be used for both the feedback and the actuation; however in very precise 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 suited to light actuation applications where price is a key consideration.
You can expect three types of rack – rectangular, solid round and tubular rack. Rectangular rack are used when the application requires the rack to end up being stationary and the rack pinion supplies the element of motion. Our rectangular racks are used with a electric motor, slide and carriage for example in the printing market for the actuation of paper slicing knives in a printing press. Round rack certainly are a more versatile alternative, in regards to to mounting, utilized for instance in XY phases. The tubular racks enable the passage of liquids, fibre-optics, gasses etc, making them well suited for medical and scientific applications, such as for example laboratory automation pick and place mechanisms.
Round racks are well suited for linear actuators in Spur Gear Rack accurate automation applications . Tubular racks are specially useful for medical and scientific applications, where in fact the hollow shaft allows for the passage of liquids, fibre optics and gases.