A rack and pinion mechanism can be used to transform rotary movement into linear motion and vice versa. A circular spur equipment, the pinion, meshes with a spur gear which has teeth set in a straight series, the rack. Rack and pinion gears are accustomed to convert rotation into linear movement. A perfect example of this is actually the steering system on many vehicles. The tyre rotates a equipment which engages the rack. As the apparatus turns, it slides the rack either to the proper or left, based on which way you turn the wheel.
A rack and pinion program gives the capability to transfer rotary to linear movement, with all the accuracy expected of a geared system.
The racks are produced from ground, hardened stainless or ground stainless and available with a selection of accuracies, pitches, and lengths, in addition to the facility to provide 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.
Surface rack can be used for both measurement and actuation. Generally the smaller pitches (1 mm) fit measurement as small pinion diameter gives higher linear resolutions. The larger pitches (2 mm and 2.5 mm) allow for a higher load capacity. For most applications the rack can be used for both the opinions and the actuation; however in very specific applications it is advisable to us a non-drive portion of the rack for opinions, alternatively a separate rack can be used. Hobbed rack are more suitable for light actuation applications where price is an integral 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 be stationary and the rack pinion supplies the element of motion. Our rectangular racks are used with a electric motor, slide and carriage for instance in the printing industry for the actuation of paper reducing knives in a printing press. Circular rack are a more flexible alternative, in regards to to mounting, utilized for instance in XY phases. The tubular racks enable the passage of fluids, fibre-optics, gasses etc, producing them well suited for medical and scientific applications, such as for example laboratory automation choose and place mechanisms.
Round racks are perfect for linear actuators in accurate automation applications . Tubular racks are specially useful for medical and scientific applications, where the hollow shaft permits the passage of liquids, fibre Spur Gear Rack optics and gases.