Specification Brand : Boston Gear BulletPoint1 : Transmits torque between parallel shafts to provide rotational power to another part of a motorized system BulletPoint2 : Pressure angle of 14.5 degrees for a higher contact ratio between gears, resulting in quieter operation than larger pressure angles BulletPoint3 : Diametral pitch of 32 for applications where controlling changes in speed and direction of rotation with precision is more important than transferring torque BulletPoint4 : Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability BulletPoint5 : Note - Only gears of the same type can be used with racks. For example, a 1M rack can be used with all 1M gears. ExternallyAssignedProductIdentifier1 : 781711093047 ExternallyAssignedProductIdentifier2 : 0781711093047 FitType : Universal ItemName : Boston Gear G181 Spur Gear, 14.5 Pressure Angle, Brass, Inch, 32 Pitch, 0.312" Bore, 1.812" OD, 0.188" Face Width, 56 Teeth ItemPackageDimensions_Height : 5.08 centimeters ItemPackageDimensions_Length : 6.604 centimeters ItemPackageDimensions_Width : 5.334 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : spur-gears Manufacturer : Boston Gear Material : Brass ModelNumber : G181 NumberOfItems : 1 NumberOfTeeth : 56 PartNumber : G181 ProductDescription : Rack gears are straight bars with gear teeth running along one side into the gear teeth of a pinion. Usually, the teeth are straight (spur rack). Rack and pinion are sometimes used instead of an trapezoidal threaded shaft and nut to move a machine head in a back and forth motion. The spur rack is made of 45# steel, which has high hardness, strength, and strong deformation resistance, it is more durable, longer lasting, and easier to process, install, and debug. Racks are used to convert rotary motion into linear motion. The straight teeth of the rack are cut into one face of the square or circular section of the rod and fit with the pinion, which has the characteristics of mechanical simplicity, high load-carrying capacity, and unlimited length. Spur racks are paired with spur gears and are suitable for lifting mechanisms (vertical movement), horizontal movement, positioning mechanisms, stopping and allowing simultaneous rotation of multiple axes in industrial machinery. Notice: Only gears of the same type can be used with racks. For example, a 1M rack can be used with all 1M gears.