They run quieter than the straight, specifically at high speeds
They have an increased contact ratio (the number of effective teeth engaged) than straight, which escalates the load carrying capacity
Their lengths are fine round numbers, e.g. 500.0 mm and 1,000.0 mm, for easy integration with machine bed lengths; Directly racks lengths are always a multiple of pi., electronic.g. 502.65 mm and 1005.31 mm.
A rack and pinion is a kind of linear actuator that comprises a couple of gears which convert rotational motion into linear motion. This mixture of Rack gears and Spur gears are generally called “Rack and Pinion”. Rack and pinion combinations tend to be used as part of a straightforward linear actuator, where in fact the rotation of a shaft run yourself or by a electric motor is converted to linear motion.
For customer’s that want a more accurate movement than normal rack and pinion combinations can’t provide, our Anti-backlash spur gears are available to be utilized as pinion gears with our Rack Gears.
The rack product range contains metric pitches from module 1.0 to 16.0, with linear force capacities as high as 92,000 lb. Rack styles include helical, directly (spur), integrated and circular. Rack lengths up to 3.00 meters can be found regular, with unlimited travels lengths possible by mounting segments end-to-end.
Helical versus Straight: The helical style provides a number of key benefits over the straight style, including:
These drives are perfect for a wide variety of applications, including axis drives requiring precise positioning & repeatability, touring gantries & columns, choose & place robots, CNC routers and material handling systems. Large load capacities and duty cycles may also be easily managed with these drives. Industries served include Material Managing, Linear Gearrack Automation, Automotive, Aerospace, Machine Tool and Robotics.
Timing belts for linear actuators are usually made of polyurethane reinforced with internal steel or Kevlar cords. The most common tooth geometry for belts in linear actuators is the AT profile, which has a large tooth width that provides high level of resistance against shear forces. On the driven end of the actuator (where in fact the electric motor can be attached) a precision-machined toothed pulley engages with the belt, while on the non-driven end, a flat pulley simply provides assistance. The non-driven, or idler, pulley is often used for tensioning the belt, although some designs offer tensioning mechanisms on the carriage. The kind of belt, tooth profile, and applied stress pressure all determine the pressure which can be transmitted.
Rack and pinion systems found in linear actuators contain a rack (also referred to as the “linear gear”), a pinion (or “circular gear”), and a gearbox. The gearbox helps to optimize the 
acceleration of the servo electric motor and the inertia match of the machine. The teeth of a rack and pinion drive can be straight or helical, although helical teeth are often used due to their higher load capability and quieter procedure. For rack and pinion systems, the utmost force that can be transmitted is certainly largely dependant on the tooth pitch and how big is the pinion.
Our unique knowledge extends from the coupling of linear system components – gearbox, electric motor, pinion and rack – to outstanding system solutions. We offer linear systems perfectly made to meet your unique application needs when it comes to the easy running, positioning precision and feed pressure of linear drives.
In the research of the linear motion of the gear drive mechanism, the measuring platform of the gear rack is designed to be able to gauge the linear error. using servo motor straight drives the gears on the rack. using servo electric motor directly drives the gear on the rack, and is dependant on the motion control PT point setting to recognize the measurement of the Measuring distance and standby control requirements etc. In the process of the linear motion of the apparatus and rack drive mechanism, the measuring data is usually obtained utilizing the laser interferometer to gauge the placement of the actual motion of the apparatus axis. Using minimal square method to solve the linear equations of contradiction, and also to expand it to a variety of times and arbitrary amount of fitting functions, using MATLAB development to obtain the actual data curve corresponds with style data curve, and the linear positioning precision and repeatability of equipment and rack. This technology could be extended to linear measurement and data analysis of the majority of linear motion mechanism. It can also be used as the basis for the automatic compensation algorithm of linear movement control.
Consisting of both helical & directly (spur) tooth versions, in an assortment of sizes, materials and quality levels, to meet almost any axis drive requirements.