They run quieter than the straight, specifically at high speeds
They have a higher contact ratio (the amount of effective teeth engaged) than straight, which increases the load carrying capacity
Their lengths are good circular numbers, e.g. 500.0 mm and 1,000.0 mm, for easy integration with machine bed lengths; Directly racks lengths are generally a multiple of pi., e.g. 502.65 mm and 1005.31 mm.
A rack and pinion is a type of linear actuator that comprises a pair of gears which convert rotational motion into linear motion. This mixture of Rack gears and Spur gears are usually known as “Rack and Pinion”. Rack and pinion combinations tend to be used as part of a straightforward linear actuator, where the rotation of a shaft powered by hand or by a motor is changed into linear motion.
For customer’s that require a more accurate movement than regular rack and pinion combinations can’t provide, our Anti-backlash spur gears are available to be used as pinion gears with our Rack Gears.
The rack product range includes metric pitches from module 1.0 to 16.0, with linear force capacities of up to 92,000 lb. Rack styles include helical, straight (spur), integrated and circular. Rack lengths up to 3.00 meters are available regular, with unlimited travels lengths possible by mounting segments end-to-end.
Helical versus Directly: The helical style provides several key benefits more than the straight style, including:
These drives are perfect for a wide variety of applications, including axis drives requiring exact positioning & repeatability, vacationing gantries & columns, choose & place robots, CNC routers and materials handling systems. Large load capacities and duty cycles may also be easily managed with these drives. Industries served include Materials Managing, Automation, Automotive, Aerospace, Machine Tool and Robotics.
Timing belts for linear actuators are typically made of polyurethane reinforced with internal metal or Kevlar cords. The most common tooth geometry for belts in linear actuators is the AT linear gearrack china profile, which includes a big tooth width that delivers high level of resistance against shear forces. On the powered 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 set pulley simply provides assistance. The non-driven, or idler, pulley can be often utilized for tensioning the belt, although some styles offer tensioning mechanisms on the carriage. The kind of belt, tooth profile, and applied tension power all determine the pressure that can be transmitted.
Rack and pinion systems used in linear actuators contain a rack (also referred to as the “linear equipment”), a pinion (or “circular equipment”), and a gearbox. The gearbox helps to optimize the velocity of the servo electric motor and the inertia match of the machine. One’s teeth of a rack and pinion drive could be straight or helical, although helical tooth are often used because of their higher load capacity and quieter procedure. For rack and pinion systems, the maximum force which can be transmitted is certainly largely determined by the tooth pitch and how big is the pinion.
Our unique understanding extends from the coupling of linear program components – gearbox, motor, pinion and rack – to outstanding system solutions. We offer linear systems perfectly made to meet your specific application needs in terms of the soft running, positioning accuracy and feed power of linear drives.
In the research of the linear motion of the gear drive mechanism, the measuring system of the gear rack is designed to be able to measure the linear error. using servo engine directly drives the gears on the rack. using servo engine directly drives the apparatus on the rack, and is dependant on the movement control PT point mode to realize the measurement of the Measuring distance and standby control requirements etc. In the process of the linear motion of the apparatus and rack drive system, the measuring data is certainly obtained utilizing the laser interferometer to gauge the position of the actual movement of the gear axis. Using the least square method to resolve the linear equations of contradiction, and to expand it to any number of occasions and arbitrary number of fitting functions, using MATLAB programming to obtain the actual data curve corresponds with design data curve, and the linear positioning precision and repeatability of gear and rack. This technology can be extended to linear measurement and data evaluation of the majority of linear motion system. It may also be used as the foundation 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.