They run quieter than the straight, especially at high speeds
They have an increased contact ratio (the amount of effective teeth engaged) than straight, which increases the load carrying capacity
Their lengths are wonderful circular numbers, e.g. 500.0 mm and 1,000.0 mm, for easy integration with machine bed lengths; Straight racks lengths are generally a multiple of pi., e.g. 502.65 mm and 1005.31 mm.
A rack and pinion is a kind of linear actuator that comprises a set of gears which convert rotational motion into linear motion. This combination of Rack gears and Spur gears are generally called “Rack and Pinion”. Rack and pinion combinations are often used within a simple linear actuator, where in fact the rotation of a shaft driven yourself or by a electric motor is converted to linear motion.
For customer’s that require a more accurate movement than common rack and pinion combinations can’t provide, our Anti-backlash spur gears can be found to be used as pinion gears with our Rack Gears.

The rack product range consists of 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 Directly: The helical style provides several key benefits over the directly style, including:

These drives are ideal for a wide range of applications, including axis drives requiring exact Linear Gearrack positioning & repeatability, traveling gantries & columns, choose & place robots, CNC routers and materials handling systems. Heavy load capacities and duty cycles may also be easily taken care of with these drives. Industries served include Materials Handling, Automation, Automotive, Aerospace, Machine Tool and Robotics.

Timing belts for linear actuators are usually manufactured from polyurethane reinforced with internal steel or Kevlar cords. The most common tooth geometry for belts in linear actuators may be the AT profile, which has a big tooth width that provides high level of resistance against shear forces. On the powered end of the actuator (where the electric motor is certainly attached) a precision-machined toothed pulley engages with the belt, while on the non-driven end, a set pulley simply provides guidance. The non-driven, or idler, pulley is definitely often used for tensioning the belt, although some designs provide tensioning mechanisms on the carriage. The kind of belt, tooth profile, and applied stress drive all determine the pressure that can be transmitted.
Rack and pinion systems found in linear actuators consist of a rack (generally known as the “linear gear”), 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 can be straight or helical, although helical teeth are often used due to their higher load capacity and quieter procedure. For rack and pinion systems, the utmost force which can be transmitted is definitely largely determined by the tooth pitch and how big is the pinion.
Our unique knowledge extends from the coupling of linear system components – gearbox, motor, pinion and rack – to outstanding system solutions. We offer linear systems perfectly made to meet your specific application needs in conditions of the clean running, positioning accuracy and feed force of linear drives.
In the research of the linear motion of the gear drive mechanism, the measuring system of the gear rack is designed in order to gauge the linear error. using servo electric motor directly drives the gears on the rack. using servo engine directly drives the apparatus on the rack, and is based on the movement control PT point mode to recognize the measurement of the Measuring range and standby control requirements etc. In the process of the linear motion of the gear and rack drive mechanism, the measuring data is definitely obtained by using the laser beam interferometer to measure the placement of the actual motion of the apparatus axis. Using minimal square method to solve the linear equations of contradiction, and to expand it to a variety of situations and arbitrary number of fitting functions, using MATLAB development to obtain the real data curve corresponds with design data curve, and the linear positioning precision and repeatability of equipment and rack. This technology could be prolonged to linear measurement and data analysis of the majority of linear motion mechanism. It can also be utilized as the basis for the automatic compensation algorithm of linear motion control.
Comprising both helical & straight (spur) tooth versions, in an assortment of sizes, materials and quality levels, to meet nearly every axis drive requirements.