They run quieter compared to the straight, especially at high speeds
They have a higher contact ratio (the number of effective teeth engaged) than straight, which increases the load carrying capacity
Their lengths are nice round 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 set of gears which convert rotational motion into linear movement. This combination of Rack gears and Spur gears are usually called “Rack and Pinion”. Rack and pinion combinations tend to be used as part of a simple linear actuator, where the rotation of a shaft run by hand or by a linear gearrack china engine is converted to linear motion.
For customer’s that want 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 contains metric pitches from module 1.0 to 16.0, with linear force capacities of up to 92,000 lb. Rack styles include helical, directly (spur), integrated and circular. Rack lengths up to 3.00 meters are available standard, with unlimited travels lengths possible by mounting segments end-to-end.
Helical versus Straight: The helical style provides many key benefits more than the directly style, including:

These drives are ideal for a wide selection of applications, including axis drives requiring exact positioning & repeatability, vacationing gantries & columns, pick & place robots, CNC routers and material handling systems. Large load capacities and duty cycles may also be easily taken care of 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 profile, which has a sizable tooth width that provides high level of resistance against shear forces. On the powered end of the actuator (where the electric motor is usually attached) a precision-machined toothed pulley engages with the belt, while on the non-driven end, a flat pulley simply provides guidance. The non-powered, or idler, pulley is often used for tensioning the belt, although some styles offer tensioning mechanisms on the carriage. The kind of belt, tooth profile, and applied pressure drive all determine the power which can be transmitted.
Rack and pinion systems found in linear actuators consist of a rack (also referred to as the “linear equipment”), a pinion (or “circular equipment”), and a gearbox. The gearbox really helps to optimize the velocity of the servo motor and the inertia match of the machine. One’s teeth of a rack and pinion drive can be directly or helical, although helical the teeth are often used due to their higher load capability and quieter operation. For rack and pinion systems, the utmost force which can be transmitted is definitely largely dependant on the tooth pitch and the size of 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 designed to meet your unique application needs in conditions of the soft running, positioning accuracy and feed drive of linear drives.
In the research of the linear motion of the apparatus drive mechanism, the measuring system of the apparatus rack is designed in order to gauge the linear error. using servo electric motor straight drives the gears on the rack. using servo engine directly drives the apparatus on the rack, and is based on the motion control PT point setting to recognize the measurement of the Measuring distance and standby control requirements etc. Along the way of the linear motion of the apparatus and rack drive mechanism, the measuring data is definitely obtained utilizing the laser interferometer to gauge the placement of the actual motion of the apparatus axis. Using minimal square method to resolve the linear equations of contradiction, and also to prolong it to a variety of times and arbitrary quantity of fitting features, using MATLAB development to obtain the real 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 nearly all linear motion mechanism. It can also be used as the foundation for the automated compensation algorithm of linear movement control.
Comprising both helical & directly (spur) tooth versions, in an assortment of sizes, components and quality amounts, to meet almost any axis drive requirements.