China Gear Rack

Precision in Motion: Unleash the Power of Our Gear Racks

Features of Gear Rack

Gear racks are toothed bars that work in conjunction with a pinion gear to convert rotational motion into linear motion and vice versa. Here are some key features and characteristics of gear racks:


Gear racks have a series of teeth along their length. The teeth are designed to mesh with the teeth of the pinion gear, allowing for smooth engagement and efficient power transmission.

Straight Profile

Gear racks have a straight profile, meaning the teeth are arranged in a straight line along the length of the rack. This straight design enables linear motion without any angular deviation.


The pitch of a gear rack refers to the distance between the centerline of one tooth to the centerline of the adjacent tooth. It determines the amount of linear displacement for each rotation of the pinion gear.


How Gear Rack Works

A gear rack is a mechanical device that works in conjunction with a pinion gear to convert rotational motion into linear motion or vice versa. The gear rack consists of a straight bar with teeth along its length, while the pinion gear is a small gear with teeth that engage with the rack’s teeth. When the pinion gear rotates, its teeth mesh with the teeth of the rack, causing the rack to move linearly. This linear motion can be used to drive other mechanisms or components. Conversely, when a linear force is applied to the rack, it causes the pinion gear to rotate, converting the linear motion into rotational motion. The engagement of the teeth ensures a smooth transfer of power, allowing for precise and controlled linear motion. Gear racks find applications in various industries where accurate and reliable linear motion control is required, such as in CNC machines, robotics, steering systems, and industrial machinery.

Rack and Pinion Materials and Heat Treatment


Rack and pinion systems are commonly used in various applications, such as steering systems in automobiles, machine tools, and robotics. The materials and heat treatment used for rack and pinion components depend on the specific requirements of the application and the desired mechanical properties. Here are some commonly used materials and heat treatment processes for rack and pinion systems:


Steel Alloys: Rack and pinion systems are often made from steel alloys due to their high strength and durability. Commonly used steel alloys include carbon steels, alloy steels (such as 4140, 4340), and stainless steels.

Cast Iron: Cast iron is another material used for rack and pinion systems, especially in heavy-duty applications. Cast iron provides excellent wear resistance and damping characteristics.

Heat Treatment:

Carburizing: Gear racks can undergo carburizing, which involves introducing carbon into the surface layer of the steel component. This process increases the material’s hardness and wear resistance, thereby improving the durability of the gear rack.

Quenching and Tempering: Quenching is a heat treatment process where the gear rack is rapidly cooled from a high temperature to increase its hardness. After quenching, tempering is performed to reduce brittleness and enhance the material’s toughness and strength. Both quenching and tempering processes are commonly employed for gear racks to optimize their mechanical properties.

Induction Hardening: Induction hardening is another surface heat treatment method used for gear racks. It selectively hardens specific areas of the rack by heating the surface with high-frequency induction currents, followed by quenching. Induction hardening provides localized hardness, thereby improving wear resistance while preserving the core toughness of the gear rack.

Nitriding: Nitriding is a process that involves diffusing nitrogen into the surface of the steel gear rack. This forms a hard nitride layer, significantly enhancing wear resistance, fatigue strength, and corrosion resistance. Nitriding is often applied to gear racks to improve their performance and prolong their lifespan.

Production of Racks and Pinions

The production of racks and pinions begins with material selection, choosing durable materials like steel or hardened plastics. Racks are cut into straight bars and machined to precise dimensions, with teeth cut along the length to achieve the correct profile, pitch, and spacing. Pinions are shaped from cylindrical or disk-shaped material using machining processes like turning or milling, followed by tooth cutting that matches the profile and pitch for proper engagement with the gear rack.

China Gear Rack

Custom Gear Racks

Gear Racks Engineered for Reliability and Durability

We recognize that every project is unique, with specific requirements and challenges. That’s why we take pride in our ability to provide customized gear rack solutions that precisely match our customers’ needs. Our team of skilled engineers and technicians work closely with clients, offering expert guidance and utilizing state-of-the-art technology to design and manufacture gear racks tailored to their exact specifications. Whether it’s a specific module, pitch, length, or special surface treatment, we have the flexibility and expertise to deliver the perfect solution.

China Best Sales M4 8*30*500 Iron Gear Rack with Factory Price plastic gear rack

Product Description Product DescriptionIron gear rackMade of Q235 steel for sliding doors, It is usually used with a door motor. Our products are exported to Southeast Asia, Europe, South America, etc. Reliable quality, Each piece of gear rack has screws, as shown...

China best CZPT Car Auto Steering Rack Pinion Gear Used for Chevrolet Sprint 4850986000 48509e86006 48509-86000 48509e-86006 angle gear rack

Product Description AELWEN NO.AEL-38533BRAND"AELWEN" or Customer's BrandLINKED VEHICLESUsed For Chevrolet Sprint  OE INFO48509-86000,48509E-86006XIHU (WEST LAKE) DIS.-DRIVELEFT HANDOTHER INFOHydraulic, Rack and PionSteering Gear Our factory is specialized in...

China best Factory M4 9*30*1998 Galvanized Gear Rack duty gear rack

Product Description Product DescriptionIron gear rackMade of Q235 steel for sliding doors, It is usually used with a door motor. Our products are exported to Southeast Asia, Europe, South America, etc. Reliable quality, Each piece of gear rack has screws, as shown...

China manufacturer Wholesale Price 6 Eyes Nylon Gear Rack for Sliding Gate round gear rack

Product Description Product DescriptionProductsGear rackPrecision gradeDIN5, DIN6, DIN7, DIN8, DIN10MaterialC45 steel, 304SS, 316SS, 40CrMo, nylon, POMHeat treatmentHigh frequency,Quenching/Carburization, Teeth hardenedSurface...

China OEM Auto Parts Power Steering Rack Steering Gear for Chevrolet Spark 96518943 96518944 with Best Sales

Product Description Detailed PhotosProduct NameSteering RackMaterialAluminum Steel RubberColoras picCar Fitment:UniversalCondition:New Our Advantages Company InformationHangZhou Miaosha Auto Parts Co.Ltd.was founded in 2005specializing in manufacturingand exporting...

China high quality China Wholesale Price Ebike, 48V 500W Electric Bicycle 20 X 4.0 Inch Electric Bike wholesaler

Product Description The CZPT Blast brand evolved through a group of friends from distant parts of the globe, joining forces to create a truly unique and affordable range of vintage inspired electric bicycles.Our #LifeStyle range has been heavily inspired by some of...

China Professional Hualong High Quality Automatic Tool Changer CNC Router Stone Machinery Marble Engraving Stone Craving Machine for Granite Glass Ceramic Cutting with Hot selling

Product Description CNC Stone Engraving Machine with Double HeadsHLSD-2030-2D, equipped with CNC control system and 2 working heads, is a reliable and versatile machine for engraving, drilling, lettering, cutting all kind of stones, such as marble, granite, quartize,...

China Custom High Precision CNC Metal Sheet Laser Cutter Table gear rack backlash

Product Description Model:BKJ-F3015Working Area:3000*1500mmPositioning Accuracy:0.03mmRepositioning Accuracy:0.02mmMax Movement Speed:140m/minLaser Power:1000WWorking Table:Blade Working TableMax Acceleration:1.4GApplicable materials: Fiber Laser cutter machine is...

China Best Sales CZPT Best Sale New MD 4+2 Seat 48V 4000W Electric Golf Car Club Car Golf Scooter 4 Wheel 6 Seater Red Golf Cart manufacturer

Product Description MMC Best Sale New MD 4+2 Seat 48V 4000W Electric Golf Car Club Car Golf Scooter 4 Wheel 6 Seater Red Golf CartProduct Description      Product Name:  Electric Golf CartPassenger capacity: 2-4-6-8-10-12 seatsExternal Dimensions:...

China Custom Mowing Boat/Aquatic Weed Harvester/ Floating Debris Garbage Cleaning Harvesting Machinery for Lake Water Treatment circular gear rack

Product Description Agricultural  underwater lawn mower aquatic weed harvester floating boat harvester for pond cleaning IntroductionThe aquatic weed harvester is a special mower for shrimps and crabs. The use of mechanical automation will cut all the various water...

Comparison of Rack Gear and Ball Screw

Rack gears and ball screws are two mechanical components used for linear motion, but they differ in their operating principles and characteristics. Rack gears convert rotary motion into linear motion through the meshing of a toothed bar (rack) with a gear (pinion), while ball screws achieve linear motion through the rolling of ball bearings between a threaded shaft (screw) and a nut. Rack gears offer higher efficiency and load-carrying capacity, making them suitable for high-speed and high-load applications. On the other hand, ball screws provide excellent precision, accuracy, and low backlash, making them ideal for applications that require precise positioning and repeatability. The choice between rack gears and ball screws depends on factors such as application requirements, load capacity, precision needs, and speed considerations.

Rack and Pinion Mechanism Design and Application Examples

The rack and pinion mechanism is a widely used mechanical system that converts rotary motion into linear motion and vice versa. It consists of a gear called a pinion and a toothed bar called a rack. Here are some design principles and application examples of the rack and pinion mechanism:

Gear Ratio

The gear ratio between the pinion and the rack determines the relationship between the linear displacement of the rack and the rotational motion of the pinion. It affects the speed and force transmission of the mechanism.

Tooth Profile

The teeth on the rack and pinion should be designed for efficient power transmission, ensuring smooth engagement and minimal backlash.

Material Selection

Both the rack and the pinion should be made from durable materials capable of handling the load, such as steel or hardened plastics.

Steering Systems

Rack and pinion systems are commonly used in automobile steering mechanisms. The rotational motion of the steering wheel is converted into linear motion through the rack and pinion, allowing the driver to control the direction of the vehicle.

CNC Machines

Computer Numerical Control (CNC) machines often employ rack and pinion systems for precise and rapid linear motion control. The rotary motion of the machine’s motor is translated into linear motion along the axes using rack and pinion mechanisms.

Industrial Machinery

Rack and pinion mechanisms find applications in various industrial machines, such as packaging equipment, material handling systems, and assembly lines. They enable precise and controlled linear motion in these systems.


Rack and pinion systems are used in robotics for linear actuation and movement control. They can be found in robot arms, grippers, and other robotic mechanisms that require linear motion.

Do You Need More Information on These Products?

Fill out the contact form or ask our technical department for a consultation

Store Hours

Monday–Friday: 6am – 5pm

Saturday: 8am – 4pm

Sunday: Closed