China Standard Plastic Stainless Steel Metric Linear Round Helical Spur Curved Steering Gear Pinion Rack for Automatic Door Gate Window Opener raw gear

Product Description

Gear And Rack Pinion

Product Description


Model number M1-M12
Material Brass, C45 steel,Stainless steel,Copper,POM,Aluminum,Alloy and so on
Surface treatment Zinc plated, Nickel plated, Passivation, Oxidation, Anodization, 
Geomet, Dacromet, Black Oxide, Phosphatizing, Powder Coating and Electrophoresis, etc
Standard ISO, DIN, ANSI, JIS, BS and Non-standard.
Precision DIN6,DIN7,DIN8,DIN9.
Teeth treatment Hardened,Milled or Ground
Tolerance 0.001mm-0.01mm-0.1mm
Finish  shot/sand blast, heat treatment, annealing, tempering, polishing, anodizing, zinc-plated



Packaging & Shipping

Packaging Details:  

1)Sample order packing by paper carton for saving freight charge; 

2)bulk order sent by sea will be packed by film and wooden carton.

3) as customer’s requirements.



Company Profile

Company Information:


ZheJiang Sair Mechanical Xihu (West Lake) Dis. Co., Ltd, which is mainly responsible for the production, 1 of the largest linear guide and ball screw manufacturer in China. With strong technical strength, advanced production equipments, and perfect after-sale services, our company is the leading precision machinery manufacturer, which have research and development, manufacturing, sales, service all in one. Our high-quality products are not only popular all over the country, but also exported to Europe, Americas, Southeast Asia, Africa etc. , totally more than 70 countries globally. Our products have good performance and are highly trusted and admired by all the domestic & overseas customers.




1. Q: How about the quality of your product?

    A: 100% inspection during production. 

       Our products are certified to ISO9001-2008 international quality standards.

2. Q: What’s the delivery time? 

    A: For custom order, within 2000 meters, 

        Production time is 15days after confirmed every details.

3. Q: What’s your packing?

    A: Our Normal packing is bulking in PE bag, and then into plywood Cartons. 

        We also can pack products according to your requirement.

4. Q: What about the warranty? 

    A: We are very confident in our products, 

        and we pack them very well to make sure the goods in well protection.

5.Q: Could you send me your catalogue and price list?

   A: As we have more than hundreds of products,

      it is really too hard to send all of catalogue and price list for you. 

      Please inform us the style you interested, we can offer the pricelist for your reference.

6.Q:There are a lot of companies which export bearings, why do you choose us?

  A: As we are a genuine linear guide supplier since 2011.and we are really factory, you need not pay the profit for middlemen.
so we can offer you the lowest and competitive price .

Thanks for your valuable time 🙂

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Application: Machinery
Hardness: Hardened Tooth Surface
Gear Position: Internal Gear
US$ 6/Piece
1 Piece(Min.Order)


Order Sample

not free


Customized Request

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Shipping Cost:

Estimated freight per unit.

about shipping cost and estimated delivery time.
Payment Method:


Initial Payment

Full Payment
Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

metric gear rack

How do metric gear racks handle different gear ratios?

Metric gear racks are not directly involved in handling different gear ratios. Gear ratios are determined by the combination of gear racks with other gears, such as spur gears, helical gears, or bevel gears. However, metric gear racks play a crucial role in the overall gear system and contribute to achieving the desired gear ratio. Here’s a detailed explanation of how metric gear racks interact with other gears to handle different gear ratios:

1. Gear Rack Basics: A gear rack is a linear toothed component with straight teeth that meshes with a gear. Unlike traditional gears that rotate, gear racks provide linear motion. They are often used in conjunction with other gears to convert rotational motion into linear motion or vice versa. Gear racks typically have teeth cut along one edge, and these teeth engage with the teeth of the mating gear to transmit power and motion.

2. Spur Gear Systems: One common configuration is to use a spur gear in combination with a gear rack to achieve a specific gear ratio. A spur gear is a cylindrical gear with straight teeth that mesh with the teeth of the gear rack. The gear ratio in this system is determined by the number of teeth on the gear and the length of the gear rack. By selecting gears with different numbers of teeth or using gear racks of varying lengths, different gear ratios can be achieved. The gear ratio is calculated as the ratio of the number of teeth on the gear to the length of the gear rack.

3. Helical Gear Systems: In helical gear systems, helical gears with angled teeth are often used in conjunction with gear racks. Helical gears offer advantages such as smoother operation and increased load-carrying capacity compared to spur gears. The gear ratio in a helical gear system is determined by the number of teeth on the gear and the pitch of the helical gear. The gear rack meshes with the helical gear at a specific angle, and as the gear rotates, it translates the rotational motion into linear motion along the gear rack.

4. Bevel Gear Systems: Bevel gear systems involve the use of bevel gears, which have conical-shaped teeth, to transmit motion between non-parallel shafts. While gear racks are not typically used directly in bevel gear systems, they can be incorporated in conjunction with other gears to achieve specific motion requirements. For example, a bevel gear system may use a combination of bevel gears and gear racks to transmit motion and adjust the gear ratio between intersecting or perpendicular shafts.

It is important to note that the gear ratio achieved in a gear system is not solely determined by the gear rack itself but by the combination of gears and their respective sizes, tooth counts, and profiles. The gear rack’s length or the number of teeth on the rack may influence the overall gear ratio, but it is the interaction between the gear rack and the mating gear that determines the specific ratio achieved.

In summary, metric gear racks are integral components in gear systems that involve the conversion of rotational motion to linear motion or vice versa. They work in conjunction with other gears, such as spur gears, helical gears, or bevel gears, to achieve the desired gear ratio. By selecting gears with different tooth counts and combining them with appropriate gear racks, engineers can design gear systems that handle different gear ratios to meet specific application requirements.

metric gear rack

Can metric gear racks be applied in CNC machining for positioning?

Yes, metric gear racks can be effectively applied in CNC (Computer Numerical Control) machining for precise positioning. Here’s a detailed explanation of how metric gear racks can be used in CNC machining:

1. Precision Positioning: CNC machining requires precise positioning of the cutting tool or workpiece to achieve accurate machining operations. Metric gear racks, when combined with compatible mating gears and a motor, provide a reliable method for converting rotary motion into linear motion. By incorporating a gear rack system into the CNC machine’s axis, such as the X, Y, or Z axis, precise and repeatable linear motion can be achieved. The toothed engagement between the gear rack and the mating gear ensures accurate positioning, enabling the CNC machine to move the cutting tool or workpiece to the desired location with high precision.

2. High Load Capacity: CNC machining often involves handling substantial loads, including the cutting forces exerted on the tool and the weight of the workpiece. Metric gear racks are designed to handle high loads, making them suitable for CNC machining applications. The rack’s robust construction, combined with its ability to distribute loads along the entire length of the rack, ensures efficient power transmission and reliable load handling capabilities. This allows the gear rack system to withstand the forces involved in CNC machining without compromising precision or performance.

3. Longitudinal and Transverse Motion: CNC machines typically have multiple axes of movement to perform various machining operations. Metric gear racks can be applied to both longitudinal (X-axis) and transverse (Y-axis) motion in CNC machining. The gear rack systems can be integrated with linear guides and bearings to provide smooth and precise linear motion along these axes, facilitating accurate positioning of the cutting tool or workpiece in multiple directions. By using gear racks, CNC machines can achieve synchronized and coordinated motion control across different axes, enabling complex machining operations with high accuracy.

4. Backlash Compensation: Backlash, which refers to the slight clearance between the gear rack and mating gear, can introduce positional errors and affect precision in CNC machining. However, metric gear racks can incorporate backlash compensation techniques to minimize the effects of backlash. By utilizing pre-loaded systems or employing gear racks with high tooth engagement ratios, CNC machines can reduce backlash and achieve improved precision in positioning. This ensures that the CNC machine accurately follows the programmed toolpath, resulting in precise machining operations.

5. Compatibility with CNC Systems: Metric gear racks can be seamlessly integrated with CNC control systems and other components commonly used in CNC machines. The gear rack system can be coupled with CNC motors, encoders, and feedback systems to create a comprehensive and synchronized motion control solution. This compatibility allows for precise and coordinated positioning control, ensuring that the CNC machine accurately follows the programmed toolpath and achieves the desired machining results.

6. Customizability and Flexibility: Metric gear racks offer flexibility and customization options to suit different CNC machining applications. They are available in various sizes, modules, and materials, allowing engineers to select gear racks that meet the specific requirements of the CNC machine. Customizable features include tooth profile design, load capacity, and dimensional specifications. This flexibility enables the optimization of gear rack selection based on factors such as load, speed, precision, and environmental conditions, ensuring optimal performance in CNC machining applications.

7. Reliability and Durability: CNC machines are often subjected to continuous operation and demanding machining conditions. Metric gear racks are designed to offer high reliability and durability, ensuring long service life and minimal downtime. The use of high-quality materials, precision manufacturing processes, and proper lubrication contributes to the gear racks’ ability to withstand heavy loads, repetitive motion, and challenging operating conditions. This reliability and durability make gear racks a suitable choice for CNC machining applications.

In summary, metric gear racks can be effectively applied in CNC machining for precise positioning. Their ability to provide precise linear motion, handle high loads, compensate for backlash, compatibility with CNC systems, customizability, and reliability make gear racks a suitable choice for achieving accurate and repeatable motion control in CNC machines. By incorporating gear racks into CNC machining systems, manufacturers can enhance the precision and performance of their machining operations, resulting in high-quality finished products.

metric gear rack

What advantages do metric gear racks offer for precise linear motion?

Metric gear racks offer several advantages for achieving precise linear motion. Here’s a detailed explanation of the advantages they provide:

1. High Accuracy: Metric gear racks are designed with teeth that mesh with compatible gears or pinions. This toothed engagement ensures accurate and repeatable linear motion. The teeth on the gear rack and the mating gear or pinion create a positive drive system, eliminating backlash and minimizing positioning errors. This high level of accuracy allows for precise movement and positioning in applications where precision is critical.

2. Precise Positioning: Gear racks enable precise positioning of components or objects along a linear path. By meshing with gears or pinions that convert rotary motion into linear motion, gear racks provide a reliable means of achieving controlled and accurate displacement. This precise positioning capability is essential in applications such as CNC machines, robotic arms, and automated assembly systems, where components need to be placed or moved with high accuracy.

3. Smooth and Stable Motion: Metric gear racks ensure smooth and stable linear motion. The teeth on the gear rack engage with the mating gears or pinions, providing a constant and controlled transfer of motion. This results in consistent and uniform movement without jerks or sudden changes in speed. The smooth and stable motion facilitated by gear racks is crucial for applications that require controlled and reliable movement, such as conveyor systems and linear actuators.

4. Load Capacity: Gear racks offer high load-carrying capacity, making them suitable for applications that involve moving heavy objects or exerting significant forces. The toothed engagement between the gear rack and mating gears or pinions distributes the load evenly along the length of the rack. This load distribution capability allows gear racks to handle substantial loads without compromising the accuracy of linear motion. It is particularly advantageous in industries such as material handling, robotics, and automotive manufacturing.

5. Long Life and Durability: Metric gear racks are designed to withstand continuous use and offer long service life. They are typically made from high-quality materials such as steel or other robust alloys, providing excellent durability and resistance to wear and fatigue. The tooth profile and surface finish of gear racks are engineered to minimize friction and wear during operation. This durability ensures reliable and consistent performance over extended periods, even in demanding environments.

6. Versatility and Compatibility: Metric gear racks offer versatility and compatibility with a wide range of gear systems. They can be used with various types of gears or pinions, allowing for flexibility in system design and integration. Gear racks are available in different sizes, modules, and tooth profiles, making them suitable for diverse applications and requirements. Their compatibility with different gear systems enhances their versatility and ease of implementation in machinery and equipment.

7. Cost-Effective Solution: Metric gear racks offer a cost-effective solution for achieving precise linear motion. Compared to other linear motion mechanisms, such as linear guides or ball screws, gear racks are often more affordable while providing comparable levels of accuracy. Gear racks also have a simpler design and require minimal maintenance, resulting in cost savings over the product’s lifetime. This cost-effectiveness makes gear racks an attractive choice for applications that require precise linear motion within budget constraints.

These advantages make metric gear racks highly suitable for applications that demand precise linear motion, such as CNC machines, robotics, automation systems, and material handling equipment. The combination of accuracy, positioning capability, load capacity, durability, and cost-effectiveness makes gear racks a reliable and efficient solution for achieving precise linear motion in various industries.

China Standard Plastic Stainless Steel Metric Linear Round Helical Spur Curved Steering Gear Pinion Rack for Automatic Door Gate Window Opener raw gearChina Standard Plastic Stainless Steel Metric Linear Round Helical Spur Curved Steering Gear Pinion Rack for Automatic Door Gate Window Opener raw gear
editor by CX 2024-03-26