China factory High Precision Helical Rack and Pinion Power Steering Gear gear box

Product Description

High precision Gear and Rack

Brand TOCO 
Size customize CSTGH01510/2101/2571/3571/4571/4571/5571/5571/6571/6571/8571/8571/1571/12571,CHTGH57171/5711/5711/ 0571 1,CSGH,CHGH
Items packing Plastic bag+Cartons ,Wooden Packing 
Payment terms L/C,T/T,Western Union
Production lead time 5 days for offer ,2 month for sample 
Samples Sample price  range from $10to $20.
sample express request pay by clients
Application 1.milling 2.Boring 3. drilling
4.Form milling 5.Internal Boring  6.Precision drilling
7.Thread milling 8.Thread Boring 9.High-speed drilling
10.General milling 11. Plane Boring
12.Grinding 13.Lathing                  
14.Form Grinding  15.Internal Lathing
15.Thread Grinding 16.Thread Lathing  
17.General Grinding  18.Plane Lathing


About Us 

The spindle branch of Toco transmission , which was established in 2005, is mainly engaged in R&D and manufacture for varieties mechanical and motor spindles.
We provide spindles can be assembled in high speed milling machine, machining center, drilling machine, grinding machine, carving machine and so on. What’s more, our spindles are widely used in the circles like machinery manufacture, military, aviation, aerospace, shipbuilding and textile.
We not only provide standard high speed spindles but also offer special design according to customers’ concrete requirement.
We carefully chose international famous brand spare parts and can also do based on the customers’ nomination.
We possess excellent technical team, advanced machining equipments, precise testing apparatus. As a matter of fact, it is sure to guarantee the machining precision and good final assembly.
Our main machining equipments and testing apparatus (not all)
1. Machining equipments:
Turning center    GMX300                              Germany
Center hole grinding machine FISCHER(1000)          Switzerland
CNC universal grinding machine Kel-varial 1500VR      Switzerland  
2. Testing apparatus:
Three coordinate testing machine: REFERENCE1076       Germany
Pneumatic testing device:PC2000                      Switzerland
Height testing device:     M600MA                    Switzerland
Roundness testing device:Talyrond 265                U.K.

1. Service :
a. Help customer to choose correct model
b. Professional sales team, make your purchase smooth.
2.payment : 
Sample order: We require 100% T/T in advance. sample express need request pay by clients
Bulk order: 30% T/T in advance, balance by T/T against copy of B/L.
T/T,Paypal, Western Union is acceptable.
3.Delievery : 
sample: 5-10 business days after payment confirmed. 
Bulk order :10-20 workdays after  deposit received .
4. Guarantee time
TOCO provides 1 year quality guarantee for the products from your purchase date, except the artificial damage.
5.After sale-service 
During warranty period, any quality problem of CZPT product, once confirmed, we will send a new 1 to replace.

Contact Us

Miss Christy 

Standard or Nonstandard: Standard
Application: Garment Machinery, Conveyer Equipment, Packaging Machinery, Electric Cars, Motorcycle, Marine, Mining Equipment, Agricultural Machinery, Wood Cutting
Feature: Oil-Resistant, Cold-Resistant, Corrosion-Resistant, Alkali-Resistant, Skid-Resistance, Wear-Resistant, Acid-Resistant, High Temperature-Resistance
Tensile Strength: Strong
Material: S45c/Scm440
Type: Toothed Belt
US$ 1/Piece
1 Piece(Min.Order)

Request Sample



Customized Request

helical gear

How do you prevent backlash and gear play in a helical gear mechanism?

In a helical gear mechanism, preventing backlash and gear play is crucial to ensure accurate motion control, minimize vibration, and maintain the overall efficiency of the system. Here’s a detailed explanation of how to prevent backlash and gear play in a helical gear mechanism:

  1. Proper Gear Pair Alignment: Ensuring proper alignment of the gear pairs is essential to minimize backlash and gear play. Precise alignment helps to achieve optimal contact between the helical gear teeth, reducing gaps and potential for play. Proper alignment can be achieved through accurate positioning of the gear shafts and the use of alignment tools, such as dial indicators or laser alignment systems.
  2. Preload or Axial Play Adjustment: Applying a preload to the helical gears can help eliminate backlash and gear play. Preload refers to the intentional application of a force that compresses the gear mesh, ensuring a tight fit between the gear teeth. This can be achieved by using adjustable bearings, shims, or axial play adjustment mechanisms to control the axial position of the gears. By applying an appropriate preload, the gear teeth are kept in constant contact, minimizing any play or backlash.
  3. Accurate Gear Tooth Profile: High-quality manufacturing and accurate tooth profile design are essential to minimize backlash and gear play. The tooth profile should be precisely calculated to ensure proper engagement and minimal clearance between the gear teeth. This includes considerations such as the helix angle, tooth thickness, and tooth contact pattern. By using well-designed gear teeth with tight tolerances, backlash and gear play can be significantly reduced.
  4. Proper Gear Mesh Lubrication: Adequate lubrication is critical to reduce friction, wear, and the potential for backlash in helical gears. The lubricant helps to create a thin film between the mating gear surfaces, ensuring smooth and consistent gear meshing. Proper lubrication also helps to dissipate heat generated during operation, preventing gear tooth damage. The selection of a suitable lubricant and regular maintenance of the lubrication system are essential to prevent backlash and ensure optimal gear performance.
  5. Stiff Gearbox Design: A stiff and rigid gearbox design can help minimize gear play and backlash. The gearbox housing and supporting structures should be designed to withstand the forces and loads generated during operation. This prevents any flexing or movement of the gear components, ensuring stable gear meshing and minimizing the potential for backlash. Stiffening measures can include using robust materials, adequate bracing, and reinforcing the gearbox housing.
  6. Regular Maintenance and Inspection: Regular maintenance and inspection of the helical gear mechanism are essential to prevent backlash and gear play. This includes checking for any signs of wear, misalignment, or damage in the gear teeth, bearings, and housing. Any worn or damaged components should be promptly replaced to maintain the integrity of the gear system. Regular lubrication and cleanliness of the gears also contribute to minimizing backlash and ensuring smooth operation.

By implementing these preventive measures, engineers can effectively minimize backlash and gear play in a helical gear mechanism. This results in improved precision, reduced vibration, and enhanced overall efficiency of the gear system.

helical gear

How do you retrofit an existing mechanical system with helical gears?

Retrofitting an existing mechanical system with helical gears involves replacing the current gear system with helical gears to improve performance, efficiency, or address specific requirements. The process requires careful planning, analysis, and implementation to ensure a successful retrofit. Here is a detailed explanation of how to retrofit an existing mechanical system with helical gears:

  1. Assess the Existing System: Begin by thoroughly assessing the existing mechanical system. Understand its design, operating conditions, gear specifications, and performance limitations. Identify the reasons for retrofitting, such as the need for increased load capacity, improved efficiency, noise reduction, or other specific requirements.
  2. Define Retrofit Objectives: Clearly define the objectives of the retrofit. Determine the specific improvements or modifications desired from the retrofit. This could include increasing torque capacity, reducing backlash, improving gear meshing characteristics, or optimizing gear ratios. Having well-defined objectives will guide the retrofitting process.
  3. Perform Gear Design and Analysis: Based on the defined objectives, conduct gear design and analysis to determine the appropriate helical gear configuration. Consider factors such as gear size, tooth profile, helix angle, module or diametral pitch, and gear material. Use engineering calculations, software simulations, or consult with gear design experts to ensure the selected helical gears meet the retrofit objectives and are compatible with the existing system.
  4. Modify Gear Housing and Mounting: In some cases, retrofitting with helical gears may require modifications to the gear housing or mounting arrangements. Ensure that the gear housing can accommodate the helical gears and provide proper alignment and support. Modify or adapt the housing as necessary to ensure a precise fit and alignment of the new gear system.
  5. Manufacture or Source Helical Gears: Once the gear design is finalized, manufacture or source the helical gears according to the specifications determined during the design phase. Work with experienced gear manufacturers or suppliers who can provide high-quality helical gears that meet the required specifications and performance criteria.
  6. Installation and Alignment: Remove the existing gears and install the helical gears in the mechanical system. Ensure proper alignment of the gears to maintain smooth operation and minimize wear. Follow recommended installation procedures and torque specifications provided by the gear manufacturer. Consider using alignment tools, such as dial indicators or laser alignment systems, to achieve precise gear alignment.
  7. Test and Fine-tune: After installation, conduct thorough testing of the retrofit system. Monitor performance, check for any abnormal vibrations, noise, or operating issues. Fine-tune the system as needed, making adjustments to gear meshing, lubrication, or other parameters to optimize performance and ensure the retrofit objectives are met.
  8. Monitor and Maintain: Once the retrofit is complete, establish a regular monitoring and maintenance schedule. Periodically inspect the helical gears for wear, perform lubrication checks, and address any maintenance requirements. Regular monitoring and maintenance will help ensure the longevity and optimal performance of the retrofit system.

Retrofitting an existing mechanical system with helical gears can significantly enhance its performance, efficiency, and reliability. However, it is essential to carefully plan and execute the retrofitting process to achieve the desired outcomes. Consulting with gear design experts and experienced professionals can provide valuable guidance and expertise throughout the retrofitting process.

helical gear

Are there different types of helical gears available?

Yes, there are different types of helical gears available to meet specific application requirements. Here’s a detailed explanation of some common types of helical gears:

  1. Parallel Helical Gears: Parallel helical gears are the most commonly used type of helical gears. In this configuration, two helical gears with parallel axes are meshed together. They transmit power and motion between parallel shafts. Parallel helical gears provide smooth operation, high load-carrying capacity, and efficient power transmission.
  2. Double Helical Gears (Herringbone Gears): Double helical gears, also known as herringbone gears, have two sets of helical teeth that are placed in a V-shaped configuration. The V-shaped teeth face each other, with a groove or gap in the middle. This design cancels out the axial thrust that is generated by the helical gear’s inclined teeth. Double helical gears are often used in applications that require high torque transmission and axial load balancing, such as heavy machinery and marine propulsion systems.
  3. Crossed Helical Gears (Screw Gears): Crossed helical gears, also referred to as screw gears, involve the meshing of two helical gears with non-parallel and non-intersecting axes. The gears are oriented at an angle to each other, typically 90 degrees. Crossed helical gears are used in applications where shafts intersect or when a compact and non-parallel gear arrangement is required. They are commonly found in hand drills, speedometers, and some mechanical watches.
  4. Skew Gears: Skew gears are a type of helical gear in which the gear teeth are cut at an angle to the gear axis. The angle of the teeth can vary, allowing for different degrees of skew. Skew gears are used in applications where the axes of the mating gears are neither parallel nor intersecting. They can transmit power between non-parallel and non-intersecting shafts while accommodating misalignments.
  5. Helical Rack and Pinion: A helical rack and pinion system consists of a helical gear (pinion) that meshes with a linear gear (rack). The pinion is a cylindrical gear with helical teeth, while the rack is a straight bar with teeth that mesh with the pinion. This configuration is commonly used in applications that require linear motion, such as CNC machines, robotics, and rack and pinion steering systems in automobiles.
  6. Variable Helix Gears: Variable helix gears have a unique tooth profile where the helix angle varies along the face width of the gear. The varying helix angle helps to reduce noise, vibration, and backlash while maintaining smooth operation and load distribution. These gears are often used in high-performance applications where noise reduction and precise motion control are critical.

The specific type of helical gear used depends on factors such as the application requirements, load conditions, space limitations, and desired performance characteristics. Manufacturers often provide various options and customizations to meet specific needs.

It’s important to note that the design and manufacturing of helical gears require careful consideration of factors such as tooth profile, helix angle, lead angle, module or pitch, pressure angle, and material selection. These factors ensure proper gear meshing, load distribution, and efficient power transmission.

In summary, different types of helical gears, including parallel helical gears, double helical gears (herringbone gears), crossed helical gears (screw gears), skew gears, helical rack and pinion systems, and variable helix gears, are available to cater to a wide range of applications. Each type has its unique characteristics and advantages, allowing for optimized performance and reliable power transmission in various industries and machinery.

China factory High Precision Helical Rack and Pinion Power Steering Gear gear boxChina factory High Precision Helical Rack and Pinion Power Steering Gear gear box
editor by CX 2023-09-05