Anti-Backlash Trapezoidal Nut for Linear Actuators

Maitu provides high-quality and durable Anti-Backlash Trapezoidal Nut for Linear Actuators in China. Maitu factory aims at the personalized needs of various linear actuator types (electric linear actuators, hydraulic linear actuators, pneumatic linear actuators), and provides scenario-oriented customization solutions. According to your linear actuator’s rated load, reciprocating frequency, stroke range, working temperature and installation interface size, we can flexibly customize key parameters such as trapezoidal thread specification (metric/inch), nut overall size, disc spring preload force, material selection and surface treatment.

Referring to the two basic configurations of linear actuator lead screws (rotating lead screw and rotating nut), the product adopts a universal interface design, which is compatible with mainstream linear actuator transmission components, and can be directly assembled with lead screws of various specifications without modifying the original actuator structure, greatly improving the efficiency of equipment upgrade and maintenance.

Product Technical Specifications

Note: * indicates special specifications, which can be customized according to your linear actuator’s type, rated load, reciprocating frequency and installation space. We can flexibly adjust the disc spring preload force and thread precision, and strictly follow GB/T 17587-2018 standard for production, to match the high-frequency reciprocating and variable load working needs of different linear actuators, ensuring that the axial backlash is effectively controlled and the transmission efficiency is maintained, which is in line with the working principle of linear actuator anti-backlash transmission. At the same time, we can provide both metric and imperial thread installation nuts according to your requirements, further improving compatibility.

Functional Highlights & Linear Actuator Adaptation Features

1. Disc spring composite preload, stable anti-backlash: Adopting the core design of disc spring composite preload combined with precision ground trapezoidal thread, different from the split-type spring and dual-elastic O-ring structures of previous products, it realizes uniform preload force distribution, can stably control the axial backlash within 0.004-0.01mm, fundamentally solving the problem of motion jitter, positioning deviation and transmission instability caused by axial backlash during high-frequency reciprocating motion of linear actuators, ensuring smooth and precise operation of the actuator.

2. High fatigue resistance, adapting to high-frequency reciprocation: Targeting the high-frequency reciprocating motion characteristics of linear actuators (up to 15 cycles/min), the disc spring adopts high-strength alloy material with excellent fatigue resistance, which can withstand 20,000+ times of reciprocating compression without fatigue deformation, and the integrated thread structure is not easy to wear, ensuring stable anti-backlash performance during long-term high-frequency operation, which is especially suitable for linear actuators that require continuous and stable operation.

3. Strong load-bearing capacity, adapting to variable loads: Linear actuators often bear variable loads during operation. This Anti-Backlash Trapezoidal Nut for Linear Actuators is made of high-strength wear-resistant material and undergoes precision machining, with strong static and dynamic load-bearing capacity, which can bear large axial thrust and radial load without deformation, and maintain stable transmission even when the load changes, adapting to the working characteristics of linear actuators in different application scenarios, and meeting the load-bearing requirements of trapezoidal lead screw elevators and other related equipment.

4. Low friction & high transmission efficiency: The thread surface is treated with special lubricating coating, which effectively reduces the friction coefficient between the nut and the lead screw, the friction coefficient is less than 0.08, the transmission efficiency is as high as 92% or more, which not only reduces the energy consumption of linear actuators, but also reduces the heat generation during operation, avoiding performance degradation caused by overheating, and ensuring the overall efficiency of the linear actuator system.

Performance Parameters & Strict Quality Control

1. Actuator-oriented material selection: Optional high-strength wear-resistant bronze alloy (high load-bearing, strong fatigue resistance) and reinforced engineering plastic (light weight, self-lubricating) materials. Among them, bronze alloy is suitable for heavy-load linear actuators (such as industrial hydraulic linear actuators, trapezoidal lead screw elevators), and reinforced engineering plastic is suitable for light-load high-frequency linear actuators (such as small electric linear actuators), fully matching the load and motion requirements of different linear actuators, and referring to the material selection standards of high-performance linear actuator nuts.

2. Precision indicators for linear transmission: Thread precision reaches ISO 4 level, pitch error is less than ±0.004mm, positional repeatability is ≤±0.006mm, backlash is controllable within 0.004-0.01mm, which is better than the general transmission precision of linear actuator trapezoidal nuts, ensuring that the linear actuator can achieve precise positioning and stable motion, and meeting the precision requirements of GB/T 17587-2018 standard.

3. Service life & durability: After surface hardening and anti-corrosion treatment, the surface hardness reaches HRC 56-60, the wear resistance is 75% higher than that of ordinary trapezoidal nuts, and the service life can reach more than 4.5 years under normal use and regular maintenance, adapting to the long-term continuous operation needs of linear actuators, reducing the frequency of component replacement and maintenance cost, which is in line with the durability requirements of trapezoidal lead screw elevators and other linear actuator-related equipment.

Maitu’s Advantages

1. Linear actuator-focused R&D capability: Our R&D team has 8 senior engineers with more than 8 years of experience in linear transmission and linear actuator components, focusing on the R&D and optimization of anti-backlash technology for linear actuator scenarios, mastering core technologies such as disc spring composite preload design and thread precision grinding, and optimizing the structure of the Anti-Backlash Trapezoidal Nut for Linear Actuators according to the high-frequency reciprocating and variable load characteristics of linear actuators, ensuring perfect adaptation to various types of linear actuators.

2. Standardized production & strict testing: Equipped with professional linear actuator nut production lines and precision testing equipment (such as fatigue testing machine, transmission efficiency tester), each product undergoes strict backlash detection, fatigue test, load-bearing test and high-temperature resistance test before leaving the factory, in line with GB/T 17587-2018 and GB/T 3098.1-2010 standards, with a qualification rate of 100%, ensuring that each nut can meet the high-performance requirements of linear actuators.

3. Rich customization experience for linear actuators: Having provided customized anti-backlash solutions for more than 2,900 linear actuator manufacturers and users, covering electric, hydraulic, pneumatic and other types of linear actuators, as well as trapezoidal lead screw elevator scenarios, we have rich experience in matching different linear actuator models, and can customize products according to the specific parameters and working conditions of your actuator.

4. Authoritative certification & market recognition: Passed ISO 9001 quality management system certification, RoHS environmental certification and CE certification, with a number of patents related to linear actuator anti-backlash transmission technology, serving domestic and foreign linear actuator brands, and the products have been highly recognized for their stability, durability and transmission efficiency, especially in the field of trapezoidal lead screw elevators and industrial linear actuators.

Customization Process & Full-Service Support System

1. Demand communication & scheme formulation: Our professional technical team provides one-on-one consultation, deeply understands your linear actuator type, rated load, reciprocating frequency, stroke range, working environment and installation interface requirements, and formulates targeted customization schemes, including material selection, disc spring preload force adjustment and structural design, and strictly refers to relevant national standards, to ensure the Anti-Backlash Trapezoidal Nut for Linear Actuators perfectly matches your linear actuator.

2. Sample trial production & performance test: According to the confirmed customization scheme, we complete 2D/3D drawing design, carry out sample trial production, and test the sample on the corresponding linear actuator to verify the anti-backlash effect, fatigue resistance, transmission efficiency and installation compatibility, and adjust and optimize until it meets your requirements before mass production, ensuring that the product meets the actual working needs of the linear actuator.

3. Packaging & transportation protection: Adopt anti-collision, moisture-proof and anti-oil packaging, which can effectively prevent the product from being damaged during transportation, avoid thread deformation and disc spring damage, and ensure that the product performance is not affected when it arrives at the destination, especially suitable for long-distance transportation of bulk orders.

4. Efficient delivery commitment: Standard models suitable for mainstream linear actuators are in stock, with a delivery time of 1-3 working days; customized products are delivered within 7-11 working days, effectively shortening your linear actuator upgrade and maintenance cycle, ensuring the normal operation of the equipment.

5. After-sales service & technical guidance: Provide 30-month quality guarantee period, professional technicians provide 24-hour online and on-site technical support, timely solve the installation, debugging and use problems of the product; provide free replacement if there is a product quality problem within the guarantee period, and provide regular maintenance guidance to extend the service life of the Anti-Backlash Trapezoidal Nut for Linear Actuators and the linear actuator.

Installation Guide & Daily Maintenance Tips

1. Installation steps: Before installation, clean the thread surface of the nut and the matching lead screw with a lint-free cloth dipped in industrial lubricating oil to remove dust, oil stains and other impurities, ensuring tight meshing and reducing initial friction; install the nut on the lead screw smoothly, avoid forced installation, adjust the disc spring preload force according to the linear actuator’s load and motion requirements, and firmly fix the flange to the linear actuator’s moving part to avoid loose installation that affects transmission precision and operational safety, especially for trapezoidal lead screw elevator-related installations.

2. Regular maintenance: It is recommended to check the backlash, disc spring status and thread cleanliness every 3 months (adjust according to the reciprocating frequency); if dust or oil stains are found, clean them in time; add a small amount of high-temperature resistant lubricating oil every 5 months to reduce friction, protect the thread and disc spring, and ensure long-term stable operation, which is conducive to maintaining the transmission efficiency of the linear actuator.

3. Storage requirements: Store in a clean, dry and well-ventilated environment (temperature 8-22℃, humidity ≤40%), avoid contact with high temperature, corrosive substances and sharp objects, prevent thread deformation, disc spring fatigue and surface damage, and ensure the anti-backlash performance of the Anti-Backlash Trapezoidal Nut for Linear Actuators, which is especially important for long-term storage of spare parts.

4. Usage precautions: During the operation of the linear actuator, avoid excessive load, violent start and stop, and do not disassemble the nut at will to prevent damage to the disc spring and thread structure; avoid foreign objects entering the thread gap to prevent transmission jamming and damage to the linear actuator; regularly check the self-locking performance to ensure operational safety, especially for trapezoidal lead screw elevator scenarios.

Applicable Linear Actuator Types & Application Scenarios

1. Electric linear actuators: Applicable to small and medium-sized electric linear actuators (such as industrial electric push rods, linear actuator modules), effectively eliminating axial backlash, ensuring stable motion and precise positioning, and suitable for automated production lines, intelligent equipment, medical equipment and other scenarios, as well as matching with trapezoidal lead screw elevators for precision transmission.

2. Hydraulic & pneumatic linear actuators: Suitable for heavy-load hydraulic and pneumatic linear actuators (such as hydraulic cylinders, pneumatic cylinders with linear transmission mechanisms), with strong load-bearing capacity and fatigue resistance, adapting to the high-load and high-frequency working characteristics of such actuators, and applicable to engineering machinery, metallurgical equipment, shipbuilding industry and other fields.

3. Industrial linear actuators: Applicable to industrial-grade linear actuators used in automated production, such as linear feeding actuators, linear lifting actuators and trapezoidal lead screw elevators, with stable anti-backlash performance and high transmission efficiency, ensuring the consistency and stability of production operations, improving production efficiency and product quality, and meeting the stability requirements of industrial scenarios.

4. Special linear actuators: Suitable for special linear actuators (such as high-temperature linear actuators, outdoor linear actuators), with strong environmental adaptability and corrosion resistance, adapting to harsh working environments, and applicable to aerospace, automotive manufacturing, outdoor equipment and other fields, as well as special-purpose trapezoidal lead screw elevators.

FAQ & Professional Technical Support

1. What is the difference between this product and the previous anti-backlash trapezoidal nuts? 

The 3D printer version adopts a split-type spring preload structure, focusing on cost-effectiveness and easy maintenance; the positioning system version adopts a dual-elastic O-ring preload design, focusing on high precision and long-term stability; this Anti-Backlash Trapezoidal Nut for Linear Actuators adopts a disc spring composite preload structure, focusing on fatigue resistance and high-frequency reciprocating adaptation, which is specially designed for the high-frequency reciprocating and variable load characteristics of linear actuators, and is more in line with the working requirements of trapezoidal lead screw elevators and other related equipment.

2. Can this product be adapted to the lead screw of my existing linear actuator? 

Yes, our standard models are compatible with mainstream trapezoidal lead screws used in linear actuators, and we can also customize the thread specification and nut size according to your lead screw parameters, and provide both metric and imperial thread options, ensuring direct assembly without modifying the original actuator structure, and matching the two basic configurations of linear actuator lead screws (rotating lead screw and rotating nut).

3. How to adjust the disc spring preload force to match different working conditions? 

The product is designed with an adjustable preload structure, which can flexibly adjust the compression degree of the disc spring according to the linear actuator’s load, reciprocating frequency and positioning precision requirements, balancing anti-backlash effect and transmission smoothness, and adapting to different working conditions of linear actuators and trapezoidal lead screw elevators.

4. How to judge whether the anti-backlash effect of the nut is normal during use? 

After installation, start the linear actuator to run at normal speed, observe whether there is motion jitter or abnormal noise; use a precision measuring instrument to detect the positioning repeatability, if the repeatability error is within ±0.006mm, it indicates that the anti-backlash effect is normal, and the product meets the precision requirements of GB/T 17587-2018 standard.

5. What is the service life of the disc spring? 

The disc spring adopts high-strength fatigue-resistant alloy material, which can maintain stable performance for more than 4.5 years under normal use and high-frequency reciprocating motion, and can be replaced independently when worn, which is convenient and quick, and reduces the maintenance cost of the linear actuator and trapezoidal lead screw elevator.

6. Do you provide technical support for bulk orders of linear actuators? 

Yes, for bulk orders, we will send professional technicians to provide on-site installation, debugging and maintenance guidance, and provide detailed installation and maintenance manuals that comply with relevant national standards, ensuring that the Anti-Backlash Trapezoidal Nut for Linear Actuators can play the best anti-backlash and transmission performance in your linear actuators and trapezoidal lead screw elevators.