Description of precision ball screw
Mechanical specifications:
Accuracy: C5:≈0.018-0.023 mm/300 mm, C3≈0.008 mm/300 mm
Precision ball screw diameter: Ø12-80.00 mm, expandable and customizable.
Lead: 1-40.00mm, supports special lead grinding.
Nut: single nut, backlash compensation nut, preloaded double nut.
Preloading: P0, P1, P2, P3, 0-8% dynamic load preloading.
Steel: GCr15, JIS SUJ2, deep quenched to 58-62 HRC.
Thread: Fully ground machining.
Ball circulation method: internal circulation, external circulation, matched according to speed requirements.
Maximum speed: customized according to the project, up to 5-10m/s.
Maximum DN value: 130,000-160,000.
Travel: Standard 50-4,000 mm, supports lengthening and turning at both ends.
End processing: Process key slots, steps, threads, shoulders according to the drawings.
Key Performance:
Control accuracy: Johoty’s precision ball screw’s C3/C5 level lead error ensures stable repeat positioning accuracy. Grinding grade raceway + optional preloading to achieve rigidity and micro displacement control. The friction coefficient is extremely low, suitable for closed-loop servo systems. Precision ball screw is suitable for high-precision positioning, fine-tuning mechanisms, and low crawling requirements scenarios.
Dynamic performance: High DN value meets the requirements of high-speed movement, stable ball circulation design avoids high-speed noise and ball impact. Pre compression structure enhances axial rigidity and reduces vibration. Precision ball screw has significant advantages in high-speed machining centers, semiconductor equipment, and automated handling shafts.
Load capacity and durability: Johoty’s precision ball screw high hardness material + deep quenching layer enhances fatigue life. The high contact angle ball structure brings higher load-bearing capacity, while surface strengthening and grinding bring lower wear. Used for high-frequency cycling, heavy-duty shaft systems, and long-life continuous working conditions.
Applications of Johoty‘s precision ball screw
CNC machining centers/Gantry/5-axis equipment, precision measuring instruments, optical platforms. Semiconductor production equipment, robot joints/linear modules, medical equipment, laboratory automation. Automated production line high-speed shaft Pick & Place， High rigidity sliding platform system. Ultra-fine displacement adjustment and repetitive positioning machinery.
Precision ball screw compatibility:
Compatible with multiple brands of linear guides and ball screws to support mainstream brands. Johoty can process the end according to your drawing and match it perfectly with the existing bearing seat. Support matching with servo motors, servo direct connection/belt reduction/coupling.
Johoty values:
Flexible customization: C3/C5 grinding, any lead, stroke, and end processing can be achieved according to the drawings. Non-standard nuts, preloading grades, and cycling methods can be customized, supporting single piece trial production, small batch production, and mass production. Used for prototype development, niche structures, and high-end mechanical OEM.
Engineer level service: Johoty can provide complete technical parameters and assembly tolerance recommendations. Provide ball circulation speed evaluation, life calculation, and torque curve. Match system stiffness requirements, provide recommended preloading solutions, support engineering docking and quick drawing confirmation.
High end details: The precision grinding raceway can match sub-micron level tracking requirements, and the special lubrication groove structure can increase the lifespan by 12-18%. Special coating scheme (DLC/MoS2) is used for heavy industry or corrosive environments, supporting clean room level dust-free packaging. Support high-speed silent ball optimization.
Challenges and Solutions of precision ball screw
Maintain consistent lead accuracy for long stroke or large-sized precision ball screw
Challenges:
- Under lead tolerances of C5 or C3, micrometer level errors accumulate extremely sensitively on precision ball screws that are several meters long.
- Long stroke or larger diameter precision ball screws sometimes require the design of thermal deformation, splicing between grinding sections, nut preload adjustment, and ball circulation. These may result in cumulative errors or lead drift segment by segment.
- Customers have extremely high requirements for repeat positioning accuracy, motion smoothness, and lifespan stability. Any lead offset or positioning deviation may result in system feedback adjustment being too frequent, lifespan decreasing, or batch inconsistency.
Johoty Solutions:
- Johoty adopts a whole grinding, nut and ball matching calibration process. The precision lead detection system monitors the precision ball screw online from initial grinding to final testing. The lead tolerance of C5/C3 has high consistency within the maximum length range.
- Johoty implements inter segment docking compensation grinding and thermal deformation compensation for precision ball screws with a diameter of ≥1,000 mm or a large diameter. Provide a lead change curve report at the factory.
- Cumulative lead error map and nut ball preload verification for each precision ball screw. Customers can trace each batch of data, meeting the requirements of documentation and traceability.
Precision ball screw design and preload stability and lifespan under high precision:
Challenges:
- The guide groove, raceway processing, ball arrangement, and preload adjustment of precision ball screw ball nuts require high requirements. They can determine the smoothness of operation, meshing clearance, and repeatability of positioning accuracy.
- If there are machining errors in the return groove, mismatched number of ball bearings, and unstable preload settings, problems may occur at high speeds or in reverse. May cause vibration, noise, gap drift, and shortened lifespan.
- Many engineers are very concerned about the operating life multiplied by the residual value of repeated positioning accuracy. Often unable to accept drift after several thousand hours of operation despite good initial accuracy.
Johoty Solutions:
- Johoty’s self-developed multi axis grinding and raceway cutting equipment achieves a geometric accuracy of ≤0.002mm for the raceway. The internal ball return channel of the nut is strictly simulated and optimized to avoid ball bouncing or derailment.
- Set the optimal preload force range for precision ball screws with different lead lengths and diameters. Pre load curve test report is attached at the factory to ensure long-term stability of repeated positioning accuracy. Johoty provides ≥5 million cycles or ≥1,000 hours of verification, and issues a life accuracy maintenance report.
Precision ball screw batch consistency, file traceability, and standard compliance:
Challenges:
- Customers often focus on the accuracy of a single precision ball screw and pay more attention to the consistency between the entire batch and different batches.
- Customers often require material composition, heat treatment reports, surface roughness, and nut preload settings. Static/dynamic testing, lifespan testing, cleanliness, packaging conditions.
- If no quality documents, batch reports, process control records, ISO9001, IATF16949 or precision transmission requirements, clients will feel that the risk is high.
Johoty Solutions:
- Johoty has established a six key process control flow from material entry, heat treatment, grinding, assembly, testing, to factory delivery through ISO 9001. Each process has process records, critical dimension measurements, operator signatures, and equipment calibration records.
- Each precision ball screw has a batch number, serial number, lead cumulative error table, preload force test data, and hardness roughness report. Customers can report to Johoty for future maintenance or replacement when installing globally.
- Johoty provides optional third-party testing and an English QA file package for engineers and procurement organizations to quickly review in response to their needs.
Why Choose Johoty’s precision ball Screw ?
With its precision grinding process and strict quality control, Johoty can control the lead accuracy of C7/C10 bass screw within ± 0.05mm/300mm. Rigid matching is achieved through customized preloading adjustment and optimization of the circulation system.
Benefits of Johoty’s precision ball Screw
Accuracy and Repetitive Localization:
Challenges: Positioning deviations, vibrations, machining errors, and even yield fluctuations often occur in precision machining centers, measurement platforms, or automated assembly equipment. It is due to precision ball screw lead error, nut preload variation, thermal deformation, and cumulative thread error. Engineers require precision ball screw to have extremely high repeatability and stability throughout the entire stroke.
Benefits: Precision ball screw that can be ground to C5/C3, with extremely low lead error, can reduce return clearance and cumulative error. You can control this variable at a better level in the early stages of design. Johoty emphasizes the ability for customization and flexible solutions, processing based on length, lead, nut structure, and preload level. When manufacturing ball screws/drive nuts, Johoty uses SCM415 hardening treatment and nut preload ΔK≤0.005 mm to improve stability.
Delivery time and customization flexibility:
Challenges: Model changes, specification modifications, short cycle sampling, small-scale trial production, and frequent revisions are all common occurrences for customer projects. The standard precision ball screw cannot cover special lengths, nut structures, interface processing, preload requirements, and stroke matching. Therefore, engineers highly value Johoty’s advantages in customization, rapid response, and on-demand manufacturing.
Benefits: Johoty has flexible custom solutions and customized precision ball screw. Our lead screw, ACME screw, ball screw, and more are all customized for you. Engineers prefer to collaborate with Johoty, which has customized processes that can be adjusted based on lead, length, interface, preload level, and fatigue life. It can significantly reduce the trouble of not being able to find suitable standard parts and having to modify the design.
Cost performance ratio and supply chain controllability:
Challenges: In the European and American markets, precision ball screws are often expensive. Many customers need to ensure performance and control costs. We also need to consider the controllability of the supply chain, traceability of raw materials, consistency in mass production, and availability of replacement parts. I need to balance high precision of precision ball screw and reasonable cost.
Benefits: Johoty has advantages in processing, manufacturing technology, labor costs, and supply chain. We emphasize the concept of custom precision ball screw and cost… flexible. For precision ball screw, you can choose a big brand, but you will need to bear a higher premium. Johoty, which is customizable, has controllable processes, and greater price elasticity, helps you control overall costs. Johoty provides one-stop precision ball screw processing and matching. Including CNC parts, lead screw, ball screw, pogo pins, pogo pin connector. You can minimize the management of multiple suppliers.
Long term support, traceability, and technical cooperation:
Challenges: The first batch of high-end equipment needs to meet precision requirements. Consistency and traceability are required for subsequent mass production, maintenance, replacement, and upgrade. Suppliers need to have technical support, testing reports, replacement services, preloading, nut structure optimization, thermal expansion compensation capabilities, and batch consistency. Otherwise, although the initial choice is good, it will be troubled by specification drift, difficulty in replacement, and service breakage in the later stage.
Benefits: Johoty emphasizes precision ball screw manufacturing, innovation and quality, and customized R&D cooperation.
Establish customized specification files with Johoty for screw length, lead, preload, bearing combination, and end face machining. You can reprint or replace according to the same drawings/process in the future without having to search for new parts from scratch. Johoty has various precision machining capabilities and can communicate and collaborate with engineers on nut structures, support seats, end face machining, and more.
Applications of Johoty’s precision ball Screw
Precision Measurement/Coordinate Measuring Machine (CMM) Drive Shaft:
Challenges: The drive shaft of the coordinate measuring machine requires extremely high repeatability positioning accuracy, and slip, pitch error, and shaft deflection affect the measurement results.
Function: Precision ball screw precision grinding to minimize C3 lead error. It can reduce pitch errors and improve the reliability of repeated positioning of the probe.
Johoty solutions: Tailored ball screw length, lead, preload matching measuring machine platform weight, material selection of high rigidity steel.
How to solve: Perform lead screw linear calibration before installation, combine temperature compensation, and reduce the floating of the slide table structure.
Efficiency improvement/cost savings: measurement cycle shortened by 20%, calibration frequency reduced, and maintenance costs decreased.
Advantages: Johoty’s precision ball screw is suitable for low-speed high-precision applications, with long lifespan and stable accuracy.
Semiconductor wafer transfer/alignment platform:
Challenges: Chip alignment requires micrometer or even sub micrometer movement, and motion control requires extremely low hysteresis and high precision.
Function: Precision ball screws, finely ground to C5, can also be used for high-precision movement. Combining C3 level for critical axes can improve alignment accuracy.
Johoty Solutions: Provides C3 precision ball screws + low vibration nut, optimized bearings/supports, and integrated automatic lubrication solution.
How to solve: Specify minimum lead, shaft diameter matching, shorten precision ball screw effective length, and improve overall structural rigidity.
Efficiency improvement/cost savings: alignment time is reduced by about 30%, yield rate is increased by about 15%, and offline waste is reduced.
Advantages: Johoty’s precision ball screw has strong micro displacement accuracy, extremely small reverse clearance, and excellent thermal stability.
High precision CNC machine tool spindle/slide positioning system:
Challenges: Sliding table positioning error, reverse clearance, thermal expansion, low rigidity leading to repeated positioning misalignment.
Function: Precision ball screw precision grinding to 0.008 mm lead accuracy can reduce positioning errors, reduce backlash, and improve rigidity.
Johoty solutions: We will study the customized diameter/lead/preload levels for machine tool travel, load, and speed. Adopting C3 grade precision grinding ball screw, paired with high rigidity nuts.
How to solve: Replace the original standard ball screw with a customized C3 precision component, calibrate the slide support structure, and optimize temperature compensation.
Efficiency improvement/cost savings: The positioning error has been reduced from ± 0.03 mm to ± 0.005 mm, reducing rework rate by about 60% and improving the first piece pass rate.
Advantages: High precision, low wear, good repeatability, suitable for high-speed/heavy-duty sliding tables.
Large gantry machine tools for machining aviation structural components:
Challenges: Large scale structures have high processing loads, large spans, and are severely affected by inertia and thermal deformation. Traditional lead screws are difficult to guarantee rigidity and accuracy.
Function: Precision ball screws customized C5/C3 can provide stable lead, high rigidity, and suitable for heavy load and large stroke.
Johoty Plan: The diameter of the screw is too large, the lead is optimized to adapt to large strokes, lubrication and preload design are strengthened, and the structure is resistant to thermal deformation.
How to solve: Replace with large-diameter customized precision ball screw, enhance support system, optimize lubrication and temperature control.
Efficiency improvement/cost savings: The processing cycle is shortened by about 25%, the workpiece qualification rate is increased by about 10%, and repairs are reduced.
Advantages: Johoty’s precision ball screw has strong load-bearing capacity, maintains accuracy in large strokes, and can be customized in design.
Medical imaging equipment CT/MRI track drive:
Challenges: The device drive axis needs to be silent, highly smooth, vibration free, and accurately positioned to ensure image quality.
Function: Precision ball screw grinding can reduce friction, backlash, and vibration. Improve smoothness and positional repeatability.
Johoty solutions: C5 precision ball screws, optimized ball return trajectory, use of low-noise nuts, surface treatment to improve lifespan.
How to solve: Replace the old screw, synchronously optimize the response of the drive motor, and strengthen the rigidity control of the installation base.
Efficiency improvement/cost savings: Maintenance downtime is reduced by 40%, and the average equipment failure rate is lowered.
Advantages: High precision+low vibration+low noise, Johoty’s precision ball screw is suitable for harsh environments of medical equipment.
Robot/Automated Assembly Line Propeller:
Challenges: High tempo, high repetition, variable load environment, common positioning errors, short screw life, and delayed response.
Function: Precision ball screw grinding to C3/C5 can reduce positioning errors, improve response speed and lifespan.
Johoty solutions: Johoty will customize the screw diameter and lead according to the stroke speed, preload level, and enhance lubrication and dust prevention design.
How to solve: Use customized precision ball screws, optimized controller positioning instructions and feedback in robot thrusters.
Efficiency improvement/cost savings: Robot and automated assembly yield increased by about 18%, maintenance cycle extended by about 30%.
Advantages: Johoty’s precision ball screw is suitable for high-speed operation, large-scale repetition, and high reliability applications.
Precision lens grinding/polishing platform:
Challenges: Lens grinding/polishing requires extremely high precision for platform translation/rotation, and any screw pitch error can lead to optical defects.
Function: Precision ball screws C3 accuracy can reduce the platform’s linear displacement error to the micrometer level, ensuring optical results.
Johoty solutions: customized ultra-fine lead precision ball screw, matched with high rigidity nuts, low heat generation treatment, lubrication optimization.
How to solve: Install high precision ball screws, perform thermal expansion compensation on the platform, and provide closed-loop position feedback.
Efficiency improvement/cost savings: The defect rate has been reduced by about 22%, and the processing cycle has been shortened by~15%.
Advantages: In optical grade processing, Johoty’s precision ball screw micro displacement control is excellent and thermal deformation is low.
New energy wind blade root detection platform/solar tracking system:
Challenges: The large-scale structural inspection/tracking system requires long travel, high load, large outdoor temperature changes, and poor weather resistance of the screw.
Function: Precision ball screw customized C5 level can provide long stroke high rigidity, and the accuracy can smoothly pass structural inspection.
Johoty solutions: customized large-diameter ball screws, anti-corrosion treatment, temperature compensation design, and preload optimization for outdoor structures.
How to solve: Replace the universal screw with a customized precision ball screws, install temperature monitoring and lubrication maintenance system.
Efficiency improvement/cost savings: reduced downtime by >35%, maintenance costs by >20%.
Advantages: Johoty’s precision ball screw is suitable for precise positioning in large stroke, high load, and harsh environments.
Advantages of Johoty’s precision ball screw
Precision ball screw with extremely high lead accuracy:
Advantages:
Johoty’s customized precision ball screw C5 provides users with extremely precise lead control. Reduce positioning errors and backlash in high repeatability and positioning accuracy applications. For CNC machine tools and measurement systems, precise lead control ensures the stability and high reliability of the mechanical system. Avoid component damage and performance degradation caused by precision errors.
Problem solving:
- CNC machine tool and slide positioning accuracy: Under high loads, the reverse clearance and lead error between the slide and spindle can lead to inaccurate repeated positioning. The Johoty C5/C3 precision ball screw can effectively ensure long-term stable high-precision positioning.
- Semiconductor industry: wafer alignment and translation operation equipment, precise lead control can reduce image errors and repetitive positioning problems, and improve production efficiency.
Precision ball screw with low wear and long lifespan:
Advantages:
Johoty’s precision ball screw has extremely low wear between the screw and nut, effectively extending its service life. In high-speed and high load applications, low wear can reduce replacement and maintenance, and lower total cost of ownership.
Problem solving:
- High load and heavy-duty applications: In large machine tools and automated assembly lines, prolonged and high-frequency use can lead to screw wear. The low wear of Johoty’s precision ball screw can maintain the long-term accuracy of the system. High precision transmission system:
- When using traditional lead screws, the loss of accuracy due to wear will increase the equipment failure rate. Johoty’s precision ball screw can maintain long-term stability and reduce the overall maintenance frequency of the equipment.
Error caused by low temperature changes in Johoty’s precision ball screw:
Advantages:
The precision ball screw’s lead accuracy and material design optimization can reduce thermal expansion errors caused by temperature changes. High stability precision equipment is required to avoid accuracy fluctuations caused by temperature differences when used in harsh environments.
Problems solving:
- Medical equipment and precision measurement systems: Temperature fluctuations have a significant impact on precision measurement systems. In larger devices, temperature changes can cause thermal expansion of the shaft, which can affect measurement accuracy. Johoty’s precision ball screws adopt temperature compensation design to minimize errors from unstable temperature.
- Aviation and automotive manufacturing: In the processing of aviation or high-precision automotive parts, the temperature changes in the environment in which the system is located are significant. Johoty’s precision ball screws can reduce the impact of thermal expansion and ensure stable machining accuracy.
Johoty custom designs precision ball screw to meet specific needs:
Advantages:
Johoty can flexibly customize the size, lead, preload, etc. of the screw to meet various needs in complex engineering. Johoty’s customized precision ball screw provides customized solutions to address specific challenges in terms of load, travel, and environment.
Problems solving:
- Automated production lines and robot systems: These systems often need to cope with large-scale load changes, long work cycles, and high-frequency operations.
- Johoty can adjust the lead, preload, and ball screw rigidity according to actual needs. Your precision transmission system will be more efficient and stable.
- Large stroke machine tools and gantry equipment: Long stroke and high load equipment require higher precision transmission. The customized screw provided by Johoty can meet the needs of large stroke and large load while ensuring accuracy.
FAQ
Engineer’s challenges:
After long-term operation, the screw is prone to accumulated errors, thermal drift, changes in backlash caused by wear, and local thread fatigue caused by load concentration. However, laser cutting, semiconductor handling, and precision measurement platforms cannot accept this change.
Johoty’s solutions:
Equal pitch ground raceway: Ensure uniform force distribution, reduce pitting and local stress concentration on the ball bearings, and maintain stable accuracy.
C3/C5 true lead accuracy: C5: 0.018-0.023 mm/300 mm, C3:≈0.008 mm/300 mm. Johoty supports providing full-length test curves for engineers to perform error compensation.
Pre compression controllable: Engineers can achieve optimal configuration between high stiffness, low friction, and low return error.
Engineer benefit: Johoty’s precision ball screw ensures micrometer level positioning stability during long-term operation. Avoid repeated calibration and shutdown caused by thermal drift or wear.
Engineer’s Challenges:
Under the high-speed automation of picking and placing, PCB mounting machines, electronic dispensing platforms, and laboratory automation, ordinary structures are difficult to avoid:
- Resonance caused by approaching critical speed.
- Noise generated by high-speed rolling.
- Lubrication film rupture caused by high-speed rotation.
- The large aspect ratio of the screw leads to bending vibration.
Johoty’s solutions:
- C3/C5 precision grinding raceway + automated low eccentricity spindle processing, suppressing radial runout during high-speed operation.
- Customizable precision ball screw stiffness (material, diameter, support method). Optional: fixed-fixed, fixed-support, support-support, to increase critical speed margin.
- High speed lubrication grooves and internal oil film retention structure of nuts reduce the risk of oil film rupture and dry friction under high-speed shear.
Engineer benefits: stable high-speed operation, low vibration, no interference with the visual system, and no repeated displacement at the load end.
Engineer’s Challenges:
High end equipment often operates in environments that are not laboratory settings. It is often necessary to work stably in automated production lines with dust, light corrosive cleaning solutions, micro particles, high humidity, and temperature differences. Under these conditions, ordinary lead screws are prone to rolling path pitting, oil film damage, micro particles entering the ball circulation system, and nut blockage.
Johoty’s solutions:
- C3/C5 precision ball screw can choose anti-corrosion materials and surface treatments: blackening, hard chromium, nickel phosphorus (chemical plating), stainless steel (specific models).
- Double sealing + dust isolation structure reduces the risk of particles entering.
- Optional fully enclosed lubrication circulation system, suitable for frequent flushing and micro corrosion applications.
- Johoty provides an environment factor design guide to facilitate engineers in matching the optimal precision ball screw with real working conditions.
Engineer benefits: Maintaining smooth precision ball screw cycle, no attenuation of preload, and minimizing raceway pitting in non-ideal environments. Engineer can extend precision ball screw life cycles smoothly.
