Description

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Product Parameters

Key performance parameters

Rated dynamic load (Ca): the life load under dynamic conditions, such as more than 100kN.
Static load rating (Coa): Static limit load to prevent permanent deformation.
Rigidity: usually ≥ 500 N/μm, high rigidity design can reduce elastic deformation.
Accuracy grade: C3 ~ C5 (ISO standard), precision grinding process to ensure repeated positioning accuracy.

Product Features and Applications

Basic dimensional parameters

Nominal diameter: Common specifications include 12mm, 16mm, 20mm, 25mm, 32mm, 40mm, 50mm, 63mm, 80mm, 100mm, 120mm, etc. The nominal diameter is basically proportional to the load capacity, and the larger the diameter, the stronger the load capacity.

Lead: Common leads include 1mm, 2mm, 4mm, 5mm, 6mm, 8mm, 10mm, 16mm, 20mm, 25mm, 32mm, 40mm, etc. At a constant input speed, the larger the lead, the faster the linear motion speed of the nut.

Length: It includes two concepts: total length and thread length. Total length is the total length of the screw, and thread length is divided into total thread length and effective stroke. When designing, factors such as effective stroke, nut length, design margin, support length at both ends, and power input connection length need to be comprehensively considered.

Load capacity parameters

Rated dynamic load (Ca): refers to the rated axial load that the ball screw can withstand in motion.

Rated static load (C0a): refers to the rated axial load that the ball screw can withstand in a stationary state.

Accuracy and motion characteristic parameters

Accuracy level: According to GB classification, there are P and T categories, namely transmission and positioning categories, with accuracy levels of 1, 2, 3, 4, etc; Foreign products are generally represented by C0~C10 or specific numerical values, such as C7, C5, C3, etc.

Lead accuracy: including running distance error and lead accuracy variation. For example, the lead accuracy of a certain model represents a running distance error ep of 0.054mm and a lead accuracy variation vu of 0.035mm. These parameters directly affect the positioning accuracy and repeatability accuracy of the equipment.

Axial clearance: refers to the axial displacement between the nut and the screw when the ball screw is not under load, generally controlled within a small range, such as 0.01mm or less, to ensure transmission accuracy and stability.

Axis runout: reflects the radial runout of the axis when the screw rotates. For example, if the axis runout of a certain model is 0.085mm, this indicator affects the smoothness and accuracy of the transmission.

Environmental adaptability parameters

Operating temperature: Different types of ball screws have different operating temperature ranges, with a maximum operating temperature of up to 70 ℃ (nut outer diameter temperature). The appropriate product should be selected according to the actual working environment.

Protection level: Some high load ball screws have certain protective performance, such as using profile sealing technology, which increases the grease locking ability by 60% compared to conventional products, effectively preventing dust, chips and other impurities from entering and extending the service life.

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Product Features And Applications

1. Product features

Ultra high load capacity: Designed with special internal specifications for high load applications, the rated load is significantly increased compared to standard products, meeting the driving requirements under high load conditions.

Excellent durability: Improve the uniform design of the load distribution inside the nut by optimizing the steel ball circulation arrangement, making the distribution of steel balls inside the nut close to symmetry and achieving uniform load distribution. At the same time, under high load conditions, by balancing the stiffness of the screw shaft and nut, and applying the load points to the opposite sides, the uniformity of load distribution is further ensured. In addition, the use of high load lubricating grease significantly improves the durability of ball screws.

High speed response capability: It has good high-speed performance and can meet some high load application scenarios that require speed. For example, NSK's HTF series ball screws have a DM · N value of up to 70000.

High precision and high rigidity: Through precision manufacturing and quality control, the ball screw is ensured to have high precision and high rigidity, meeting the requirements of high-precision mechanical transmission.

Rich series combinations: There are various combinations of shaft diameter and lead, with a wide range of shaft diameters and diverse lead ranges, and a variety of standard specifications. At the same time, precision levels such as C5 and C7 are available for selection, which can correspond to various shaft end shapes required for high friction torque transmission.

High adaptability: It can correspond to various shaft end shapes required for high friction torque transmission, such as keyway, angular spline, complex spline, spur gear, etc., making it convenient for users to choose according to specific needs.

2. Application Fields

Electric injection molding machine and injection molding machine: used for the injection shaft, mold clamping shaft, and mold clamping parts of electric injection molding machines, to withstand high loads and achieve high-precision linear motion transmission.

Large manufacturing equipment: Large equipment used in industrial manufacturing, such as machine tools, water cutting machines, plasma cutting machines, and automatic welding machines, typically require accurate and safe horizontal and vertical axis movement of large loads through ball screws. High load ball screws can ensure long-term reliability and minimal maintenance. For example, assuming a large equipment operates with a load of 100kN for 24 hours/7 days, according to fatigue failure analysis and statistical life calculation, the ball screw used in the application can be used for 3-4 months. Using high load ball screws will double the load capacity and extend the service life by 8 times.

Industrial automation equipment: commonly used as transmission devices for various robotic arms, handling equipment, etc. on automated production lines. Through the transmission of ball screws, high-speed and precise motion control of automated equipment can be achieved, thereby improving production efficiency and product quality.

Medical equipment: Transmission devices commonly used in surgical robots, imaging equipment, etc., to meet the requirements of high precision and high stability in the medical field.

Aerospace and Military Industry: In high-precision and high load transmission systems such as missile launchers and aircraft landing gear, high load ball screws play an important role in ensuring the reliability and safety of equipment.

Product Design

1. Core parameters

Load bearing capacity: The rated load of high load ball screws is significantly increased compared to standard products, making them suitable for high load scenarios.
Accuracy level: Supports accuracy levels such as C3, C5, C7 (JIS standard) to meet the positioning accuracy requirements of different applications.
Lead and speed: The lead range is usually 10-70mm, and the DM · N value (steel ball pitch diameter x speed) can reach up to 70000rpm · mm, balancing high load and high-speed requirements.

2. Design of key components

Threaded shaft: groove design: adopting a high load-bearing groove type, optimizing the contact surface between the ball and the raceway, and improving the axial bearing capacity.
Materials and Heat Treatment: Alloy tool steel or bearing steel (such as GCr15) is often used to improve surface hardness (HRC58-62) and wear resistance through processes such as induction hardening and nit-riding.
Nut: Circulation system: designed with internal or external circulation to ensure smooth circulation of the ball in the raceway and reduce wear.
Preloading technology: By preloading, axial clearance is eliminated, rigidity is improved, and elastic deformation under load is reduced.
Ball bearing: Material: Made of high hardness chromium steel to ensure long-term fatigue resistance under high loads.
Retainer: The entire series uses ball retainers to avoid direct contact between ball bearings, reduce noise and wear.

3. Materials and processes

High strength alloy steel: suitable for high load and high-speed scenarios, providing excellent strength and rigidity.
Stainless steel: suitable for corrosive environments such as food processing or chemical equipment.
Precision machining: divided into two parts: thread machining and heat treatment.
Thread processing: Using precision grinding or rolling technology to ensure thread accuracy and surface quality.
Heat treatment: By quenching, tempering, nit-riding and other processes, material properties are improved and service life is extended.

4. Sealing and lubrication

Imitation sealing: The grease locking ability is increased by 60% compared to conventional products, effectively preventing external pollutants from entering and extending the service life of lubricating grease.
High load lubricating grease: Select high-temperature and high-pressure resistant specialized lubricating grease to reduce friction and wear, and improve durability.

5. Special design

Integrated structure: Adopting an integrated design of "ball screw+ball spline+ball bearing", it achieves composite motion of movement, rotation, and spiral motion, with a fast moving speed of up to 2.3m/s.
Long life design: By optimizing the shape of the raceway, increasing material hardness, improving sealing and lubrication, the service life is significantly extended.
Personalized customization: Supports customization of large diameter and long size nuts to meet special application needs.

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Product Evidence

Testing and Verification

Professional testing: Professional testing will conduct strict performance tests on high load ball screws, including lead accuracy, axial clearance, material hardness, surface treatment quality, etc.

Practical application verification: In practical applications, the performance of high load ball screws has been recognized by customers, such as excellent performance in fully electric injection molding machines, stamping machines and other equipment.

If you need more detailed product certification documents or customer cases, we suggest contacting DLY directly for further information.

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Thoughtful Service, Worry Free After-sales Service

1. Thoughtful service

Professional selection and technical support

Customized services

2. Worry free after-sales service

A comprehensive after-sales system

Product Guarantee

quick response

By choosing DLY high load ball screws and related services, customers can enjoy comprehensive protection from selection, technical support to after-sales maintenance, truly achieving worry free after-sales service.