Product Description
The trapezoidal metric thread form is similar to the CHINAMFG thread form, except the thread angle is 30°.It is codified by DIN 103. While metric screw threads are more prevalent CHINAMFG than imperial threads for triangular thread forms, the imperially sized Acme threads predominate in the trapezoidal thread form.
The advantages of a leadscrew are:
- Large load carrying capability
- Compact
- Simple to design
- Easy to manufacture; no specialized machinery is required
- Large mechanical advantage
- Precise and accurate linear motion
- Smooth, quiet, and low maintenance
- Minimal number of parts
- Most are self-locking
| Nominal diameter D (mm) |
Pitch P (mm) |
Nominal diameter D (mm) |
Pitch P (mm) |
||||
|---|---|---|---|---|---|---|---|
| 1st choice |
2nd choice |
Coarse | Fine | 1st choice |
2nd choice |
Coarse | Fine |
| 1 | 0.25 | 0.2 | 16 | 2 | 1.5 | ||
| 1.2 | 0.25 | 0.2 | 18 | 2.5 | 2 or 1.5 | ||
| 1.4 | 0.3 | 0.2 | 20 | 2.5 | 2 or 1.5 | ||
| 1.6 | 0.35 | 0.2 | 22 | 2.5 | 2 or 1.5 | ||
| 1.8 | 0.35 | 0.2 | 24 | 3 | 2 | ||
| 2 | 0.4 | 0.25 | 27 | 3 | 2 | ||
| 2.5 | 0.45 | 0.35 | 30 | 3.5 | 2 | ||
| 3 | 0.5 | 0.35 | 33 | 3.5 | 2 | ||
| 3.5 | 0.6 | 0.35 | 36 | 4 | 3 | ||
| 4 | 0.7 | 0.5 | 39 | 4 | 3 | ||
| 5 | 0.8 | 0.5 | 42 | 4.5 | 3 | ||
| 6 | 1 | 0.75 | 45 | 4.5 | 3 | ||
| 7 | 1 | 0.75 | 48 | 5 | 3 | ||
| 8 | 1.25 | 1 or 0.75 | 52 | 5 | 4 | ||
| 10 | 1.5 | 1.25 or 1 | 56 | 5.5 | 4 | ||
| 12 | 1.75 | 1.5 or 1.25 | 60 | 5.5 | 4 | ||
| 14 | 2 | 1.5 | 64 | 6 | 4 |
| Nominal diameter D (mm) |
Pitch P (mm) |
Nominal diameter D (mm) |
Pitch P (mm) |
||||
|---|---|---|---|---|---|---|---|
| 1st choice |
2nd choice |
Coarse | Fine | 1st choice |
2nd choice |
Coarse | Fine |
| 1 | 0.25 | 0.2 | 16 | 2 | 1.5 | ||
| 1.2 | 0.25 | 0.2 | 18 | 2.5 | 2 or 1.5 | ||
| 1.4 | 0.3 | 0.2 | 20 | 2.5 | 2 or 1.5 | ||
| 1.6 | 0.35 | 0.2 | 22 | 2.5 | 2 or 1.5 | ||
| 1.8 | 0.35 | 0.2 | 24 | 3 | 2 | ||
| 2 | 0.4 | 0.25 | 27 | 3 | 2 | ||
| 2.5 | 0.45 | 0.35 | 30 | 3.5 | 2 | ||
| 3 | 0.5 | 0.35 | 33 | 3.5 | 2 | ||
| 3.5 | 0.6 | 0.35 | 36 | 4 | 3 | ||
| 4 | 0.7 | 0.5 | 39 | 4 | 3 | ||
| 5 | 0.8 | 0.5 | 42 | 4.5 | 3 | ||
| 6 | 1 | 0.75 | 45 | 4.5 | 3 | ||
| 7 | 1 | 0.75 | 48 | 5 | 3 | ||
| 8 | 1.25 | 1 or 0.75 | 52 | 5 | 4 | ||
| 10 | 1.5 | 1.25 or 1 | 56 | 5.5 | 4 | ||
| 12 | 1.75 | 1.5 or 1.25 | 60 | 5.5 | 4 | ||
| 14 | 2 | 1.5 | 64 | 6 | 4 |
| Material combination | Starting {\displaystyle \mu _{c}} | Running {\displaystyle \mu _{c}} |
|---|---|---|
| Soft steel / cast iron | 0.17 | 0.12 |
| Hardened steel / cast iron | 0.15 | 0.09 |
| Soft steel / bronze | 0.10 | 0.08 |
| Hardened steel / bronze | 0.08 | 0.06 |
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| Condition: | New |
|---|---|
| Certification: | CE, RoHS, GS, ISO9001 |
| Standard: | DIN, ASTM, GOST, GB, JIS, ANSI, BS |
| Customized: | Customized |
| Material: | Alloy |
| Application: | Metal Recycling Machine, Metal Cutting Machine, Metal Straightening Machinery, Metal Spinning Machinery, Metal Processing Machinery Parts, Metal forging Machinery, Metal Engraving Machinery, Metal Drawing Machinery, Metal Coating Machinery, Metal Casting Machinery |
| Samples: |
US$ 0/Piece
1 Piece(Min.Order) | |
|---|
| Customization: |
Available
|
|
|---|
Can lead screws be customized for specific industries or machinery configurations?
Yes, lead screws can be customized to meet the specific requirements of different industries or machinery configurations. Customization allows for the adaptation of lead screws to unique applications, ensuring optimal performance and compatibility. Here’s how lead screws can be customized:
Thread Design:
The thread design of lead screws can be customized to suit specific applications. The thread profile, such as Acme, square, or buttress, can be selected based on factors such as load capacity, efficiency, backlash, and self-locking characteristics. The thread pitch can be adjusted to achieve the desired linear travel per revolution, allowing for different positioning resolutions. Custom thread designs can also be implemented to address specific requirements or constraints of the machinery configuration.
Materials and Coatings:
The choice of materials for lead screws can be customized based on the application’s environmental conditions and performance requirements. Different materials, such as stainless steel, carbon steel, or alloys, can be selected for their mechanical properties, corrosion resistance, or temperature resistance. Additionally, lead screws can be coated or treated with specialized coatings, such as Teflon or ceramic coatings, to reduce friction, improve wear resistance, or enhance lubrication properties.
Size and Dimensions:
The size and dimensions of lead screws can be customized to fit specific machinery configurations or space constraints. This includes variations in length, diameter, and thread length to ensure proper fit and integration within the machinery or system. Customization of lead screw dimensions allows for efficient utilization of available space and compatibility with existing components or mounting mechanisms.
End Machining:
Lead screws can be customized with different types of end machining to facilitate their connection to other components or power sources. This may involve the addition of keyways, flats, or other features to enable coupling with drive mechanisms, such as motors or handwheels. Customized end machining ensures proper alignment, torque transmission, and ease of installation within the specific machinery configuration.
Accessories and Attachments:
Customization of lead screws can also involve the addition of accessories or attachments to enhance their functionality or compatibility with specific industries or machinery configurations. This may include the inclusion of anti-backlash nuts, thrust bearings, lubrication systems, or wipers. These accessories and attachments can improve precision, reduce wear, increase load capacity, or address specific application requirements.
By offering customization options, lead screw manufacturers can cater to the diverse needs of different industries and machinery configurations. Customized lead screws ensure that the linear motion system is optimized for performance, efficiency, and compatibility, resulting in improved overall functionality and reliability.
How does the choice of lead screws affect the overall performance and reliability of linear motion systems?
The choice of lead screws has a significant impact on the overall performance and reliability of linear motion systems. Different types of lead screws offer distinct characteristics and capabilities that influence factors such as accuracy, load capacity, speed, efficiency, backlash, and durability. Here are some key ways in which the choice of lead screws affects the performance and reliability of linear motion systems:
- Accuracy and Precision: The selection of an appropriate lead screw type can directly impact the accuracy and precision of linear motion systems. Lead screws with fine thread pitches or multiple starts provide higher resolution and finer positioning capabilities, resulting in improved accuracy. Choosing a lead screw with low backlash and minimal axial play helps maintain precise motion control and repeatability.
- Load Capacity: Different lead screw designs have varying load-carrying capacities. Factors such as the diameter, pitch, material, and thread type influence the ability of a lead screw to handle axial loads. Selecting a lead screw with sufficient load capacity ensures the system can handle the required loads without compromising performance or risking premature failure.
- Speed and Efficiency: Lead screw selection affects the speed and efficiency of linear motion systems. Coarser thread pitches enable faster linear speeds, making them suitable for applications that require rapid movement. However, finer thread pitches offer increased mechanical advantage and torque conversion efficiency, making them preferable for systems requiring higher force output.
- Backlash and Repeatability: Backlash, the clearance between the lead screw and nut, can impact the accuracy and repeatability of linear motion systems. The choice of lead screw influences the amount of backlash present. Lead screws with low backlash or anti-backlash mechanisms minimize positioning errors and ensure consistent repeatability, enhancing system performance and reliability.
- Lubrication and Maintenance: Different lead screw materials and designs require specific lubrication and maintenance practices to ensure optimal performance and longevity. Some lead screws may require periodic lubrication, while others may be self-lubricating or require minimal maintenance. Choosing a lead screw that aligns with the maintenance capabilities and requirements of the system simplifies upkeep and reduces the risk of premature wear or failure.
- Environmental Considerations: The choice of lead screws should also take into account the environmental conditions in which the linear motion system will operate. Factors such as temperature, humidity, exposure to contaminants, or corrosive agents can impact the performance and reliability of lead screws. Selecting lead screws with appropriate materials, surface treatments, or protective coatings ensures compatibility with the intended operating environment.
It is crucial to carefully assess the specific requirements of the linear motion system and consider factors such as load capacity, accuracy, speed, backlash, maintenance, and environmental conditions when choosing a lead screw. Consulting with manufacturers, engineers, or industry experts can provide valuable insights and guidance to select the most suitable lead screw for achieving optimal performance, reliability, and longevity in a given application.
Can you explain the role of a lead screw in converting rotary motion to linear motion?
A lead screw plays a crucial role in converting rotary motion into linear motion in mechanical systems. It achieves this by utilizing the helical threads on the screw and the corresponding threads on the nut. Here’s a detailed explanation of how a lead screw accomplishes the conversion:
- Helical Thread Design: A lead screw is designed with a helical thread that wraps around its cylindrical shaft. The thread is typically a continuous spiral groove with a specific pitch, which is the distance between adjacent threads. The pitch determines the linear distance the nut will travel when the lead screw makes one complete revolution.
- Matching Threaded Nut: The lead screw is paired with a nut that has threads matching those on the screw. The nut is typically fixed in place while the lead screw rotates. The nut contains internal threads that engage with the external threads of the lead screw.
- Rotary Motion: When the lead screw is rotated, either manually or by a motor-driven mechanism, the helical threads on the screw cause the nut to move linearly along the length of the screw. The direction and magnitude of the linear motion depend on the direction and speed of the screw’s rotation.
- Linear Motion: As the lead screw rotates, the engaged threads between the screw and the nut create a force that translates the rotational motion into linear motion. The helical threads on the screw push against the matching threads in the nut, causing the nut to move along the length of the screw. This results in linear displacement of the nut and any attached components.
- Precision and Control: The pitch of the lead screw determines the linear distance traveled by the nut for each revolution of the screw. By controlling the rotational motion of the lead screw, precise and controlled linear movement can be achieved. This makes lead screws suitable for applications that require accurate positioning or adjustment of components.
- Load Capacity: Lead screws can handle both axial loads (tension or compression forces) and torque. The helical threads distribute the load over a larger surface area, allowing the lead screw to support and transfer significant loads. By incorporating thrust bearings or other supporting elements, the lead screw can handle high loads while maintaining smooth and controlled linear motion.
Overall, the lead screw’s role in converting rotary motion to linear motion relies on the interaction between the helical threads of the lead screw and the matching threads of the nut. This mechanism provides a reliable and precise means to translate rotational motion into linear displacement, making lead screws a valuable component in various mechanical systems and applications.
editor by CX 2024-01-24