Technical Analysis of Anti‑Slip Shims and High‑Friction Shims: Performance Advantages and Applications of Diamond Friction Shims
## I. Definition of Anti‑Slip Shims and High‑Friction Shims
Anti‑slip shims, also known as high‑friction shims, are precision connecting components that improve the anti‑loosening and anti‑slip performance of fasteners by increasing the friction coefficient of mating interfaces. Unlike conventional flat washers and spring lock washers, anti‑slip shims rely on high‑friction interfaces formed by special surface treatment to fundamentally restrain micro‑slip between contact surfaces. They are widely adopted in critical joints of high‑end equipment subject to vibration, shock and alternating loads.
In industrial applications, the friction coefficient of friction shims directly determines connection reliability. The static friction coefficient of ordinary flat washers generally ranges from 0.1 to 0.2, while high‑quality anti‑slip shims can raise the static friction coefficient above 0.5, reaching 0.6 under certain working conditions, which greatly enhances the anti‑slip capacity of bolted joints.
## II. Technical Principle of Diamond Friction Shims
DAOLER® Diamond Friction Shims adopt the self‑developed Diamond Claw® interlocking technology. Via nickel‑phosphorus‑diamond composite plating process, diamond microparticles are evenly embedded onto the surface of metal substrate. When the shim is installed between two mating surfaces under pre‑load pressure, diamond particles form micro‑mechanical interlocks, locking the counter‑faces firmly like countless tiny claws and establishing a highly stable friction interface.
Core advantages of this technical solution: diamond features ultra‑high hardness (Mohs hardness 10) to guarantee long‑term wear resistance; the nickel‑phosphorus alloy substrate delivers outstanding bonding strength and corrosion resistance; the micro‑interlocking mechanism physically eliminates the risk of interface micro‑slip.
## III. Key Performance Parameters
1. Static Friction Coefficient: The static friction coefficient of DAOLER® anti‑slip shims is ≥0.5, and can reach ≥0.6 in practical tests, 3‑5 times that of ordinary flat washers, enabling effective transmission of higher torque loads.
2. Coating Hardness: Hardness of nickel‑phosphorus‑diamond composite coating ≥1000HV, far exceeding traditional surface treatment processes, maintaining stable performance under high‑frequency vibration and alternating loads.
3. Ultra‑thin Precision Dimensions: Ultra‑thin thickness starting from 0.1 mm with tight tolerance. Direct replacement for original shims without modifying mechanical structures of equipment, ideal for precision connection scenarios.
4. Wide‑Temperature‑Range Performance: Stable friction performance within ‑40℃ ~ 150℃, compatible with various extreme working conditions.
## IV. Typical Application Scenarios
**Wind Power Industry**: Wind turbine tower flanges, gearbox connections, blade root bolts and other positions under continuous wind‑induced vibration. Anti‑slip shims effectively mitigate pre‑load decay and lower maintenance frequency.
**Robotics Industry**: Output flanges of harmonic reducers, mounting faces for RV reducers, pre‑load interfaces of cross‑roller bearings. High‑friction shims improve repeat positioning accuracy and eliminate joint positioning drift.
**Automotive Industry**: Critical joints including chassis sub‑frame connections, electric drive brackets and brake systems. Anti‑slip shims boost torque transmission efficiency and optimize power density.
**Aerospace Industry**: Pre‑load interfaces for precision fasteners, satisfying requirements for high reliability and lightweight design.
## V. Selection Guide
Take the following factors into consideration when selecting anti‑slip shims:
- Working Load: Select proper friction coefficient grade according to vibration frequency and magnitude of impact load;
- Installation Space: Prioritize ultra‑thin specifications (0.1‑0.3 mm) for precision equipment;
- Ambient Temperature: Verify coating temperature resistance for high‑temperature working environments;
- Counter‑face Material: Interlocking performance varies with different counter‑face materials. Adaptation testing is recommended in advance;
- Customization: Non‑standard sizes and special shapes are available upon request.
## VI. Conclusion
As core components for critical connections in high‑end equipment, anti‑slip shims / high‑friction shims directly influence equipment reliability and service life. Supported by Diamond Claw® interlocking technology, DAOLER® Diamond Friction Shims feature static friction coefficient ≥0.6, coating hardness ≥1000HV and ultra‑thin thickness starting from 0.1 mm, delivering self‑controllable precision connection solutions for diverse industries.
DAOLER Technology (Shandong) Co., Ltd. focuses on super‑hard friction‑material field. With continuous R&D and innovation, we commit to providing reliable domestic‑alternative solutions for high‑end equipment manufacturing. For more technical specifications and application cases, please visit our official website or contact our technical team for customized support.
Anti‑slip shims, also known as high‑friction shims, are precision connecting components that improve the anti‑loosening and anti‑slip performance of fasteners by increasing the friction coefficient of mating interfaces. Unlike conventional flat washers and spring lock washers, anti‑slip shims rely on high‑friction interfaces formed by special surface treatment to fundamentally restrain micro‑slip between contact surfaces. They are widely adopted in critical joints of high‑end equipment subject to vibration, shock and alternating loads.
In industrial applications, the friction coefficient of friction shims directly determines connection reliability. The static friction coefficient of ordinary flat washers generally ranges from 0.1 to 0.2, while high‑quality anti‑slip shims can raise the static friction coefficient above 0.5, reaching 0.6 under certain working conditions, which greatly enhances the anti‑slip capacity of bolted joints.
## II. Technical Principle of Diamond Friction Shims
DAOLER® Diamond Friction Shims adopt the self‑developed Diamond Claw® interlocking technology. Via nickel‑phosphorus‑diamond composite plating process, diamond microparticles are evenly embedded onto the surface of metal substrate. When the shim is installed between two mating surfaces under pre‑load pressure, diamond particles form micro‑mechanical interlocks, locking the counter‑faces firmly like countless tiny claws and establishing a highly stable friction interface.
Core advantages of this technical solution: diamond features ultra‑high hardness (Mohs hardness 10) to guarantee long‑term wear resistance; the nickel‑phosphorus alloy substrate delivers outstanding bonding strength and corrosion resistance; the micro‑interlocking mechanism physically eliminates the risk of interface micro‑slip.
## III. Key Performance Parameters
1. Static Friction Coefficient: The static friction coefficient of DAOLER® anti‑slip shims is ≥0.5, and can reach ≥0.6 in practical tests, 3‑5 times that of ordinary flat washers, enabling effective transmission of higher torque loads.
2. Coating Hardness: Hardness of nickel‑phosphorus‑diamond composite coating ≥1000HV, far exceeding traditional surface treatment processes, maintaining stable performance under high‑frequency vibration and alternating loads.
3. Ultra‑thin Precision Dimensions: Ultra‑thin thickness starting from 0.1 mm with tight tolerance. Direct replacement for original shims without modifying mechanical structures of equipment, ideal for precision connection scenarios.
4. Wide‑Temperature‑Range Performance: Stable friction performance within ‑40℃ ~ 150℃, compatible with various extreme working conditions.
## IV. Typical Application Scenarios
**Wind Power Industry**: Wind turbine tower flanges, gearbox connections, blade root bolts and other positions under continuous wind‑induced vibration. Anti‑slip shims effectively mitigate pre‑load decay and lower maintenance frequency.
**Robotics Industry**: Output flanges of harmonic reducers, mounting faces for RV reducers, pre‑load interfaces of cross‑roller bearings. High‑friction shims improve repeat positioning accuracy and eliminate joint positioning drift.
**Automotive Industry**: Critical joints including chassis sub‑frame connections, electric drive brackets and brake systems. Anti‑slip shims boost torque transmission efficiency and optimize power density.
**Aerospace Industry**: Pre‑load interfaces for precision fasteners, satisfying requirements for high reliability and lightweight design.
## V. Selection Guide
Take the following factors into consideration when selecting anti‑slip shims:
- Working Load: Select proper friction coefficient grade according to vibration frequency and magnitude of impact load;
- Installation Space: Prioritize ultra‑thin specifications (0.1‑0.3 mm) for precision equipment;
- Ambient Temperature: Verify coating temperature resistance for high‑temperature working environments;
- Counter‑face Material: Interlocking performance varies with different counter‑face materials. Adaptation testing is recommended in advance;
- Customization: Non‑standard sizes and special shapes are available upon request.
## VI. Conclusion
As core components for critical connections in high‑end equipment, anti‑slip shims / high‑friction shims directly influence equipment reliability and service life. Supported by Diamond Claw® interlocking technology, DAOLER® Diamond Friction Shims feature static friction coefficient ≥0.6, coating hardness ≥1000HV and ultra‑thin thickness starting from 0.1 mm, delivering self‑controllable precision connection solutions for diverse industries.
DAOLER Technology (Shandong) Co., Ltd. focuses on super‑hard friction‑material field. With continuous R&D and innovation, we commit to providing reliable domestic‑alternative solutions for high‑end equipment manufacturing. For more technical specifications and application cases, please visit our official website or contact our technical team for customized support.
