Domestic Substitution of Anti-Loosening Shims: How DAOLER Diamond Friction Shims Break the Monopoly in High-End Equipment
## I. Dependence‑on‑Imports Dilemma of Anti‑Loosening Shims for High‑End Equipment
In high‑end equipment sectors including wind power, robotics, aerospace and rail transit, anti‑loosening shims for critical joints have long been monopolized by foreign brands. Thanks to stable friction coefficient and fretting‑wear resistance, these imported products take up most share of China’s high‑end market. They come with not only high prices, but also long lead‑times and slow technical support response, which greatly restrict the independent and controllable development of domestic high‑end equipment.
After years of R&D efforts, DAOLER Technology (Shandong) Co., Ltd. has successfully launched DAOLER® Diamond Friction Shims. Key technical breakthroughs have been achieved in the domestic substitution of anti‑loosening shims, delivering independent and controllable precision connection solutions for domestic high‑end equipment.
## II. Technical Barriers and Pain Points of Imported Anti‑Loosening Shims
Conventional imported anti‑loosening shims mostly adopt mechanical knurling or special coating processes. Though friction can be improved to a certain degree, they suffer from the following drawbacks:
- Unstable friction coefficient, heavily affected by temperature and humidity;
- Insufficient coating hardness, prone to wear and failure under high‑frequency vibration;
- Limited available thickness options, failing to meet ultra‑thin requirements for precision connections;
- High purchasing cost together with risk of supply disruption.
More importantly, ordinary anti‑loosening shims can only prevent thread loosening, yet cannot restrain micro‑slip on flange mating surfaces — which is the core cause of connection‑accuracy degradation for high‑end equipment.
## III. Technical Breakthroughs of DAOLER® Diamond Friction Shims for Domestic Substitution
The domestic‑substitution solution of DAOLER® anti‑loosening shims is built upon self‑developed Diamond Claw® interlocking technology and nickel‑phosphorus‑diamond composite plating process. Multiple key performance indicators have reached or exceeded the level of imported counterparts:
1. Ultra‑high Friction Coefficient
Static friction coefficient ≥0.5, and ≥0.6 measured under certain working conditions. Far superior to traditional flat washers and spring lock washers, it fundamentally suppresses interface micro‑slip.
2. Super‑Hard Coating
Coating hardness ≥1000HV with outstanding wear resistance. It maintains stable friction performance in long‑term service under high‑frequency alternating loads.
3. Ultra‑Thin Precision Dimensions
Ultra‑thin thickness starting from 0.1 mm with tight tolerance. Direct replacement for imported shims without modifying equipment mechanical structures.
4. Stable Performance in Wide Temperature Range
Stable properties from ‑40℃ to 150℃, compatible with various extreme working conditions.
## IV. Application Verification for Domestic Substitution of Anti‑Loosening Shims
At present, DAOLER® Diamond Friction Shims have completed domestic‑substitution verification in multiple high‑end‑equipment industries:
- **Wind Power**: No loosening detected after long‑term operation on wind‑turbine tower flanges and gearbox joints.
- **Robotics**: Effectively suppress positioning drift for flange connections of harmonic reducers and RV reducers.
- **Aerospace**: Meet high‑reliability requirements for pre‑load interfaces of precision fasteners.
- **New‑Energy Vehicles**: Deliver excellent vibration‑resistance and shock‑resistance for battery pack and motor connections.
Several leading equipment manufacturers have finished batch validation of DAOLER® products, realizing domestic substitution of critical anti‑loosening shims and greatly cutting procurement cost as well as supply‑chain risks.
## V. Significance and Outlook of Domestic Substitution for Anti‑Loosening Shims
The successful development of DAOLER® Diamond Friction Shims marks China’s leap from follower to peer competitor in the field of super‑hard friction materials. Domestic substitution of anti‑loosening shims not only reduces manufacturing costs of high‑end equipment, but also guarantees independent and controllable industrial‑supply chains, offering solid support for the secure development of national high‑end‑equipment manufacturing.
DAOLER Technology (Shandong) Co., Ltd. will keep investing in R&D to optimize product performance and expand application scenarios. Reliable domestic‑substitution solutions will be provided for more high‑end equipment, boosting Chinese manufacturing to move toward the high‑end of value chain.
For further information about DAOLER® domestic‑substitution solutions and technical specifications, please visit our official website or contact the technical team for customized support.
In high‑end equipment sectors including wind power, robotics, aerospace and rail transit, anti‑loosening shims for critical joints have long been monopolized by foreign brands. Thanks to stable friction coefficient and fretting‑wear resistance, these imported products take up most share of China’s high‑end market. They come with not only high prices, but also long lead‑times and slow technical support response, which greatly restrict the independent and controllable development of domestic high‑end equipment.
After years of R&D efforts, DAOLER Technology (Shandong) Co., Ltd. has successfully launched DAOLER® Diamond Friction Shims. Key technical breakthroughs have been achieved in the domestic substitution of anti‑loosening shims, delivering independent and controllable precision connection solutions for domestic high‑end equipment.
## II. Technical Barriers and Pain Points of Imported Anti‑Loosening Shims
Conventional imported anti‑loosening shims mostly adopt mechanical knurling or special coating processes. Though friction can be improved to a certain degree, they suffer from the following drawbacks:
- Unstable friction coefficient, heavily affected by temperature and humidity;
- Insufficient coating hardness, prone to wear and failure under high‑frequency vibration;
- Limited available thickness options, failing to meet ultra‑thin requirements for precision connections;
- High purchasing cost together with risk of supply disruption.
More importantly, ordinary anti‑loosening shims can only prevent thread loosening, yet cannot restrain micro‑slip on flange mating surfaces — which is the core cause of connection‑accuracy degradation for high‑end equipment.
## III. Technical Breakthroughs of DAOLER® Diamond Friction Shims for Domestic Substitution
The domestic‑substitution solution of DAOLER® anti‑loosening shims is built upon self‑developed Diamond Claw® interlocking technology and nickel‑phosphorus‑diamond composite plating process. Multiple key performance indicators have reached or exceeded the level of imported counterparts:
1. Ultra‑high Friction Coefficient
Static friction coefficient ≥0.5, and ≥0.6 measured under certain working conditions. Far superior to traditional flat washers and spring lock washers, it fundamentally suppresses interface micro‑slip.
2. Super‑Hard Coating
Coating hardness ≥1000HV with outstanding wear resistance. It maintains stable friction performance in long‑term service under high‑frequency alternating loads.
3. Ultra‑Thin Precision Dimensions
Ultra‑thin thickness starting from 0.1 mm with tight tolerance. Direct replacement for imported shims without modifying equipment mechanical structures.
4. Stable Performance in Wide Temperature Range
Stable properties from ‑40℃ to 150℃, compatible with various extreme working conditions.
## IV. Application Verification for Domestic Substitution of Anti‑Loosening Shims
At present, DAOLER® Diamond Friction Shims have completed domestic‑substitution verification in multiple high‑end‑equipment industries:
- **Wind Power**: No loosening detected after long‑term operation on wind‑turbine tower flanges and gearbox joints.
- **Robotics**: Effectively suppress positioning drift for flange connections of harmonic reducers and RV reducers.
- **Aerospace**: Meet high‑reliability requirements for pre‑load interfaces of precision fasteners.
- **New‑Energy Vehicles**: Deliver excellent vibration‑resistance and shock‑resistance for battery pack and motor connections.
Several leading equipment manufacturers have finished batch validation of DAOLER® products, realizing domestic substitution of critical anti‑loosening shims and greatly cutting procurement cost as well as supply‑chain risks.
## V. Significance and Outlook of Domestic Substitution for Anti‑Loosening Shims
The successful development of DAOLER® Diamond Friction Shims marks China’s leap from follower to peer competitor in the field of super‑hard friction materials. Domestic substitution of anti‑loosening shims not only reduces manufacturing costs of high‑end equipment, but also guarantees independent and controllable industrial‑supply chains, offering solid support for the secure development of national high‑end‑equipment manufacturing.
DAOLER Technology (Shandong) Co., Ltd. will keep investing in R&D to optimize product performance and expand application scenarios. Reliable domestic‑substitution solutions will be provided for more high‑end equipment, boosting Chinese manufacturing to move toward the high‑end of value chain.
For further information about DAOLER® domestic‑substitution solutions and technical specifications, please visit our official website or contact the technical team for customized support.
