EKagrip® FRICTION SHIMS WITH ELECTROLESS NICKEL COMPOSITES SURFACES
Wherever components must be reliably joined together to transmit forces and torques, EKagrip® friction shims provide simple, reliable and technically mature solutions.
EKagrip® friction shim is a metal foil with a friction-enhancing coating based on electroless nickel with embedded hard material (= electroless nickel composites surface).
Applications
EKagrip® friction shims have proven themselves millions of times in general mechanical engineering, in machine tools, marine engineering, wind and water power generators, turbines, automotive engineering and motor sports.
Properties
EKagrip® shims are characterized by:
- Microscale interlocking with the joint surfaces
- Adjustable and reproducible surface properties
- Enables weight and packaging-optimized designs
- Static friction increase by up to 300 %
- Easy assembly and resassembly
Many years of industrial experience and technical support by laboratory and bench tests ensure that EKagrip® friction shims meet any requirements.
| Functional Coatings | |||
| Material properties | EKagrip® 10 | EKagrip® 20 PLUS | EKagrip® 25 PLUS |
| Form as supplied | Shim with EKagrip® 10 coating |
Shim with EKagrip® 20 PLUS coating |
Shim with EKagrip® 25 PLUS coating |
| Hard particle | Diamond | Diamond | Diamond |
| Mean particle size | 10 µm | 20 µm | 25 µm |
| Diamond-surface concentration |
8-16% | 8-20% | 8-25% |
| Matrix material | Electroless nickel phosphorus |
Electroless nickel phosphorus |
Electroless nickel phosphorus |
| Thickness of matrix y | 5-9 µm | 10-15 µm | 10-20 µm |
| Total layer thickness x | 10-20 µm | 20-30 µm | 25-35 µm |
| Heat treatment | 150°C ± 10°C 350°C ± 10°C |
150°C ± 10°C / 350°C ± 10°C |
350°C ± 10°C |
| Hardness of nickelphosphorus matrix |
approx. 600 HV / 900 HV |
approx. 600 HV / 900 HV |
approx. 900 HV |
| Color | metallic or charcoal | metallic or charcoal | metallic or charcoal |
| Shim material (preferably) | C 75 S (acc. to EN 10132-4) |
C 75 S (acc. to EN 10132-4) |
C 75 S (acc. to EN 10132-4) |
| Shim thickness d | 0.1 mm (others available on request) | 0.1 mm (others available on request) | 0.1 mm (others available on request) |
| Max. diameter for 0.1 mm thick shims (others available on request) |
200 mm | 200 mm | 200 mm |
| Thickness tolerance of base part before coating |
± 0.01 mm | ± 0.01 mm | ± 0.006 mm |
| Base part production by | Laser cutting or stamping |
Laser cutting or stamping |
Laser cutting or stamping |
| Mean roughness Rz of counterpart surface (transversal to direction of machining) |
Rz << 10 µm | Rz << 20 µm | Rz << 25 µm |
| Min. contact pressure | P > 50 MPa | P > 50 MPa | P > 50 MPa |
| Max. service temperature | 400°C | 400°C | 400°C |
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