THRUST SHIMS
& WASHERS
shims
synchronisation
Friction-reducing washers – Thrust shims
DIAGLIDE THRUST SHIMS & WASHERS offer an extremely wide range of thrust washers, shim washers and balancing washers.
The DIAGLIDE THRUST SHIMS are used as bearing surfaces for all types of rotating applications in which a cost-effective component assumes the function of a plain bearing surface in lubricated and non-lubricated applications. Axial movements along a shaft can thus be adjusted to exact tolerances.
DIAGLIDE THRUST WASHERS are shims and shim washers that can be used to precisely adjust the center distances and length tolerances in axle and drive shafts, as well as any close-tolerance length dimension.
The shims and shim washers can be ground precisely to within a few μ ( < 5 μ ). The usual applications are axle assemblies, gearbox shafts, pump impellers and shafts and motors. Different thicknesses of the same types can be produced and then used in sets to set defined clearance and length compensation functions.
They are also frequently used for the synchronization of two assemblies or machine bodies. The substrates are available in various steel and light metal materials or, for example, in copper and nickel. Special materials are available on request. Anti-magnetic, conductive or insulating functions can also be produced.
Thanks to flexible production, individual parts and series parts can be manufactured with short delivery times.
THE MOST IMPORTANT ADVANTAGES WHEN USING THRUST SHIMS & WASHERS WITH DIAGLIDE COATING:
+ The all-rounder for tribological systems
+ Reduces friction coefficient and wear
+ High lubricating film affinity
+ Optimum sliding behavior
+ Wear-resistant friction pairing
+ Durable corrosion protection
+ Adjustable hardness (400 – 1.100 HV)
+ Increasing the safety factor
+ Cost reduction
+ Easy handling
+ Adjustable friction coefficients
+ Exact dimensional tolerances
+ Individual parts and series available
+ short delivery times
+ Very flexible production
Schematic representation of the friction-enhancing system consisting of dispersion layer and counterpart of the friction pairing
COATINGS TO REDUCE FRICTION IN COMBINATION WITH CORROSION AND WEAR PROTECTION
Textile machinery
DIAGLIDE coatings for wear parts
Conveying
& Pumps
DIAGLIDE
THRUST SHIMS
as thrust washers
Automotive &
Engine
DIAGLIDE THRUST WASHER AND SHIMS for sliding, friction-reducing applications in gearboxes and axle systems
Tool
& mold making
DIAGLIDE coatings for tools and molds
Motor
& Racing
DIAGLIDE coatings for injection system components
Aerospace
& space travel
DIAGLIDE coatings for aluminum, magnesium and titanium components
APPLICATION
In numerous applications, it is necessary to move metallic components on top of each other without them being subject to noticeable wear during use. Depending on the application, such component or material contact can take place with or without additional lubricant.
Typical examples of components are rotors and plungers for oil production, drive components for combustion engines, gearboxes or compressors, hydraulic cylinders or hydraulic components, pumps, pressure cylinders or components in textile machines. In most cases, the requirements go beyond high wear resistance combined with low friction, as the surface must also be highly resistant to corrosion. In addition, applied DIAGLIDE® coating systems must have exceptionally good adhesion to the base material and, in the case of cost-intensive components, allow damaged or worn surfaces to be repaired.
Coatings based on chromium and nickel or nickel alloys, which are used for DIAGLIDE® coatings, are considered to be wear-resistant coatings with a high degree of distribution. Both materials have a high to very high basic hardness. Hard materials withstand the mechanical stresses caused by pressure and/or friction. This prevents coating fragments from chipping and breaking off.
If, on the other hand, such chipping and break-offs occur and come between moving components, they act as abrasive particles and increase the damage to the surface due to wear.
Another option for reducing wear is the incorporation of friction-reducing solid lubricants – so-called dispersion layers. Proven solid lubricants include PTFE (polytetrafluoroethylene – Teflon), hexagonal boron nitride, as well as graphite and MoS2. As a matrix material for embedding solid lubricants, electroplated and electroless nickel as well as nickel-phosphorus alloys offer ideal conditions for producing surfaces with different properties tailored to the respective application. The hardness of the coatings can be adjusted in a range between around 450 HV and around 1,100 HV. The corrosion resistance of the coatings varies depending on the selected phosphorus content.
CHARACTERISTIC VALUES FOR WEAR/CORROSION PROTECTION WITH DIAGLIDE COATINGS
The application of DIAGLIDE® coatings gives metal workpieces improved properties with regard to wear and corrosion. Depending on the application, different variants from the group of composite and dispersion coatings are available.
| Variants through chemical deposition | Variants through electrolytic deposition |
|
Nickel + Nickel-Phosphorus Dispersion |
Nickel + Nickel Dispersion |
| – | Nickel + Chromium (chromium electrolytic) |
| Nickel-Phosphorus + Nickel-Phosphorus Dispersion | Nickel-Phosphorus + Nickel-Phosphorus Dispersion |
| Nickel + Chrome | Nickel-Phosphorus + Nickel-Phosphorus Dispersion |
| Nickel-Phosphorus + Chromium | – |
The nickel-phosphorus alloy variant can be deposited both chemically/extrinsically (> high contour accuracy, > low deposition rate) and electrolytically (> low contour accuracy, > high deposition rate).
Electroless nickel deposition is preferred for layer thicknesses of less than 30 μm (0.03 mm) due to the low deposition rate. Electrolytically deposited nickel is suitable for layers up to a few millimeters thick. The following variants are available for nickel-based dispersion layers:
| Parameter | Chemically deposited | Electroplated |
|
Separation rate |
0,17 μm/min – 0,35 μm/min |
3 μm/min – 10 μm/min |
|
Material |
Nickel-Phosphorus Alloy with 2 % to 12 % phosphorus |
Nickel + Nickel-Phosphorus with 2 % to 12 % phosphorus |
|
Layer thicknesses |
up to 30 μm (in exceptional cases up to 100 μm) |
50 μm – 200 μm (up to 1000 μm on request) |
|
Dispersing agent |
Diamond, Silicon Carbide (SiC), hex. Boron nitride (hBN), Boron Carbide (B4C), PTFE; Nanoparticles (< 1 μm) |
Diamond, silicon carbide (SiC), hex. Boron Nitride (hBN), Boron Carbide (B4C) |
|
Particle sizes |
1-3 Nano / μm (for special applications up to 50 μm) |
1-3 Nano / μm |
|
Contour fidelity |
high |
medium-high |
PRODUCT
SYSTEM SHEET
CHARACTERISTIC VALUES FOR WEAR/CORROSION PROTECTION WITH DIAGLIDE COATINGS
The application of DIAGLIDE® coatings gives metal workpieces improved properties with regard to wear and corrosion. Depending on the application, different variants from the group of composite and dispersion coatings are available.
| Variants through chemical deposition | Variants through electrolytic deposition |
|
Nickel + Nickel-Phosphorus Dispersion |
Nickel + Nickel-Dispersion |
| – | Nickel + Chromium (chromium electrolytic) |
| Nickel-Phosphorus + Nickel-Phosphorus Dispersion | Nickel + Nickel-Phosphorus Dispersion |
| Nickel + Chrome | Nickel-Phosphorus + Nickel-Phosphorus Dispersion |
| Nickel-Phosphorus + Chromium | – |
The nickel-phosphorus alloy variant can be deposited both chemically/extrinsically (> high contour accuracy, > low deposition rate) and electrolytically (> low contour accuracy, > high deposition rate).
Electroless nickel deposition is preferred for layer thicknesses of less than 30 μm (0.03 mm) due to the low deposition rate. Electrolytically deposited nickel is suitable for layers up to a few millimeters thick. The following variants are available for nickel-based dispersion layers:
| Parameter | Chemically deposited | Electroplated |
|
Separation rate |
0,17 μm/min – 0,35 μm/min |
3 μm/min – 10 μm/min |
|
Material |
Nickel-phosphorus alloy with 2 % to 12 % phosphorus |
Nickel + nickel-phosphorus with 2 % to 12 % phosphorus |
|
Layer thicknesses |
bis 30 μm (in exceptional cases up to 100 μm) |
50 μm – 200 μm (on request up to 1000 μm) |
|
Dispersing agent |
Diamond, silicon carbide (SiC), hex. Boron nitride (hBN), boron carbide (B4C), PTFE; Nanoparticles (< 1 μm) |
Diamond, silicon carbide (SiC), hex. Boron Nitride (hBN), Boron Carbide (B4C) |
|
Particle sizes |
1-3 Nano / μm (for special applications up to 50 μm) |
1-3 Nano / μm |
|
Contour fidelity |
high |
medium-high |
PRODUCT
SYSTEM SHEET
