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A simple, strong solution for critical joints anywhere on the vehicle
Every day, you strive for a balance among competing demands: lighter weight and higher performance vs. safety factors and cost. Entire designs depend on the resulting load calculations. Often, you don’t know if they’re accurate until testing – well after the design is complete. Bolted joint failure happens. Here’s a look at why.
Shear forces are increasing – and not just within the vehicle powertrain. Electric vehicles generate high engine torque and shear force and often weigh significantly more, putting strain on critical joints throughout the vehicle. If a joint begins to slip, it may lead to significant failure.
Ultra-thin, compact, highly reproducible and tailored to customers designs, 3M™ Friction Shims consist of a nickel coated steel substrate with partially embedded diamonds. When placed between two components in a bolted connection, the diamonds “bite” into the surface of each component to create a microform fit. This significantly increases friction between the two parts, strengthening and stabilizing the connection.
3M provides Friction Shims for nearly any critical joint in the vehicle: chassis, subframes, e-drive mounts, strut assemblies, sway bars, coil spring seats and more.
Our Friction Shims protect automotive bolted joints against higher shear loads. This is especially critical in electrified vehicles, which are heavier compared to traditional vehicles. They can preserve and strengthen bolted joints in e-coated chassis, battery mounts, suspensions and many other places throughout the vehicle.
Keep your current design by using Friction Shims as a drop-in solution for improved friction coefficients. They can also create new possibilities: as force increases, load-bearing components can remain the same or decrease in size.
You’ll see the difference that 3M Friction Shims make during testing, and long-term in continued on-the-road performance. With 3 to 5 times the friction – and the higher load capacities that result – your designs are much better protected against bolted joint fatigue, loosening or failure.
3M supplies Friction Shims in various grades that can increase coefficient of static friction by a factor of 3 to 5. We can provide Friction Shims for crankshaft or camshaft assemblies, as well as chassis and subframes. Preassembly solutions include 2 or 3 dimensional clips for faster installation. Friction Shims can also be disassembled and reused.
3M Friction Shims can help you streamline your design, and lightweight the overall vehicle, by downsizing critical automotive joints. You can build them with fewer fasteners. You can simplify them without the worry of failure under force loads. Our Friction Shims perform in a very broad range of conditions and mating surfaces.
3M is constantly working to meet the evolving challenges of automotive OEM and Tier suppliers worldwide. If you need help finding an existing solution or would like to talk about specific ideas you’re working on, get in touch with us.
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