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Top Product: 3M Friction Shims -- Why have more than 300 million been sold?

3M Friction Shims. [Credit: Photo courtesy of 3M]

 

 

3M Friction Shims are small, thin steel shims with a big impact. They can increase maximum load and peak torque in bolted connections without additional fasteners or redesigns. With more than 300 million Friction Shims made and sold worldwide, what makes these small components so useful?

3M Friction Shims contain partially embedded diamond particles that resist breakage. [Credit: Photo courtesy of 3M]

 

 

 

 

3M Friction Shims make stronger and more stable bolted connections. They increase friction coefficients in torsional and static joints, particularly in demanding automotive applications. Nickel-coated steel shims contain partially embedded diamond particles that resist breakage. When applied with pressure between two mating surfaces, the diamonds "bite" into each surface to create a microform fit.

Why is that so special? It allows for a coefficient of static friction up to five times greater than in a conventional bolted connection -- especially valuable as electric vehicles take center stage in the global marketplace. Heavy lithium-ion battery packs combined with higher torque can often put considerably more strain on critical chassis and battery mount joints, for example.

3M Friction Shims application. [Credit: Photo courtesy of 3M]

 

 

3M Friction Shims fit within most engineering tolerances, allowing for lightweight, compact designs. They can also be used as a drop-in solution to stabilize joints further down the manufacturing chain.

VIDEO: 3M Friction Shims for Improved Torque in Automotive Bolted Connections. [Credit: 3M]

Friction Shims can be used in a wide range of applications, including:

• Shear joints in automotive chassis;
• Torsional joints;
• Flange joints;
• Joints with central bolt;
• Bolted connections; and
• Fastener systems.

VIDEO: 3M Friction Shims: Torque Testing Demonstration Tool. [Credit: 3M]

According to 3M, engineers can use 3M Friction Shims to:

• Secure critical joints in chassis, battery mounts, suspensions, and other critical areas in internal combustion and electric vehicles.
• Optimize designs for multi-material automotive structures to withstand higher force loads without changing parts or part sizes.
• Enhance pursuits of lightweighting goals by achieving the same shear and peak load performance using fewer smaller and lighter mechanical fasteners.
• Manage noise, vibration, and harshness (NVH) by dampening micromovements in bolted joints, enhancing passenger experiences and increasing joint life.

VIDEO: Increase engine performance & efficiency with 3M Friction Shims: Extended webinar. [Credit: 3M UK and Ireland]

3M supplies Friction Shims in various grades for specific friction coefficients and related shear or torque requirements. Friction Shims can be specified for ultra-thin torsional crankshaft or camshaft assemblies, or to create form fits even through e-coatings and rough surfaces. Preassembly solutions include inner clips for faster installation. Friction Shims can also be disassembled and reused.

Learn more at 3m.com/3M/en_US/p/c/advanced-materials/ceramics/friction-shims/.

Source: 3M

Published September 2024

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