Automotive fasteners & vehicle components · NVH bush inner metals & inner sleeves
NVH bush inner sleeves
Cold-forged inner sleeves with a bulged barrel and serrated end faces for rubber-to-metal NVH bushes — boron steel, heat treated, phosphated for bonding.
Representative 3D
Specifications
Specifications
- Material
- Boron steel 10B21
- Heat treatment
- 30–34 HRC
- Process
- Cold forged
- Surface
- Zinc phosphated for rubber bonding
- Family
- Automotive fasteners and vehicle components
- Group
- NVH bush inner metals & inner sleeves
- Materials
- Boron steel
Exact grade, size, finish and standard are confirmed against your drawing or enquiry.
Industries
Used in
- Automotive OEM & component manufacturing
- Electric vehicles & mobility
- Automotive aftermarket & retail replacement
- Vehicle segments
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Explainer
Rubber-to-metal bonding inserts
An NVH bush isolates vibration between a suspension arm, subframe or engine mount and the body. Rubber is moulded and chemically bonded to a metal inner metal or inner sleeve; the outer shell is pressed into the arm or bracket.
- The insert carries the bolt clamp load — so it is cold formed in boron steel and heat treated (around 30–36 HRC).
- Its shape locks the rubber: a flared conical flange, a bulged barrel, end slots or serrated end faces stop the rubber turning or sliding.
- The surface is prepared for bonding — steel-grit blasted or zinc phosphated — and kept free of oil so the bonding agent holds.
- Ends and bores are held to tight tolerances so the bush seats square and the bolt passes freely.
