The shaft surface should typically be hardened to at least 45 HRC to prevent the seal lip from grooving the metal.
Automotive transmissions, engine oils, and extreme pressure (EP) lubricants. -55°C to +150°C Up to 20 m/s
DIN 3760 AS 40 x 55 x 7 NBR represents a rubber-covered seal with a dust lip, built for a 40mm shaft, a 55mm housing bore, a 7mm width, made from Nitrile rubber. Common Material Specifications din 3760 pdf
Often caused by sharp edges on the shaft keyway scoring the delicate sealing lip during assembly. Always use an installation sleeve over keyways.
Definitions for single-lip (A) and dust-lip (AS) designs. The shaft surface should typically be hardened to
The standard is detailed and methodical, providing engineers with clear guidelines for seal dimensions, production, and quality assurance.
The DIN 3760 PDF document is essential for several reasons: Common Material Specifications Often caused by sharp edges
A key feature is the between the shaft and housing bore, which prevents premature seal failure.
: The standard "workhorse" material. Good for oils and greases.