Bearings
Bearing
WHY 440C STAINLESS steel?
Good corrosion resistance to water and many weak chemicals.
Corrosion resistance can be improved by passivation.
Slightly softer than chrome steel so lower load ratings.
Will corrode in salt water or salt spray and poor resistance to acids/alkalis.
More expensive than chrome steel.
What is 440C?
A martensitic stainless steel. It's composed of these major alloy elements (I don't list the minor elements since they don't play a major role):
Carbon: 0.95-1.25% This increases hardenability and wear resistance, but decreases toughness in higher amounts.
Manganese: 45% This is added to reduce brittleness and improve forgeability, hardenability, and reducing deformation.
Item: SMR84ZZ
Structure: Deep Groove
Material: 440C Stainless Steel ( prefix "S" )
Bore Dia (d): 4 mm
Outer Dia (D): 8 mm
Width (B): 3 mm
Closures: Metal Shielded(ZZ)
Lubrication: Grease
Magnetic: little
Hardness: 58HRC
Corrosion Resistance: General
Clearance: C0
Grades: ABEC Grades 1
Dynamic Load Rating (Cr) (Newtons): 336
Static Load Rating (Cor) (Newtons): 113
Ball Qty: 7
Ball Dia (Dw): 1.200 mm
Weight: 0.56 g
Quantity: 1 Lot = 10 PCS
Widely used in household appliances, garden machinery, outdoor vehicles, industrial production, etc. Suitable for skateboards, longboards, inline skates, scooters, robots, ship rudder axles, etc.
Features: small friction, fast speed, smooth, low noise.