Bearings
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

TECHNICAL SPECS

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

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.