Bearings
TECHNICAL SPECS
Item: SMR117ZZ
Structure: Deep Groove
Material: 440C Stainless Steel ( prefix "S" )
Bore Dia (d): 7 mm
Outer Dia (D): 11 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): 387
Static Load Rating (Cor) (Newtons): 162
Ball Qty: 9
Ball Dia (Dw): 1.200 mm
Weight: 0.71 g
Quantity: 1 Lot = 10 PCS

WHY 440C STAINLESS steel?
Good corrosion resistance to water and many weak chemicals
Corrosion resistance can be improved by passivation
Good for temperatures up to 300°C
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