S697ZZ Miniature Deep Groove Ball Bearing ABEC-1 440C Roller Stainless Steel S697Z S697 Z ZZ Ball Bearings 7 * 17 * 5 mm

BearingsBearingWHY 440C STAINLESS steel?Good corrosion resistance to water and many weak chemicalsCorrosion resistance can be improved by passivationGood for temperatures up to 300CSlightly softer than chrome steel so lower load ratingsWill corrode in salt water or salt spray and poor resistance to acids/alkalisMore expensive than chrome steelTECHNICAL SPECSItem: S697ZZStructure: Deep GrooveMaterial: 440C Stainless Steel ( prefix "S" )Bore Dia (d): 7 mmOuter Dia (D): 17 mmWidth (B): 5 mmClosures: Metal Shielded(ZZ)Lubrication: GreaseMagnetic: little Hardness: 58HRCCorrosion Resistance: GeneralClearance: C0Grades: ABEC Grades 1Dynamic Load Rating (Cr) (Newtons): 1364 Static Load Rating (Cor) (Newtons): 575Ball Qty: 9Ball Dia (Dw): 2.381 mmWeight: 5.01 gQuantity: 1 Lot = 10 PCSWhat 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.Silicon: 30% This is a deoxidizer and improves hot-forming properties.Chromium: 17.00-18.00% Added only to high alloy tool steels, this improves hardenability, high wear resistance, toughness, and corrosion resistance.Molybdenum: 50% Improves deep hardening and toughness.These basic elements (along with iron) are a simple combination that works well together, and has for many decades.This alloy is technically classified as UNS (Unified Numbering System) S44044. It's also classified as SAE (Society for Automotive Engineers) as 51440C.The American Iron and Steel Institute classifies it as 440C martensitic standar

• Bearings
• Material: paper
• Item weight: 1.21 pounds