625ZZ Bearing 5x16x5mm ABEC-5 Double Shield Miniature Ball Bearings, 625-ZZ for Makefr RS CNC 32 Tutors (Pick of 10Pcs)

• Structure of bearing 625:Inner & Outer Ring, cage, steel balls, grease, ZZ shield
• Pre-lubricated with grease:The main purpose of lubrication is to reduce friction and wear inside bearings that may cause premature failure.
• Nylon plastic retainers:Used for high speed rotation and low noise levels
• Made of chrome steel:The typical surface hardness for bearing components made from this material ranges from 60-64 on the Rockwell hardness C scale (Rc).
• Dimensions:Inner Bore=5mm; Outer Diameter=16mm; Width=5mm.

Miniature Bearing Types & Features Miniature and instrument ball bearings can be divided into two basic types, deep groove and angular contact. The first (deep groove) can also be classified as "Open", "Shielded", or "Sealed" depending on the existence and type of seal or shield. Deep groove ball bearings have two inherent advantages; they can sustain some axial load in either direction as well as radial loads, and the two raceway cross-sections are simple circular arcs which can be very precisely finished so the bearings have low friction and very little noise or vibration. Several different cage designs are available with different characteristics and the choice depends upon the individual application. TECHNICAL SPECS Model: 625-ZZ Inner (d): 5 mm Outer (D): 16 mm Width (B): 5 mm Weight (g): 4.55 g Grade: ABEC-5 Material: 52100 Chrome Steel Seal: 2 Shield Qty: 1 Lot = 10 PCS