Singlepiece SR166CZZ hybrid ceramic miniature bearing — precision ABEC7 performance in an inchsize reel bearing. Key benefits precision: ABEC7 tolerance provides smooth, consistent rotation for sensitive, speed applications. Low friction and long life: hybrid design (CB — ceramic balls with stainless steel rings) reduces rolling resistance and wear compared with allsteel bearings. Protection and reliability: ZZ double metal shields keep out dust and debris while retaining lubricant, lowering maintenance needs. Inchcompatible sizing: manufactured to standard inch dimensions for straightforward replacement in inchbased miniature equipment. Key attributes Model: SR166CZZ (also referenced as SR166C ZZ ABEC7 CB, R166, SR166, SR166CZZ) Quantity: 1 piece (1Pcs) Dimensions (mm): inner diameter 4.763 mm, outer diameter 9.525 mm, width 3.175 mm Inch equivalents: 3/16' x 3/8' x 1/8' (inch miniature sizing) Construction: stainless steel rings with ceramic (CB) rolling elements — hybrid ceramic bearing Shielding: ZZ (double metal shields on both sides) Precision class: ABEC7 Typical applications Fishing reels and miniature reel systems where smooth, reliable rotation and low drag are required. Small electric motors, gimbals, and precision rotary mechanisms in RC equipment, instrumentation, and compact electronics. Precision spindles or rotating shafts in measuring devices and other inchbased miniature machinery. Installation and compatibility notes Designed to fit a 4.763 mm (3/16') shaft and a housing bore sized for a 9.525 mm (3/8') outer diameter. Double shields (ZZ) provide contamination protection and retain lubricant; ideal where sealed, lowmaintenance bearings are preferred. Confirm shaft and housing tolerances match inch miniature standards before installation for performance. Specifications summary SR166CZZ, ABEC7, CB stainless steel hybrid ceramic bearing Size: 4.763 x 9.525 x 3.175 mm Shield type: ZZ (double metal shields) Quantity: 1 piece This SR166CZZ bearing offers a compact, precision solution when you need an inchsize hybrid ceramic bearing with tolerance, corrosionresistant stainless steel construction, and protective double shields.