7307AC/P6 is an angular contact ball bearing with the following specifications:
Basic Dimensions
Inner Diameter (d): 35 mm
Outer Diameter (D): 80 mm
Width (B): 21 mm
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The B-1416 needle roller bearing (also often written as B1416 or B-1416) is a stamped outer ring full complement needle roller bearing, commonly found in the imperial series. Its main parameters are a...

The 6706 2RS is a thin-walled deep groove ball bearing, with P5 precision rating, double-sided rubber seal, and ZV3 vibration rating.
SIZE:30*37*4 WEIGHT:0.008KG ...

Inner Diameter (d): 8 mm
Outer Diameter (D): 24 mm
Width (B): 8 mm
Flange Diameter: 27 mm
Dynamic Load Rating: Approx. 3.35 kN to 3.9 kN
Static Load Rating: Approx. ...

ZKLF2068 is a thrust angular contact ball bearing commonly used in high-precision, high-rigidity ball screw drive systems, such as machine tools, medical equipment, and precision engineering fields. B...

The 683 bearing is a common miniature deep groove ball bearing widely used in precision equipment. Below is a summary of its core parameters:
Basic Dimensions
Inner Diameter (d): 3 mm