Balls Retainer
The ball bearing cage (also known as a ball bearing retainer or ball separator, these are used interchangeably), is the component in a ball bearing that separates the balls, maintains the balls symmetrical radial spacing, and in most cases, holds the bearings together.The function of a retainer is to maintain proper distance between rolling elements. Almost all roller bearings have stamped retainers made of iron-silicon bronze or lead brass.
Applications: Ball retainers are used without races in a variety light duty applications including retail displays, bicycle parts and gates.
| NO.# | Specification | Frame Diameter（Dmax） | Frame Diameter（Dmin） |
|---|---|---|---|
| #1 | 4mm ×22 | 40mm | 33.5mm |
| #2 | 4mm×16 | 37.4mm | 31mm |
| #3 | 8mm×9 | 44.5mm | 31mm |
| #4 | 4mm×20 | 40mm | 33.5mm |
| #5 | 4mm×20 | 37mm | 27mm |
| #6 | 8mm×7 | 37.6mm | 24mm |
| #7 | 6mm×9 | 33.7mm | 24mm |
| #8 | 4.76mm×9 | 30.7mm | 22mm |
| #9 | 6.35mm×9 | 29mm | 18mm |
| #10 | 6mm×7 | 25mm | 14mm |
| #11 | 4.76mm×7 | 20.4mm | 12mm |
| #12 | 4mm×7 | 18.8mm | 11mm |
| #13 | 6.35mm×15 | 43.7mm | 31.5mm |
| #14 | 4.76mm×15 | 39mm | 27.3mm |
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