 Component Parts - Terminology
The figures below illustrate an assembled Ball Bearing and the terms used
to describe each component: |
Retainers/Cage
The following retainers are available in most of our Ball Bearings. |
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● Ribbon Retainer/Cage (Symbol R)
Made from high precision strip steel, pressed and formed with spherical
ball pockets. The male and female retainer halves are caulked together.
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● Crown Retainer/Cage (Symbol H)
Made from hardened high precision strip steel and pressed into a shape
form like a crown.
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● Plastic Retainer/Cage (Symbol MN etc.)
Plastic retainers are offered in a range of materials, such as Nylon 6/6
with glass fiber, and has an advantage for longer life and lower acoustic
noise.
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| Shields and Steels (Enclosures) |
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●Steel Shield-Snap Ring Type
(Symbol ZZ)
Refers to NMB numbering system.
The metal shield is a steel plate secured in the outer ring with a steel
snap ring.
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●Steel Shield-Caulking Type
(Symbol HH or KK)
Refers to NMB numbering system.
(Symbol ZZ)
Use to JIS numberingsystem.
The shield is a formed steel plate, pressed into a recess in the outer ring.
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●Rubber Non-Contact Steel
(Symbol SS)
Refers to NMB & JIS numbering system.
The rubber non-contact seal is constructed with a snap-fit into the outer
ring.
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●Rubber Contact Seal
(Symbol DD)
Refers to NMB & JIS numbering system.
Refers to NMB & JIS numbering systems. The rubber contact seal provides a positive contact
onto the inner ring and is a snap fit into the outer
ring.
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