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Ceramic Bearing Part Numbering System

Unasis provide a wide range of ceramic ball options across a variety of sizes. Material options include Silicon nitride (Si3N4), Zirconia (ZRO2) and Silicon carbide (SIC) from 0.4mm to just over 115mm in diameter with the most common sizes in between. Precision grades provided are 5, 10, 16, 25 and 100.

Ceramic balls have excellent resistance to wear and seizure, they offer solutions for high temperature environments (Up to 800°C for Si3N4) high rigidity, light weight and are non magnetic with insulating properties.

Applications include high speed spindle bearings, solenoid valves, down hole pumps, vacuum equipment, gas monitoring devices and turbo chargers.

Ceramic Ball Part Numbering System

Example: 608 ZR PP C3 PT SI
C1 FC
.2RS C2 TN9
SI 2RZ C3 PE SI
ZR PP C4 PT ZR
Size SC .2PE C5 RC SC

Table Key

Size
Bearing part number defined by: inner diameter x outer diameter x width

Race Material
SI = Silicon Nitride
ZR = Zirconia
SC = Silicon Carbide

Seals/Shields
~ = Open
.2RS = Two rubber seals
.2RZ = Two low contact seals
PP = Two PTFE shields
.2PE = Two PEEK shields

Ball Material (If different from race material)
SI = Silicon Nitride
ZR = Zirconia
SC = Silicon Carbide

Cage/Separator
FC = Full Compliment
TN9 = Nylon/Polyamide
PE = PEEK
PT = PTFE
RC = Metal

Clearance
C1 = Less than C2
C2 = Less than normal
~ = Clearance Normal
C3 = Greater than Normal
C4 = Greater than C3
C5 = Greater than C4

View Ceramic Bearings Suggested Combinations »

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