A Valiant BJ / Powerdyne BD-11

More info on bearings

POWERDYNE BD11 IMPELLER SHAFT BEARINGS

Powerdyne Factory Installed (Factory New)

Manufacturer: SKF
P/N: 6202-2RSTNH/HC5C3WT (Highest quality)

6 = deep groove ball bearing
2 = width / height series
02 = bore size of 15mm
2RS(H) = two contact seals
TNH = Injection molded cage of glass fiber reinforced polyetheretherketone (PEEK), rolling element centered
HC5 = ceramic rolling elements
C3 = greater than normal clearance
WT = special grease fill for temperature range -40C to 160C
WT Grease fill for low as well as high temperatures (e.g. –40 to +160 °C). WT or a two-figure number following WT identifies the actual grease. An additional letter or letter/ figure combination as mentioned under “HT” identifies filling degrees other than standard.
Examples: WT or WTF1

Replacement Bearing SKF from KAMAN AEROSPACE (Acceptable Replacement)

Manufacturer: SKF
P/N: 6202-2RSH/C3GJN

6 = deep groove ball bearing
2 = width / height series
02 = bore size of 15mm
2RS(H) = two contact seals
C3 = greater than normal clearance
GJN = grease type
GJN Grease with a polyurea thickener of consistency 2 to the NLGI Scale for a temperature range –30 to +150 °C (normal fill grade)

928 Motorssports HP Bearing (Non-Special Application)

Korea Bearing Company (KBC)(now owned by FAG)
P/N: 6202Z

6 = deep groove ball bearing
2 = width / height series
02 = bore size of 15mm

Z= single or double shield

The KBC 6202Z cross references to a SKF Explorer bearing 6202-2Z (the Z or 2Z means double metal shields)
Limiting RPM is 22,000 rpm for a quality SKF bearing only.
Limiting Temperature range see diagram 1. At an average engine compartment temperature of 210 degree F
a SKF 6202-2Z bearing has a max. rpm of about 5,000 rpm.