Bearing differences, koyo?

[sodafeld1]

In one diff kit i got 30306djr and in another kit i got 3030djr-1! I asked koyo and they said there is only minor internal diiferences.. cryptic reply. Does anyone know what irw and orw means? internal and outer something. Dynamic load rating is higher on the -1.

They look identical.

HC30306DJR-1

ID: 30mm

OD: 72mm

IRW: 19.50mm

ORW: 13.5

TW: 20.75mm

Static Load rating: 2kN

Dynamic Load rating: 2kN



HC30306DJR

ID: 30mm

OD: 72mm

IRW: 19.00mm

ORW: 14.00mm

TW: 20.75mm

Static Load rating: 2kN

Dynamic Load rating: 0.5kN

 

[sodafeld1]

inner ring width, outer ring width