What are the dimensions of sg5 bearings inside of Rollerblade wheels?

Question

I'm building a FAT catapult and for the rollers im using rollerblade wheels. But for the axle I kneed to know the dimensions of the hole inside the bearing. HELP!!!

Answer 1

Most inline skates use 608 (industry designation for the size) bearings.

Their dimensions are 22mm Diameter x 7mm Wide and the inner diameter is 8mm



Some inline hockey skates use 688 bearings

Their dimensions are 16mm Diameter x 5mm Wide and the inner diameter is 8mm

Answer 2

Rollerblade Wheels Sizes

Answer 3

SG5 is a rating that is applied to the bearing based on it's design, it does not define the size. You will have to measure it or get the actual size code off the bearing.



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