Is a r188kk bearing really needed, or will a r188zz also do? I'm not sure, but they seem to have the same measurements, only differing in the material.
@MIAL_158961 hey, I think r188zz should work also. they are just sealed. but I think it is important that the bearing should be yoyo bearings. so that the outer wall is curved inside to hold the cord. seams like they are called ur188 bearings.
Is a r188kk bearing really needed, or will a r188zz also do? I'm not sure, but they seem to have the same measurements, only differing in the material.
And what is the function of the O-rings? (edited)
@MIAL_158961 hey, I think r188zz should work also. they are just sealed. but I think it is important that the bearing should be yoyo bearings. so that the outer wall is curved inside to hold the cord. seams like they are called ur188 bearings.
@andimoto UR188 seams to be ceramic bearing. but i mean R188 for yoyos