608 Bearing Spool Holder

​This design is a special design which by a very special friend. This design less plastic and just use a 608 bearing with M8 nut and it work. Clever as always! Don't forget need 2 piece unless you have another holder that stick to printer then you just need one. Special design for M8 threaded screw.

Update on 1st June 2016: prefer with a washer will make it more prefect. total summary: 2 printed part, 2 washer, 2 nuts. that's prefect and just update the picture. no more worry. :)