Fostex R8 plastic capstan pulley
There are still thousands of Fostex R8,s out there I am surprised by how many of these machines they sold but for trying music out at home or away they was very popular simply because of their portability
The reel cogs/Gears go on them all the time as were just pressed plastic, this is because of use or more often old sticky tape or people using the thicker studio tape which the machine was not designed for, many of these machine have been dumped over the years simply because of this item.
One man was making some with 3D printing but it was not very reliable same situation with other plastic pulleys pressed into service from robotic and printer spare parts.
This is the capstan pulley I will be making these later from aluminiun as these fail and break in the R8, they can also slip, I had one spare but would recommend gluing it in with epoxy or it can slip they was a one time pus on and forget item