Teac 1/4 inch capstan roller arm assembly X-7 X-300 X-7 22-2 22-4 and many others it may well be the

it may well be the same on other Fostex models I have some E16 ones elsewhere listed they look mechanically the same but its a slightly heavier casting and maybe a mm taller so kept them apart

These have been professionally re-lapped and tested and guaranteed 100% ok with the test report has  two connector sockets

Movement guaranteed and checked before sending lamp not though its just the standard axial one

but its solid ali so shame to scrap it

Teac 1/4 inch capstan roller arm assembly X-7 X-300 X-7 22-2 22-4 and many others it may well be theUsed in the Teac X 7 though some of the parts may have been used in other 1 4 inch machines. You have to reface the peg but of course after a a few times your peg gets worn so this needs changing after some time.