AKAI "late" series pinch roller
Roller fits GX635 and a lot of the other AKAI models with rollers 36-37mm, see it's dimensions:
Solid bronze bearing* = "precision" series

Outer diameter 37mm
Sliding bearing hole 5.92+-0.01 (reamer 5.9 H7) **
Bearing lenght 16.8+0.05mm
Rubber width 10+0.5mm, rubber hardness 55 Shore
Bearing tail lenght 9.5+0.4mm
Working surface finished with roller placed in the lathe cone centers to achieve the less wobbing and maximal coaxiality

* Have to be lubricated with oil periodically

** AKAI recorder's roller axle normally have diameter in 5.9mm+0.01 and a lot of other, chinese-made, rollers with 6.0mm hole will give you much more vibration and wobbing level) Please re-check real axle diameter before purchase.

We combine postage. Postage cost could be adjusted to low side - just ask question about actual cost of delivery to your destination
USA-located buyers please ask question about actual postage cost before buying