You can, of course, brush them, however this will not last long. More radical means of plastic washer embedded between the half-loops.
There is another way to get rid of the squeak. You need to shorten rod one half loop and put the loop inside a steel bearing ball.
Recommend to read
A CRANE WORKS ON THE PROGRAM
It is made by a group of engineering students laboratory in the Sverdlovsk House of pioneers named after Yuri Gagarin. Appearance of the crane shown in figure 1. On the frame beam crane...
RUBBER CUTTER
No one is surprised that for drilling different holes require different tools. The bit set can not do, does not matter. The trouble is that the tool change takes a lot of precious...
