Bike pedals used to put a metal screw cap to protect the bearings from contamination. Now, instead, use the plastic plugs, which are often lost. Rescue plastic or nylon tubes from medical bubbles. Such substitutes being kept quite steady.
Recommend to read
CITY BUS ZIS-155
The replacement of the ZIS-154 was simpler to manufacture, but less capacious 8-foot ZIS-155 (June 26, 1956-ZIL-155), the design which used the elements of the body of the ZIS-154, and...
START of CLASS A1
The unusual design of bearing areas — that is the main distinguishing feature of the proposed model glider. Their advantage in ease of manufacture. The absence of cut from the sheet...
