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[ame=http://youtu.be/3ruVrrRK6ak]Shaft diameter - 7.00 mm or more? - YouTube[/ame]For choosing a right Tomba (Tomba700, Tomba715...) it is very important to know the exact shaft diameter. It is not same if the shaft is 7.0 mm or 7.15 mm.
Here is a trick how can one easily take a measure of a shaft diameter without a caliper. I suppose it is clear from the picture how to make a tool and how to use it.
Im sure i have missed it somewhere but i would like to know what the plastic seal or slide is made from.