FRITSCH PULVERISETTE 1, Model I premium line - Manual (Page 29)

6. To do this, insert the lug of the threaded spindle (b) in the hole of
the pull plate.
7. Place the threaded spindle (b) with the cone in the bearing lifting
system.
8. Now push the crank (a) on to the brass square of the threaded
spindle (b).
Working with the laboratory jaw crusher
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