Promotech BM-16 Operator's Manual page 9

Adjust the gap between the roller and the cutting inserts every time you replace the
milling head. Place all unused washers between the pivot pin and the roller.
To remove the milling head, loosen the clamping screw (1, Fig. 4), and then
unscrew the sleeve (2) and remove it (3). Next, press and hold the button 4, and then
use the 5 mm hex wrench (5) to unscrew the roller, and remove it (6). Lock the
spindle with the 32 mm flat wrench (7, do not use the spindle lock button 4 because
this may damage the machine), and then use the 14 mm hex wrench to unscrew the
head (8), and remove it (9).
Copying, using, or distributing without permission of PROMOTECH is prohibited.
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Fig. 4. Removing the milling head
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