Beginning with these considerations, we have a gearbox with a electric motor mounting flange that’s separable from the casing which incorporate the essential oil seal; in this way we avoid any risk of damaging the oil seal in the event of alternative of the insight flange and the O-Ring can be eliminated.
All the apart covers, swinging and 
with feet, have O-Rings rather than traditional flat gaskets.
The sizes 03-04-05 permit the rotation of your toes without disassembling them; furthermore the variations with swinging apart covers allow the lateral flanges to be fitted on both sides with simple fixing screws.
The worm screw has a ZI involute profile: with this worm-wheel coupling we shall get a much better performance with a temperature reduction.
The gearboxes and motors are painted with RAL 9022 aluminium colour epoxy powder to safeguard the parts from oxidation and against micro-blowholes that can come during the pressure of die-castings.
The CHPC pre-stage gears (already present in the catalogue of CHM) may also be worm gear unit mounted with this range, finding a gear ratio up to 1 1:300. For bigger reductions is possible to have two gears collectively using a proper kit