Starting from these considerations, we have a gearbox with a motor mounting flange that is separable from the casing which incorporate the oil seal; in this manner we avoid any threat of damaging the essential oil seal in case of substitute of the input flange and the O-Ring can be eliminated.
All the 
aside covers, swinging and with ft, have O-Rings instead of traditional flat gaskets.
The sizes 03-04-05 permit the rotation of your feet without disassembling them; furthermore the variations with swinging aside covers allow the lateral flanges to become installed on both sides with basic fixing screws.
The worm screw has a ZI involute profile: with this worm-wheel coupling we shall get a better performance with a temperature reduction.
The gearboxes and motors are worm gear unit painted with RAL 9022 aluminium colour epoxy powder to protect the parts from oxidation and against micro-blowholes that may come through the pressure of die-castings.
The CHPC pre-stage gears (already within the catalogue of CHM) can also be mounted with this range, obtaining a gear ratio up to 1 1:300. For bigger reductions is possible to possess two gears jointly using a proper kit
