Starting from these considerations, we’ve a gearbox with a engine mounting flange that’s separable from the housing which incorporate the essential oil seal; in this manner we avoid any threat of damaging the essential oil seal in the event of substitute of the input flange and the O-Ring can be eliminated.
All the apart covers, swinging and with foot, have O-Rings instead of traditional flat gaskets.
The sizes 03-04-05 permit the rotation of the feet without disassembling them; furthermore the variations with swinging aside covers permit the lateral flanges to be installed on both sides with basic fixing screws.
The worm screw includes a ZI involute profile: with this worm-wheel coupling we will get a much better worm gear unit performance with a temperature reduction.
The gearboxes and motors are 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 present in the catalogue of CHM) can also be mounted with this range, obtaining a gear ratio up 
to at least one 1:300. For larger reductions is possible to have two gears together using a proper kit
worm gear unit
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