we’ve a gearbox with a motor mounting flange that is separable from the housing which incorporate the oil seal; in this manner we avoid any threat of damaging the oil seal in the event of substitute of the input flange and the O-Ring could be eliminated. All the aside covers, swinging and with ft, have O-Rings instead of traditional flat gaskets. The sizes 03-04-05 allow the rotation of the feet without disassembling them; furthermore the versions with swinging aside CH WORM GEARED MOTORS AND WORM GEAR UNITS covers permit the lateral flanges to be fitted 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 efficiency with a temperature reduction. The gearboxes and motors are painted with RAL 9022 aluminium color 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 within the catalogue of CHM) can also be mounted with this range, finding a equipment ratio up to 1 1:300. For bigger reductions is possible to have two gears collectively using a proper kit