The worm gears created by EP are square and are considerably versatile for installation. The machining of the elements, carried out using numeric control devices, guarantees optimum precision for the limited tolerances, creating a product that may remain reliable as time passes. The groups are constructed with aluminium 
casings from sizes 025 to 090, while the sizes 110, 130 and 150 are made from cast iron. All of the bodies are painted with RAL 9022 aluminium colour to safeguard the parts from ageing and also to give better safety against microblowholes that may be present in the aluminium. The gears are supplied with at least one filling connect that’s also used during tests to check for feasible leaks. A connection flange enables two gears to become combined to be able to obtain high equipment ratios. Four sizes of CHPC pre-stage gears are available to set with the gears; these are also constructed in aluminium and so are painted just like the worm gears
Gears that are supplied with mounting CHM – WORM GEARED MOTORS AND WORM GEAR UNITS flanges should be assembled with motors whose shaft and flange tolerances correspond to a “normal course” of quality in order to avoid vibration and forcing of the input bearing. Motors given by Chiaravalli Group S.p.A. guarantee that this necessity is fulfilled. For simple consultation, the correspondence of how big is the B5 and B14 engine with the sizes of the shaft and the motor connection flange are proven in the next table. Remember that, as the electric motor connection flanges are separate from the body additionally it is possible to get a shaft / flange mixture that does not correspond to the table, electronic.g. 19/140, therefore offering adaptability for other non-unified models such as the brushless or immediate current types.
