The worm gears created by EP are square and are considerably versatile for installation. The machining of the components, carried out using numeric control machines, guarantees optimum precision for the restricted tolerances, making a product that may remain reliable as time passes. The groupings are constructed of aluminium casings from sizes 025 to 090, as the sizes 110, 130 and 150 are made from cast iron. All the bodies are painted with RAL 9022 aluminium color to safeguard the parts from ageing and to give better protection against microblowholes which may be within the aluminium. The gears are given at least one filling connect that is also used during testing to check for feasible leaks. A connection flange enables two gears to become combined to be able to obtain high gear ratios. Four sizes of CHPC pre-stage gears can be found to pair with the gears; these are also built in aluminium and so are painted like the worm gears
Gears that are supplied with mounting flanges CHM – WORM GEARED MOTORS AND WORM GEAR UNITS 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 insight bearing. Motors supplied by Chiaravalli Group S.p.A. guarantee that this necessity is fulfilled. For simple consultation, the correspondence of the size of the B5 and B14 electric motor with the sizes of the shaft and the engine connection flange are demonstrated in the next table. Understand that, as the engine connection flanges 
are individual from the body it is also possible to have a shaft / flange mixture that does not correspond to the table, electronic.g. 19/140, thereby offering adaptability for various other non-unified models such as the brushless or immediate current types.
