The worm gears made by EP are square and are considerably versatile for installation. The machining of the components, completed using numeric control devices, guarantees maximum precision for the restricted tolerances, creating a product that may remain reliable over time. The organizations are constructed of aluminium casings from sizes 025 to 090, while the sizes 110, 130 and 150 are manufactured from cast iron. All of the bodies are painted with RAL 9022 aluminium color to protect the parts 
from ageing and to give better safety against microblowholes which may be present in the aluminium. The gears are supplied with at least one filling plug that’s also used during tests to check for possible leaks. A connection flange allows 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; they are also built in aluminium and are painted like the worm gears
Gears that are supplied with mounting flanges should be assembled with motors whose shaft and flange tolerances match a “normal class” of quality in order to avoid CHM – WORM GEARED MOTORS AND WORM GEAR UNITS vibration and forcing of the input bearing. Motors given by Chiaravalli Group S.p.A. guarantee that this requirement is fulfilled. For simple consultation, the correspondence of the size of the B5 and B14 motor with the sizes of the shaft and the electric motor 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 combination that does not correspond to the table, e.g. 19/140, therefore offering adaptability for additional non-unified models like the brushless or immediate current types.
