The worm gears created by EP are square and are considerably versatile for installation. The machining of the components, completed using numeric control devices, guarantees optimum precision for the limited tolerances, producing a product that may remain reliable over time. The groups are constructed with aluminium casings from sizes 025 to 090, while the sizes 110, 130 and 150 are produced from cast iron. All of the bodies are painted with RAL 9022 aluminium color to safeguard the parts from ageing and to give better safety against microblowholes that may be present in the aluminium. The gears are given 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 in order to obtain high gear ratios. Four sizes of CHPC pre-stage gears can be found to set with the gears; these are also constructed in aluminium and are painted just 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 vibration and forcing of the input bearing. Motors supplied by Chiaravalli Group S.p.A. guarantee that this necessity is fulfilled. For ease of consultation, the correspondence of the size of the B5 and B14 motor with the sizes of the shaft and the engine connection flange are demonstrated in the next table. Remember that, as the electric motor connection flanges are CHM – WORM GEARED MOTORS AND WORM GEAR UNITS individual from the body additionally it is possible to get a shaft / flange combination that does not match the table, electronic.g. 19/140, therefore offering adaptability for other non-unified models such as the brushless or immediate current types.