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 limited tolerances, making a product which will remain reliable over time. The organizations are constructed with aluminium casings from sizes 025 to 090, as the sizes 110, 130 and 150 are manufactured from cast iron. All the bodies are painted with RAL 9022 aluminium colour to safeguard the parts from ageing and also to give better protection against microblowholes which may be within the aluminium. The gears are given at least one filling plug that’s also used during screening to check for possible 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 can be found to pair with the gears; they are also built in aluminium and so are painted like the worm gears
Gears that are supplied with mounting flanges must 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 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 CHM – WORM GEARED MOTORS AND WORM GEAR UNITS electric motor connection flange are demonstrated in the following table. Remember that, as the electric motor connection flanges are separate from the body it is also possible to possess a shaft / flange combination that will not correspond to the table, e.g. 19/140, thereby offering adaptability for other non-unified models like the brushless or immediate current types.