O.M.G. has projected this serie of heads to offer an adequate solution to customer exigencies, as modularity, flexibility, possibility to reuse the pieces on other projects, easy maintenance.
The following heads can reach big dimensions, transmit high powers, equip big units, special machines with automatic change of the heads, high performance production lines.
Technical featuresThe body is normally in cast iron casting, but for particular exigencies, it is possible to have it in other materials.
The movement enters in the head from the central shaft, equipped by bearings with oblique contact at which end there is a central elical gear with rectified toothing; this transmit the movement to the conduit gears which rotate on radio-axial bearings, reach the spindles which are essentially of four types: internal, external, precision, lead screw.
The first two are according DIN 55058 norm and they have selected rolling bearings, radial and axial ball bearings to prefer if the drilling jig is necessary or in case of threading, when the requested precision is not too high; besides they can have distributors for the passing of the cooling liquid through the tool, quick connection collar or with other types of tool connection (KOMET, WELDON, HSK, etc.....).
The third type is composed by bearings with oblique contact and it is used in precision milling, boring, drilling operations with hard metal drills.
The main characteristic of these spindles is that they are a detached part of the head; all components are assembled on a rectified case in steel and then assembled on the head. This technique permits more rolling precision, more assembling precision and simpler maintenance.
The lubrication of the head is made by oil with a pump for an equal distribution of the lubricant to all pieces.
The drilling heads which require the tool guide jig can have both fix and movable columns; the drilling jigs are equipped with bushes DIN 173. The threading can be made with spindles with lead nut in case the machine is not with controlled feed; this solution has high costs and longer dimensions.
Before delivery, all our machines are dimensionally controlled on a machine type DEA JOTA 1202 in a controlled ambient at a temperature of about 20° and with a relative humidity of 50-60%.
ReferencesSince 1985 O.M.G. has manufactured over than 400 heads with this technique for different machine tool for world wide clients which thanks to their different enquiries have stimulated us to continuous development of this serie of heads.