SITI GEAR BOX

Gearboxes provides with trains of gears at 2 or 3 stages of reduction: • On the “ OT” range: The two stages of reduction consist of one bevel gear pair with spiral Gleason toothing ( Duplex type) and one cylindrical final gear pair, with involute profile, accurately corrected in view of an improved strength; the three stages of reduction result from adding a further cylindrical helical gear pair, upstream of the other two stages, with accurately corrected involute profile in view of an excellent resistance to stresses. • On the PL and PD gearboxes, both the first and the second stage of reduction are accomplished with cylindrical helical gear pairs, with accurately corrected profiles. Even for these series of gearboxes, the third stage of reduction is obtained adding a further stage of reduction ( primary reduction) provided with a cylindrical helical gear pair with corrected profile. • They are manufactured in 5 sizes: 63 – 80 – 100 – 125 – 160 ( the number relevant to gearbox size means the center-to-center distance of the final reduction stage according to the Renard series R10) . Size 56 available for OT only. • The rated transmissible torques are included in the range from 100 Nm. to 4840 Nm. • Load capacities of toothing comply with DIN 3990, UNI 8862, AGMA 2001 B88 norms and the ISO 6336 draft proposal, both with the surface pitting resistance and the tooth root bending strength calculation, in view of an accurately balances and extremely high nominal life. • Input shafts, output shafts and intermediate shafts are all supported by taper roller bearings, in view of an improved adjustment of backlash and high strength to radial and axial loads