SITI GEARBOX

Specification of SITI GEARBOX

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