Industrial gear mechanism

An assembly, comprising a plurality of industrial bevel gear mechanisms, each comprising:

• a bevel gear stage comprising at least one bevel gear and a bevel pinion in engagement with the at least one bevel gear,
• a gear mechanism housing surrounding the at least one bevel gear and the bevel pinion, said gear mechanism housing comprising bearing seats supporting a bevel gear shaft and a bevel pinion shaft,
• a first and second bevel pinion shaft bearing in an O-shaped arrangement, wherein the first bevel pinion shaft bearing is arranged on a first end of the bevel pinion shaft facing the bevel pinion, and wherein the second bevel pinion shaft bearing is arranged on a second end of the bevel pinion shaft remote from the bevel pinion,
• a spur gear stage on a drive side comprising a gearwheel arranged axially between the first and second bevel pinion shaft bearings, said gearwheel being connected with a rotation lock to the bevel pinion shaft and in engagement with a drive pinion of the spur gear stage, wherein the gearwheel is configured for insertion into the gear mechanism housing through a housing opening on the drive side, and wherein a bearing seat associated with the second bevel pinion shaft bearing is accessible via the housing opening on the drive side,
• a threaded bore disposed on the second end of the bevel pinion shaft, said threaded bore extending coaxially with the bevel pinion shaft, wherein the threaded bore is freely accessible via the housing opening on the drive side, and
• a bearing adjusting screw inserted into the threaded bore, said bearing adjusting screw being axially tightened against a surrounding washer, with a front face of the surrounding washer bearing against an inner bearing ring of the second bevel pinion shaft bearing;
• wherein the plurality of the bevel gear mechanisms include a first group of several bevel gear mechanisms all having one same number of stages and all having different sizes compare to each other, and also a second group of several bevel gear mechanisms all having another same number of stages which is different from the number of stages of the bevel gear mechanisms of the first group and also all having different sizes compare to each other.