Single reduction axle (SR)
Hub reduction axle (HR)
Single portal axle (SP)
Single reduction tandem axle (SRT)
Hub reduction tandem axle (HRT)
Same inner axle housing geometry between differential bearings and horizontal plane of centre of pinion shaft according to drawing specification (Exception for single portal axles (SP)). Geometry changes due to an optional integration of a differential lock are permitted within the same axle family. In case of mirror inverted axle casings of axles, the mirror inverted axles can be combined in the same axle family as the origin axles, under the premise, that the bevel gear sets are adapted to the other running direction (change of spiral direction).
Crown wheel diameter (+ 1,5/– 8 % ref. to the largest drawing diameter)
Vertical hypoid offset pinion/crown wheel within ± 2 mm
In case of single portal axles (SP): Pinion angle with respect to horizontal plane within ± 5°
In case of single portal axles (SP): Angle between pinion axle and crown wheel axle within ± 3,5°
In case of hub reduction and single portal axles (HR, HRT, FHR, SP): Same number of planetary gear and spur wheels
Gear ratio of every gear step within an axle in a range of 1, as long as only one gear set is changed
Oil level within ± 10 mm or oil volume ± 0,5 litre referring to drawing specification and the installation position in the vehicle
Same oil type viscosity grade (recommended factory fill)
For all bearings: same bearing rolling/sliding circle diameter (inner/outer) and width within ± 2 mm ref. to drawing
Same seal type (main diameters, oil lip number) within ± 0,5 mm ref. to drawing