Page 675 - Rollingbearings

Designs and variants
Table 2
TDI design variants and characteristics
Design variant Characteristics

TDI • intermediate ring between two outer rings
• steel window-type cages

TDI.1 • intermediate ring between two outer rings
• steel pin-type cages (pierced rollers) for higher loads

TDIE • intermediate ring between two outer rings
• steel window-type cages
• inner ring extensions at both sides
– extensions are ground as counterface for seal lips

TDIT • intermediate ring between two outer rings
• tapered bore, taper 1:12
• steel window-type cages

TDIS • steep contact angle α
• for applications where high axial loads in combination with radial loads occur
• intermediate ring between two outer rings 8
• steel window-type cages
• used in rolling mill applications with a loose it on the roll neck and only
subjected to purely axial load
• the inner ring has one or more locating slots (notches) in one or both side faces to prevent
it from turning on its seat
• depending on the application, the bearings can be supplied with or without
an intermediate ring between the two outer rings

TDIS.1 • steep contact angle α
• for applications where high axial loads in combination with radial loads occur
• intermediate ring between two outer rings
• steel pin-type cages (pierced rollers) for higher loads

TDIS.2 • self-retaining unit with a retention sleeve over the outer rings
• the outer rings are pressed into the sleeve
• the deformation of the outer rings normally resulting from heavy axial
loads is considerably reduced
– as a consequence, the stress distribution in the rolling contacts is more
favourable and extends bearing service life
• the axial internal clearance is determined by the sleeve
• preloading by means of springs is unnecessary
• steep contact angle α
• for applications where high axial loads in combination with radial loads occur
• the simpliied and economic design facilitates mounting, dismounting and
also maintenance inspection routines

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