Page 676 - Rollingbearings

8 Tapered roller bearings
Optional TDI design bearings Features
composed of four-row tapered (TDO → ig. 17, TDI → ig. 18) XD Outer ring with lubrication holes
(TDO)
roller bearing components C Outer ring with blind hole to prevent, Y Bearing without intermediate ring
together with a cylindrical pin, the between the outer rings
On request, TDI design bearings with dimen- outer ring from turning in its seat Y2 Intermediate ring with annular groove
sions different from those listed in the TDI D Outer ring with annular groove and and lubrication holes between the
design product table can be specially created lubrication holes (TDO), inner ring outer rings (TDI)
as tailored double row bearings using stand- with annular groove and lubrication Z Sheet steel shield on both sides
ard components of SKF four-row tapered holes (TDI)
roller bearings in the TQO design, but with- D0 Outer ring with annular groove and
out intermediate rings (TQO design, lubrication holes, without intermedi-
skf com/go/17000-8-9). For example, it is ate ring between the inner rings
possible to combine standard components D2 Outer ring with annular groove and
as follows (ig. 16): lubrication holes, intermediate ring
with lubrication holes or lubrication
• two single row outer rings (cups) grooves between the inner rings
• one double row inner ring (double cone) D3 Outer ring with annular groove and
• two roller and cage assemblies lubrication holes, intermediate ring
with annular groove and lubrication
This option may be advantageous as regards holes or lubrication grooves between
both price and delivery time and should be the inner rings
considered if sealed double row bearings are G Helical groove in the inner ring bore
required, although this will require a N Two locating slots (notches) at 180° in
non-standard inner ring. For details about one side face of the inner ring
this option, contact the SKF application N1 One locating slot in each side face of
engin eering service. the inner ring, at 180° to slot in
oppos ite side face
N2 Two locating slots at 180° in both side
Variants/features faces of the inner ring, at 90° to slots
in opposite side face
SKF manufactures TDO and TDI design TN9 Glass ibre reinforced PA66 cage
bearings in many variants and with different V Contact seals on both sides
features. Bearing-related design variants W Lubrication grooves in the side faces
8 and features are identiied in the product of the bearing rings
tables, page 762, under Design variant/ WI Lubrication grooves in the side faces
feature. For other sizes, design variants or of the inner ring(s)
feature combinations not listed in the prod- WO Lubrication grooves in the side faces
uct tables, contact SKF. Design variants and of the outer ring(s)
features are identiied by the following char- X Bearings with retention sleeve with
acters within designation sufixes: annular groove and lubrication holes
over the outer rings (TDI, replaced by
Design variants design variant .2)
E Extended inner ring
N Without intermediate ring
S Steep contact angle α Fig. 16
T Tapered bore, taper 1:12 Composition of bearing components
.1 Steel pin-type cages and pierced
rollers
.2 Retention sleeve over the outer rings Cups

Double cone

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