Page 349 - Rollingbearings

Designs and variants
Cages • are intended to dampen vibration and
noise
SKF insert bearings are itted as standard • are intended to enable the bearings to be
with a snap-type, glass ibre reinforced PA66 displaced slightly in their housings to
cage (ig. 26), no designation sufix. accommodate minor shaft expansion or
When used at high temperatures, some misalignment 2
lubricants can have a detrimental effect on • are located on the bearing outer ring and
polyamide cages. For additional information in the housing bore (ig. 28)
about the suitability of cages, refer to Cages, • are made of NBR
page 187. • can withstand temperatures ranging from
–30 to +100 °C (–20 to +210 °F)

Rubber seating rings are available as an
Rubber seating rings accessory and must be ordered separately
However, insert bearings in the YET 2 series
• are available in the RIS 2 series (ig. 27, can be supplied with the seating ring already
table 1) itted (ig. 29) These products are identiied
• can be itted on all SKF insert bearings, by the series preix CYS, followed by the
except for those with a standard inner ring bearing bore diameter and the bearing
(17262 and 17263 series) identiication sufix FM, e g CYS 20 FM is a
• are primarily intended to “cushion” insert YET 204 bearing with a 20 mm bore, itted Fig. 28
bearings in pressed steel plummer block with an RIS 204 rubber seating ring Rubber seating ring, located between
housings bearing and housing

Table 1
Rubber seating rings
C
B

D 1 d 1 d 2

Insert bearing Rubber seating ring Fig. 29
Outside Size Designation Dimensions Mass
diameter Bearing in the YET 2 series with rubber
D D 1 d 1 d 2 B C seating ring (CYS .. FM)

mm – – mm g

40 03 RIS 203 47,3 35,5 39,8 12 18 12
47 04 RIS 204 52,3 41,2 46,8 14 19 11,5

52 05 RIS 205 62,3 46,4 51,8 15 20,5 26,5
62 06 RIS 206 A 72,3 54,6 61,8 18 21,5 31
72 07 RIS 207 A 80,3 63,7 71,8 19 23 32
80 08 RIS 208 A 85,3 70,7 79,7 21 24 26

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