Page 245 - Rollingbearings

Designs and variants
Shields (designation sufixes Z or ZS) Non-contact seals (designation sufix RZ)
RSL design (ig. 8): 1
• are primarily intended for applications • provide better sealing effectiveness than
where the inner ring rotates shields • can be operated at the same speeds as
• are itted in the outer ring and form a nar- • can be operated at the same speeds as shields
row gap with the inner ring shields • make virtually no contact with a recess in
• are made of sheet steel, or stainless steel • form an extremely narrow gap with the the inner ring shoulder
for stainless steel bearings inner ring shoulder (ig. 7) • are available for 60, 62, 63 series bearings
• protect from dirt and debris without fric- • are made of sheet steel reinforced NBR in two designs, depending on the size
tion losses (oil- and wear-resistant)
• are supplied in different designs (ig. 6): RST design (ig. 9):
– with designation sufix Z: either with (a) Low-friction seals (designation sufixes
or without (b) an extension in the shield RSL or RST) • make positive contact with a recess in the
bore or on some stainless steel bear- • provide better sealing effectiveness than inner ring shoulder for good sealing
ings, the shield bore can extend into a non-contact seals effectiveness
recess in the inner ring (c) • are made of sheet steel reinforced NBR • are available on request for 60, 62 and 63
– with designation sufix ZS (stainless (oil- and wear-resistant) series bearings in three designs, depending
steel bearings only): ixed in the outer on the size
ring by a retaining ring and may extend
into a recess (d)
– available on request for stainless steel
bearings only: shields made of PTFE

Fig. 6 Fig. 7
Shields Non-contact seal

a b c d

Z Z Z ZS
RZ

Fig. 8 Fig. 9
Low-friction seals, RSL Low-friction seals, RST

D ≤ 25 mm 25 < D ≤ 52 mm
D ≤ 25 mm 25 < D ≤ 70 mm D > 70 mm

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