Industrial seal self study guide - SKF.com

Two styles of large diameter wear sleeves are available.
Style 3
Style 3 is designed with a flange for final positioning on the shaft
(fig. 6j). Actual sealing surface width is .250” (6.4mm) narrower than
overall sleeve width.
Style 4
Style 4 is designed without a flange (fig. 6k). It is used where space
restrictions limit the width or prohibit the use of a flange.
Large Diameter Wear Sleeve Installation
Large diameter wear sleeves are designed for heated, slip-fit
installation. A bearing heater (either hot air, hot oil or electric induction)
is used to bring the sleeve to about 350°F (176°C). Even with heating,
the sleeve may not position itself correctly and would then require
pushing or pulling on the flange.
While a large diameter wear sleeve will increase shaft life and eliminate
leaks, it also increases the shaft diameter. When considering seals and
sleeves for a large shaft, choose one of two options:
• Machine the shaft before installing the sleeve to .188”
(4.8mm) under original size. The resulting sleeve O.D. will
allow use of the original size seal.
• Increase the seal size. No shaft machining is required.
Use seals designed for shafts .188” (4.8mm) larger than
the original.
LDSLV3
Style 3 features a flange for
pull-on installation (fig 6j).
LDSLV4
Style 4 is ideal where space
prohibits use of a flange (fig. 6k).
6
D.
Original Option I Option II
14.000”
B.
A.
C.
Shaft 11.812”
Seal no.
1181640
Seal no.
1200560
Seal no.
1181640
11.812” Sleeve Shaft 12.000” 11.625” Sleeve Shaft 11.812”
Style 3
Sleeve
Style 4
.094” .094”
Sleeve
With flange
Without flange
Unlike Speedi-Sleeve, adding an LD sleeve requires either reducing the shaft
diameter to compensate for the sleeve thickness or using a different seal sized
for the nominal sleeve outer diameter.
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