Page 464 - SKF-bearing-housings

Split pillow blocks SDAF series including the extended range (inch dimensions)

Table 3
Seal chart for SDAF extended range housings
Shaft d a d a d a Labyrinth seal 1) Taconite seal 2) End plug
diameter 230(00) 231(00) 232(00) Ring seal with contact with V-ring Speed
Series Series Series seal seal limit
in. – – – r/min. –

8 15 /16 3248 KA* 3) ERF-914 TER-914 TER-914 V 280 X-5217-25
9 3248 KA ERF-828 TER-828 TER-828 V 280 X-5217-25
9 7 /16 3152 KA* 3) 3252 KA* 3) ERF-891 TER-891 TER-891 V 275 X-5217-53
9 1 /2 3152 KA 3252 KA ERF-842 TER-842 TER-842 V 275 X-5217-53
9 15 /16 3156 KA ERF-845 TER-845 TER-845 V 270 X-5217-35
14 3076 KA 3176 KA ERF-876 TER-876 TER-876 V 215 X-5217-12
14 15 /16 3080 KA* 3) ERF-882 TER-882 TER-882 V 200 –
14 15 /16 3180 KA* 3) 3280 KA* 3) ERF-976 TER-976 TER-976 V 200 –
15 3080 KA* 3) ERF-847 TER-847 TER-847 V 200 X-5217-21
15 3 /4 3084 KA* 3) ERF-969 TER-969 TER-969 V 185 X-5217-23
15 3 /4 3184 KA* 3) 3284 KA* 3) ERF-907 TER-907 TER-907 V 185 X-5217-5
16 1 /2 3088 KA* 3) 3188 KA* 3) 3288 KA* 3) ERF-958 TER-958 TER-958 V 180 –
17 3092 KA* 3) 3192 KA* 3) ERF-838 TER-838 TER-838 V 175 X-5217-48
18 3096 KA* 3) 3196 KA* 3) ERF-888 TER-888 TER-888 V 170 –
18 1 /2 230/500 KA* 3) ERF-978 TER-978 TER-978 V 170 –
19 1 /2 230/500 KA* 3) ERF-926 TER-926 TER-926 V 165 –

* = Standard shaft diameter, all others are optional shaft diameters
1) Speed rating same as bearing speed rating
2) Bolt-on taconite seals should be used when taconite seals in the TER series are not available.
3) Contact the SKF application engineering service to review alternative optional shaft diameters as special machining of housing
labyrinth grooves may be required.
Labyrinth rings with an internal contact • Seals in the TER series include a split radial
element shaft seal made of NBR.
PosiTrac Plus seals consist of a PosiTrac laby- • Seals in the TER-V series include a V-ring
rinth ring (designation LOR) and a contact ele- seal.
ment made of acrylonitrile-butadiene rubber
(NBR). The labyrinth ring is located on the shaft To further protect against the ingress of con-
and held in place by an O-ring. The contact taminants, SKF taconite seals have a grease
element is located in the seal groove in the fitting to purge old grease and any trapped
housing. It can be mounted either for best contaminants from the seal cavity, through
contaminant exclusion or for best lubricant the outboard seal.
retention († fig. 5). When the contact element Taconite heavy-duty seals are available for
is mounted for best contaminant exclusion, all smaller SDAF housings, but not all housings
the sealing effect can be enhanced by filling in the extended range.
the seal cavity with grease. The designation
for the contact element is B 10724 followed by Bolt-on taconite seals
a size code, for example B 10724-122. Bolt-on taconite seals consist of a split cast
iron auxiliary cover, a split radial shaft seal, a
grease fitting and all mounting hardware.
Taconite heavy-duty seals Bolt-on taconite seals were developed to
Taconite seals consist of an inboard felt seal, a accommodate the SDAF extended range hous-
grease cavity and an outboard seal that is ing and provide the equivalent sealing protec-
available in two designs († fig. 4, page 454): tion as the other taconite heavy-duty seals.
All bolt-on taconite seals are custom manu-

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