Standard seals for SDAF and SDAF extended range pillow block housings


Seal
Type	Labyrinth	PosiTrac	PosiTrac Plus	Contact	Taconite	Taconite (V-ring seal)	Bolt-on taconite split	End plug
Designation	LER, ERF	LOR	LOR with B-10724	B-9784	TER	TER V	_²⁾	EPR, X 5217
Material	aluminum or steel	aluminum, nitrile rubber	aluminum, nitrile rubber	nitrile rubber	steel, felt, nitrile rubber	steel, felt, nitrile rubber	cast iron, steel, nitrile rubber	steel, nitrile rubber

Application conditions and requirements
Temperature [°F]	–30 to 300	–30 to 220	–30 to 220	–30 to 220	–30 to 220	–30 to 220	–30 to 220	–30 to 220
Max. circumferential speed	same as bearing	same as bearing	limited¹⁾	limited¹⁾	limited¹⁾	limited¹⁾	limited¹⁾	n/a
Misalignment [°]	0,3	0,3	0,3	0,1	0,1	0,5	0,5	n/a
Low friction	++	++	+	–	––	––	––	n/a
Axial shaft displacement	++	+	–	+	+	–	–	n/a
Vertical shaft arrangement	–	–	++	++	++	++	++	++
Grease relubrication	+	+	+	+	++	++	++	n/a
Oil lubrication	–	–	++	++	+	+	+	++
Replacement	+	+	+	+	+	+	+	+

Sealing suitability
Dust	–	–	+	+	++	++	++	+
Fine particles	–	–	+	+	++	++	++	+
Coarse particles	+	+	+	+	++	++	++	+
Chips	+	+	–	–	++	++	++	–
Liquids when sprayed	––	––	–	–	+	+	+	+
Direct sunlight	+	+	+	+	+	+	+	+

Symbols: n/a not applicable ++ very suitable + suitable – limited suitability –– unsuitable

1) For speed limits for SDAF housings, refer to table. For speed limits for SDAF extended range housings, refer to table.
2) For more information, contact the SKF application engineering service.

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