Fan Bearings

maintenance

Maintenance procedures

The opposite drive end bearing is a special bearing with close tolerance fit of balls and races. Replace this bearing with the same part number as the original bearing. Follow the fan bearing lubrication schedules inTables M-MP-1 and M-MP-2. UseTable M-MP-3 to reference compatible fan bearing grease for specific bearings.

Table M-MP-1. Baldor Fan Bearing Lubrication Schedule

Baldor	Rated Speed, rpm
Nema/ (IEC) Frame Size	3600	1800	1200	900
up to 210 incl. (132)	5500 hrs	12,000 hrs	18,000 hrs	22,000 hrs
over 210 to 280 incl. (180)	3600 hrs	9500 hrs	15,000 hrs	18,000 hrs
over 360 to 5800 incl. (300)	2200 hrs	3500 hrs	7400 hrs	10,500 hrs

Table M-MP-2.AO Smith Bearing Lubrication Schedule

Speed	Frame	Standard Service	Severe Service	Extreme
Service

Over 1800 rpm	All	6 mths	3 mths	3 mths
1800 rpm	140-180	3 yrs	1 yr	6 mths
	210-280	2 1/2 yrs	10 1/2 mths	5 1/2 mths
	320-360	2 yrs	9 mths	4 1/2 mths
	400-440	1 1/2 yrs	8 mths	4 mths

Note: Service standard - 8 hrs/day, normal to lgith loading, 100°F ambient temp. max.

Severe service - 24 hrs/day, shock loading, vibration, dirt or dust, 100 to 150°F ambient temp. Extreme service - heavy shock or vibration, dirt or dust, 100 to 150°F ambient temp.

Table M-MP-3. Compatible Fan Bearing Grease

Motor Vendor	Recommended Oil
AOSmith	ExxonPolyrexEM
	Chevron SRI 2
	Dolium R Grease
	Chevron Black Perl EP1
Baldor	ExxonPolyrexEM
	Texaco Polystar
	Rykon Premium #2
	Pennzoil Pen 2 Lube
	Chevron SRI

SCXG-SVX01B-EN

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