Norton Abrasives C6136, C3120 C. Bearings, Bearing Location, Shaft Size, Maximum Grease in Ounces

C. Bearings

All of the bearings on Norton Saws are equipped with a hydraulic grease fitting (known as a grease zerk) for the easy of re-lubrication. The proper amount of lubrication in the bearing is extremely important. Both excessive and inadequate lubrication may cause a bearing failure. The bearings should be greased while they are rotating (if it is safe to do so), the grease should be pumped into the zerk slowly until a slight bead forms around the seats. (NOTE: The bearings are pre-lubricated at the factory and will not need re-lubricated until one of the time-conditional variables in the chart under the section Frequency of Lubrication is meet). This bead in addition to acting as an indicator of adequate grease levels and it provides additional protection against the entry of foreign matter in to the bearing and helps to flush out contaminates in the bearing. By the time the slight grease bead is formed the bearing’s internal temperature will rise as much as 30° F.

Use only Lithium soap grease which is compatible with multi-purpose grease which conforms to NLGI Grade 2 consistency. The temperature range of the factory grease is -30° F to +250° F (-34.4° C to 121° C)

Bearing Location	Shaft Size	Maximum Grease in Ounces
Transmission Jackshaft	3/4”	0.03 oz
Front Axle, Rear Axle	1-1/4”	0.15 oz
Blade Shaft	2”	0.30 oz

Frequency of Lubrication

The frequency of lubrication depends on the operating conditions of the bearing. The bearing operating temperature is the best index for determining a lubrication interval. Use the following chart to determine the best re-lubrication (greasing) interval for your machine based on bearing operating temperature and operating conditions.

Speed (RPM)	Temperature	Condition
500 RPM	Up to 125° F (52° C)	Clean
1,000 RPM	Up to 150° F (66° C)	Clean
1,500 RPM	Up to 210° F (99° C)	Clean
Any Speed	Up to 150° (66° C )F	Dirty
Any Speed	Over 160° F (70° C)	Dirty
Any Speed	Any Temperature	Very Dirty
Any Speed	Any Temperature	Extreme Conditions

Greasing Interval

2months

2weeks Weekly

1Week to 1 Month Daily to 1 Week Daily to 1 Week Daily to 1 Week

Too much grease will damage the bearing seals and will cause the bearing to fail. Large amounts of grease on the bearing seal is a sign of too much grease and possible seal failure.

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