Norton Abrasives C6136 - Manual (Page 39)

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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 Greasing Interval
500 RPM Up to 125° F (52° C) Clean 2 months
1,000 RPM Up to 150° F (66° C) Clean 2 weeks
1,500 RPM Up to 210° F (99° C) Clean Weekly
Any Speed Up to 150° (66° C )F Dirty 1 Week to 1 Month
Any Speed Over 160° F (70° C) Dirty Daily to 1 Week
Any Speed Any Temperature Very Dirty Daily to 1 Week
Any Speed Any Temperature Extreme Conditions 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.