HIGH/LOW TEMPERATURE UNITS




High / Low Temperature Series (suffix codes - High temperature:D1K2 & D9K2 Low temperature: D2K2)
For applications that require bearing units to be used at a higher or lower temperature range than our standard models FYH offers several options. For high temperature units that require lubrication please specify D1K2 as a suffix to the standard part number. For high temperature units that do not require lubrication specify D9K2. The D9K2 insert uses a fluoro-grease that allows for excellent heat resistance and operation with minimal maintenance. Specifications for the high temperature and low temperature units are shown in Table.

Specifications of High / Low Temperature Series
Category Special code Operating temperature range Grease Seal rubber material Bearing internal clearance
(ºC) (ºF) UC type UK type
Standard - −20 to 100 −4 to 212 FYH Lithium Bearing Grease
(lithium complex soap)
Nitrile CN C3
Cold resistant D2K2 −50 to 120 −58 to 248 SH33M (lithium soap) Silicone CN C3
Heat resistant D1K2 −40 to 180 −40 to 356 U-RET EDM-1 (diurea) Silicone C4 C5
Heat resistant D9K2 −20 to 230 −4 to 446 Demnum L-200 (fl uorinated grease) Silicone C4 C5


Specifications of Extreme High Temperature Series
Category Special code Operating temperature range Grease Seal rubber material Bearing internal clearance
(ºC) (ºF) UC type UK type
Heat resistant D9K6S6Y2 −20 to 230 −4 to 446 Demnum L-200 (fluorinated grease) Fluoroelastomer C4 -
Heat resistant D9P4S6Y2 −20 to 260 −4 to 500 Demnum L-200 (fluorinated grease) - C4 -
Extreme heat resistant S6Y3 300 to 450 572 to 842 Solid graphite lubricant - Special -


Grease schedule of ball bearing units
Operating temperature, ºC Grease Intervals Bearing used Grease supplied
Over Incl. Substantially clean Excessive dust Excessive dust and moisture


50
70
50

70
100
(3 months)
not necessary
1 year
6 months
(2 months)
1 year
4 months
2 months
(1 month)
4 months
1 month
2 weeks
(Low temperature D2K2)1)
Standard bearing
SH33M,
FYH Lithium Bearing Grease
100
120
150
120
150
180
2 months
2 weeks
1 week
2 weeks
5 days
2 days
5 days
2 days
1 day
High temperature
D1K2
U-RET EDM-1

        Note 1) Greasing intervals in parentheses are applicable to low temperature grease (D2K2).
        Remark Greasing intervals shown in this table are applicable to a unit operated for 8 to 10 hours per day.
                    If the time of operation is greater than this range, then a more frequent greasing interval must be specified. For example, if the unit
                    is operated 16 to 20 hours per day, then the greasing interval must be twice as frequent.