Origin	China
Brand Name	TONGFA

1) MANUFACTURING RANGE
Basic symbol d D H 
81109 - 81117 45 - 85 65-110 14-19
81209 - 81240 45-200 73-240 20-62 
2) DESIGN TYPES - Single - row rolling elements; - Multi - row rolling elements; - Unstandardized constructive types.

3) TECHNICAL EXECUTION CONDITIONS

a) DIMENSIONS The boundary dimensions according to ISO 104.

b) TOLERANCE CLASSES P0 and P6 according to ISO 199.

c) The basic load ratings are established in accordance with ISO 76 and ISO 281.

4) CAGE TYPES Machined window - type brass cage.

5) APPLICATIONS

a) ENGINEERING MACHINE INDUSTRY - gear boxes and reductors - fans

b) METAL- WORKING INDUSTRY - rolling and drawing equipments

c) CHEMICAL INDUSTRY

d) MINING INDUSTRY - drilling machines and equipments.

6) SUGGESTIONS

a) MISALIGNMENT

Cylindrical roller thrust bearings do not permit any angular misalignment between shaft and housing nor any errors of alignment between the support surfaces in the housing and on the shaft.

b) MINIMUM AXIAL LOAD

We suggest the minimum axial load to be applied, in such cases can be estimated from Fa min = A(n/1000)2, [KN]where: n = speed, [r/min] A= minimum load factor (see bearing tables)

c) RUNNING TEMPERATURES The limit operation temperature depends on the oil used at the bearing lubrication and not exceed 2000C.