Tapered Roller Bearings

DF Type Matched Tapered Roller Bearings

DF Type Matched tapered roller bearings are a common type of tapered roller bearings. Matched tapered roller bearings arranged face-to-face have load lines that converge toward the bearing axis. Therefore, the arrangement can accommodate a limited amount of misalignment. Axial loads in both directions can be adjusted, but only by one bearing in each order. The bearing set is supplied with an intermediate outer ring spacer. The suffix DF means two bearings matched for mounting face-to-face. A number immediately following the DF identifies the design of the ring spacer.

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DF Type Matched tapered roller bearings are a common type of tapered roller bearings. Matched tapered roller bearings arranged face-to-face have load lines that converge toward the bearing axis. Therefore, the arrangement can accommodate a limited amount of misalignment. Axial loads in both directions can be adjusted, but only by one bearing in each order. The bearing set is supplied with an intermediate outer ring spacer. The suffix DF means two bearings matched for mounting face-to-face. A number immediately following the DF identifies the design of the ring spacer.

Bearing Parameters

Bearing NO. Boundary dimensions
(mm)
Mass
(kg)
HEPT d D T B
30218/DF 90 160 65 5.15
30220/DF 100 180 74 7.7
30224/DF 120 215 87 13
30230/DF 150 270 98 22.5
31305/DF 25 62 36.5 0.55
31306/DF 30 72 41.5 0.85
31307/DF 35 80 45.5 1.1
31308/DF 40 90 50.5 1.5
31309/DF 45 100 54.5 2
31310/DF 50 110 58.5 2.6
31311/DF 55 120 63 3.3
31312/DF 60 130 67 4.1
31313/DF 65 140 72 5.05
31314/DF 70 150 76 6.15
31317/DF 85 180 89 10
31315/DF 75 160 80 7.25
31316/DF 80 170 85 8.75
31322/DF 110 240 126 26
31320/DF 100 215 113 18
31318/DF 90 190 93 11.5

Measurement requirements for matched tapered roller bearings:

  1.  When measuring the assembly height of a single set bearing and the axial clearance of the matched pair, each set bearing should be rotated to ensure that the rolling body of each set bearing is in evenly contact with the raceway and all parts of the bearings are in the correct position. If necessary, the bearing assembly height and axial clearance shall be measured under load, with 0.1 ~ 0.5kN.
  2. The measuring plate shall be kept in a horizontal position, the measuring instrument shall be fixed, and the measuring head shall be perpendicular. If the height variation of the same set of gaskets is less than 0.01mm, the instrument shall select a range of 0.001mm.
  3. Three points shall be evenly distributed along 120 degrees around the circumference during the measurement, and the arithmetic means value shall be taken as the actual measurement dimension.

Application DF type matched tapered roller bearings

DF Type matched tapered roller bearings are widely used in mining, petroleum, heavy machinery, wind power, engineering machinery, and other industries.