Simplicity ® Linear Plain Bearings
*Self Aligning O.D. (FMA-XX)
Standard O.D. (FM-XX)
HA
JA
B2 B
A
JB
HB
H C
J C
* Except for the O.D., bearings with the self-aligning feature have the same dimensions and tolerances as the standard bearing. There is a spherical crown on the O.D. to create the self-aligning feature. They are for use in a straight bore housing. Add an “A” to the part number for self-aligning bearings.
DIMENSIONAL INFORMATION
Precision I.D. Series Similar to Preloaded Ball Bearing
Compensated I.D. Series Similar to Standard Ball Bearing
B
B2
Nominal Size
A Bearing I.d. F8
A Bearing I.d.
C Length
Bearing Weight
Self-Aligning O.D. FMA
Part No.
Part No.
Standard O.d. H7
Concentric
Closed
Open
mm MIN MAX Closed Open
MIN MAX MIN MAX MIN MAX MIN MAX MAX mm Kg.
FM 05 FMN 05 5 FM 08 FMN 08 8
5.010 5.028 FMC 05 FMCN 05 5.060 5.078 11.982 12 11.941 11.966 21.619 22 0.0254 0.004
8.013 8.035 FMC 08 FMCN 08 8.063 8.085 15.982 16 15.941 15.966 24.619 25 0.0254 0.009 FM 10 FMN 10 10 10.013 10.035 FMC 10 FMCN 10 10.063 10.085 18.979 19 18.938 18.964 28.619 29 0.0254 0.014 FM 12 FMN 12 12 12.016 12.043 FMC 12 FMCN 12 12.066 12.093 21.979 22 21.938 21.963 31.619 32 0.0254 0.017 FM 16 FMN 16 16 16.016 16.043 FMC 16 FMCN 16 16.066 16.093 25.979 26 25.938 25.964 35.619 36 0.0254 0.028 FM 20 FMN 20 20 20.020 20.053 FMC 20 FMCN 20 20.096 20.129 31.975 32 31.938 31.963 44.619 45 0.0254 0.054 FM 25 FMN 25 25 25.020 25.053 FMC 25 FMCN 25 25.096 25.129 39.975 40 39.936 39.962 57.619 58 0.0254 0.109 FM 30 FMN 30 30 30.020 30.053 FMC 30 FMCN 30 30.096 30.129 46.975 47 46.937 46.962 67.619 68 0.0254 0.176 FM 40 FMN 40 40 40.025 40.064 FMC 40 FMCN 40 40.127 40.166 61.970 62 61.935 61.961 79.619 80 0.0254 0.356 FM 50 FMN 50 50 50.025 50.064 FMC 50 FMCN 50 50.127 50.166 74.970 75 74.935 74.960 99.619 100 0.0254 0.628 FM 60 FMN 60 60 60.030 60.076 FMC 60 FMCN 60 60.182 60.228 89.965 90 89.931 89.957 124.619 125 0.0380 1.117 FM 80 FMN 80 80 80.030 80.076 FMC 80 FMCN 80 80.182 80.228 119.965 120 119.931 119.957 164.619 165 0.0510 2.679
MOUNTING DIMENSIONS
H
HA
HB
J
JA
JB
Metric O’ring Size
Nominal Size mm
Ret. Ring Part No. Din 471
Part No.
Between Ret. Rings
Ret. Ring GRV. Width
Ret. Ring GRV. Dia.
Between O’ring GRVS.
O’ring GRV. Width
O’ring GRV. Dia.
Closed FM 05 FM 08 FM 10 FM 12 FM 16 FM 20 FM 25 FM 30 FM 40 FM 50 FM 60 FM 80
Open
FMN 05 FMN 08 FMN 10 FMN 12 FMN 16 FMN 20 FMN 25 FMN 30 FMN 40 FMN 50 FMN 60 FMN 80
5 8
12 14
1.14 1.14 1.32 1.32 1.32 1.63 1.90 1.90 2.20 2.70 3.20 4.17
11.5 15.2 18.0 21.0 24.9 30.3 37.5 44.5 59.0 72.0 86.4
12 16 19 22 26 32 40 47 62 75 90
5
2 2
9.86 13.2 15.7 17.9 21.9 27.9 35.9 42.7 56.3 69.2 81.7
9.7 x 1.3 13 x 1.7 15.5 x 2 17.5 x 2.5 21.5 x 2.5 27.5 x 2.5 35.5 x 2.5
5.33 5.63
10 12 16 20 25 30 40 50 60 80
19.4
2.44 3.17 3.17 3.17 3.17 3.17
20 22 28 40 48 56 72 95
6 8
10
12.5
15 20 25 30 40
42.52 x 2.62
4.1 4.1 7.1 7.1
56 x 3.5 69 x 3.5
81 x 5
125
116.1
120
111.7
111 x 5
66 Round Shaft Technology • pbclinear.com
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