GFRN70 one-way bearing rowing machine bearing

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Types GFR,GFRN are roller type freewheels. They are bearing supported, using two 160.. series bearings, and require oil lubrication. These units may be used in designs providing oil lubrication and sealing as on the example overleaf. The bearings must not be axially stressed.

Typically, types GFR,GFRN are used with the F series covers that are designed to transmit torque, and provide oil lubrication and sealing. Usually these covers are used in pairs according to combinations shown on the following pages. The outer race of the GFR model is plain to receive and center any component bored to H7 tolerance.

Torque is transmitted by bolts through the cover plate in this case. Types GFR, GFRN are identical except that type GFRN has a keyway on the outside diameter to transmit the torque. Two paper seals are delivered with each unit to be placed between the outer race and cover plates.

 

Type Size Overrunning speeds Number Weight
dH7 TKN1) nimax2) namax3) Dh7 D2 D4 D3 G t z L 1 L B t1 bP10 f
GFR
GFRN		 [mm] [Nm] [min-1] [min-1] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [kg]
12* 55 4000 7200 62 20 42 51 ø5.5 – 3 42 20 27 2.5 4 0.5 0.5
15 125 3600 6500 68 25 47 56 M5 8 3 52 28 32 3 5 0.8 0.8
20 181 2700 5600 75 30 55 64 M5 8 4 57 34 39 3.5 6 0.8 1
25 288 2100 4500 90 40 68 78 M6 10 4 60 35 40 4 8 1 1.5
30 500 1700 4100 100 45 75 87 M6 10 6 68 43 48 4 8 1 2.2
35 725 1550 3800 110 50 80 96 M6 12 6 74 45 51 5 10 1 3
40 1025 1150 3400 125 55 90 108 M8 14 6 86 53 59 5 12 1.5 4.6
45 1125 1000 3200 130 60 95 112 M8 14 8 86 53 59 5.5 14 1.5 4.7
50 2125 800 2800 150 70 110 132 M8 14 8 94 64 72 5.5 14 1.5 7.2
55 2625 750 2650 160 75 115 138 M10 16 8 104 66 72 6 16 2 8.6
60 3500 650 2450 170 80 125 150 M10 16 10 114 78 89 7 18 2 10.5
70  5750  550  2150  190  90  140  165  M10 16  10  134  95  108  7.5 20  2.5 13.5
80 8500 500 1900 210 105 160 185 M10 16 10 144 100 108 9 22 2.5 18.2
90 14500 450 1700 230 120 180 206 M12 20 10 158 115 125 9 25 3 28.5
100 20000 350 1450 270 140 210 240 M16 24 10 182 120 131 10 28 3 42.5
130 31250 250 1250 310 160 240 278 M16 24 12 212 152 168 11 32 3 65
150 70000 200 980 400 200 310 360 M20 32 12 246 180 194 12 36 4 138

 

 

NOTES

1) T max = 2 × T KN

2) Inner race overruns. Values without radial lip seals

3) Outer race overruns. Values without radial lip seals

Keyway to DIN 6885.1

*) GFR12 has through holes in outer race