Internal Freewheels FNR
for keyway connection on the outer ring
with rollers and bearing
Features
Internal Freewheels FNR are roller freewheels with bearing support. The freewheels of sizes 8
to 20 have a sleeve bearing. The sizes 25 to 60 have ball bearings, these enable higher speeds in freewheeling operation. The freewheel is built into the customer housing. This makes compact, space-saving fitting solutions possible. The freewheels FNR are used as:
Backstops
Overrunning Clutches
Indexing Freewheels
Nominal torques up to 3 000 Nm. The faces of both sides of the outer ring are provided with
grooves for torque transmission. Bores up to 60 mm.
Freewheel Size |
Nominal torque |
Max. speed |
Bore d |
B |
D |
E |
F |
N |
P |
Weight |
MN |
Inner ring freewheels/ |
Outer ring freewheels/ |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
kg |
Nm |
overruns min-1 |
overruns min-1 |
|
|
|
|
|
|
|
|
FNR 8 |
18 |
1 200 |
1 200 |
8 |
20 |
37 |
19 |
30 |
6 |
3,0 |
0,1 |
FNR 12 |
18 |
1 200 |
1 200 |
12 |
20 |
37 |
19 |
30 |
6 |
3,0 |
0,1 |
FNR 15 |
50 |
950 |
950 |
15 |
30 |
47 |
23 |
37 |
7 |
3,5 |
0,3 |
FNR 20 |
112 |
650 |
650 |
20 |
36 |
62 |
35 |
50 |
8 |
3,5 |
0,6 |
FNR 25 |
220 |
1 550 |
3 350 |
25 |
40 |
80 |
40 |
68 |
9 |
4,0 |
1,3 |
FNR 30 |
410 |
1 400 |
3 050 |
30 |
48 |
90 |
45 |
75 |
12 |
5,0 |
1,9 |
FNR 35 |
500 |
1 300 |
2 850 |
35 |
53 |
100 |
50 |
80 |
13 |
6,0 |
2,6 |
FNR 40 |
750 |
1 150 |
2 500 |
40 |
63 |
110 |
55 |
90 |
15 |
7,0 |
3,6 |
FNR 45 |
1 020 |
1 100 |
2 400 |
45 |
63 |
120 |
60 |
95 |
16 |
7,0 |
4,2 |
FNR 50 |
1 900 |
950 |
2 050 |
50 |
80 |
130 |
70 |
110 |
17 |
8,5 |
6,0 |
FNR 55 |
2 000 |
900 |
1 900 |
55 |
80 |
140 |
75 |
115 |
18 |
9,0 |
6,8 |
FNR 60 |
3 000 |
800 |
1 800 |
60 |
95 |
150 |
80 |
125 |
18 |
9,0 |
9,5 |
Application example
Internal Freewheel FNR 40 as an indexing freewheel for an incremental drive in the feed -
ing device of a wire processing machine. The indexing lever is driven by a crank operation.
The back and forth movement is transferred by the indexing freewheel in a gradual rotating
movement of the wire feeding device.
Mounting
The tolerance of the housing bore D must be ISO H7 or G7 and the tolerance of the shaft must
be ISO h6 or j6. The outer ring has to be completely enclosed in a stable housing to transmit the listed torques.
Lubrication
An oil lubrication of the specified quality must be provided.