Internal Freewheels FNR
for keyway connection on the outer ring
with rollers and bearing
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:
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 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|
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.
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.
An oil lubrication of the specified quality must be provided.