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Internal Freewheels FXN

Integrated Freewheels FXM are sprag freewheels without bearing support and with sprag lift-off X.

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Product Detail

Different types of Internal Freewheels FXN

The maximum transmissible torque is 2 times the specified nominal torque. See page 14 for determination of selection torque.

The theoretical nominal torque applies only for ideal concentricity between the inner and outer ring. In practice, the concentricity is affected by the bearing play and centering errors of the neigh bour-

ing parts. Then the nominal torques specified in the table apply, whilst taking into consideration the existing run out (T.I.R.).

Higher speeds upon request.

Sizes of Internal Freewheels FXN

	Freewheel size	mm	mm	Bore d Standard mm mm		mm	mm	max. mm	B mm	D mm	F mm	J mm	K min. mm	L mm	Weight kg
FXN	31 - 17/60	20*						20*	25	60 P6	55	31	85	24	0,3
FXN	31 - 17/62	20*						20*	25	62 P6	55	31	85	24	0,4
FXN	38 - 17/70	25*						25*	25	70 P6	62	38	90	24	0,4
FXN	46 - 25/80	25						30	35	80 P6	70	46	95	35	0,8
FXN	51 - 25/85	25	30	35				36	35	85 P6	75	51	105	35	0,8
FXN	56 - 25/90	35						40	35	90 P6	80	56	110	35	0,9
FXN	61 - 19/95	30	35	40				45*	26	95 P6	85	61	120	25	0,8
FXN	61 - 19/106	30	35	40				45*	25	106 H7	85	61	120	25	1,2
FXN	66 - 25/100	35	40	45				48*	30	100 P6	90	66	132	35	1,1
FXN	66 - 25/110	35	40	45				48*	40	110 P6	90	66	132	35	1,8
FXN	76 - 25/115	45	55					60*	40	115 P6	100	76	140	35	1,7
FXN	76 - 25/120	45	55					60*	32	120 J6	100	76	140	35	1,8
FXN	86 - 25/125	40	45	50	60	65		70*	40	125 P6	110	86	150	40	2,3
FXN	86 - 25/130	40	45	50	60	65		70*	40	130 P6	110	86	150	40	2,6
FXN 101 - 25/140		55	70					75	45	140 P6	125	101	175	50	3,1
FXN 101 - 25/149		70						75	62	149 H6	125	101	175	62	4,2
FXN 101 - 25/150		55	70					75	45	150 P6	125	101	175	50	3,6
FXN 85 - 40/140		45	50	60	65			65	45	140 P6	125	85	175	60	3,2
FXN 85 - 40/150		45	50	60	65			65	45	150 P6	125	85	175	60	4,2
FXN 100 - 40/160		45	50	55	60	70	75	75	50	160 P6	140	100	190	60	5,1
FXN 105 - 50/165		80						80	62	165 P6	145	105	195	62	5,8
FXN 120 - 50/198		60	65	70	75	80	95	95	70	198 H6	160	120	210	70	8,6
FXN 140 - 50/215		65	90	100	110			110	69	215 J6	180	140	245	70	14,0
FXN 170 - 63/258		70	85	100	120			130	80	258 H6	210	170	290	80	21,0

Keyway according to DIN 6885, page 1 • Tolerance of keyway width JS10.

* Keyway according to DIN 6885, page 3 • Tolerance of keyway width JS10.

Mounting
Internal Freewheels FXN are without bearing
support. Concentric alignment of inner and
outer ring must be provided by the customer.
The permissible run out (T.I.R.) must be obser-
ved.
The torque is transmitted on the outer ring by
press fit. In order to transmit the torques speci-
fied in the table, the outer ring must be accom-
modated in a housing with an external
diameter K. The housing is made of steel or grey
cast iron in minimum quality GG-20. When
using other housing materials or smaller exter-
nal diameters, we urge you to contact us regar-
ding the transmissible torque.
The tolerance of the housing bore is specified
in the table under dimension D.
The tolerance of the shaft must be ISO h6 or j6.

Lubrication
At speeds in excess of the sprag lift-off speed,
no special lubrication is required; the freewheel
functions maintenance-free.
When operating below the sprag lift-off speed,
an oil lubrication of the specified quality must
be provided.
Example for ordering
Freewheel size FXN 61 - 19/95, type with sprag
lift-off X and 35 mm bore:
• FXN 61-19/95 NX, d = 35 mm