FREEWHEEL FXM RINGSPANN

DESCRIPTION: For application as backstop in installations with high speeds in freewheeling operation. For application as overrunning clutch in instal- lations with low speeds in driving operation. Features. Integrated Freewheels FXM are sprag free- wheels without bearing support and with sprag lift-off X. The sprag lift-off X ensures a wear-free free- wheeling operation when the inner ring rotates at high speed. Nominal torques up to 1 230 000 Nm. Bores up to 500 mm. A multitude of standard- ized bore diameters are available with short de- livery times.

SPECIFICATIONS

FREEWHEELS FXM RINGSPANN

For application as backstop freewheel in installations with high speeds in freewheeling operation.
For application as overrunning clutch in instal- lations with low speeds in driving operation.
Features
Integrated Freewheels FXM are sprag free- wheels without bearing support and with sprag lift-off X.
The sprag lift-off X ensures a wear-free free- wheeling operation when the inner ring rotates at high speed.
Nominal torques up to 1 230 000 Nm.
Bores up to 500 mm. A multitude of standard- ized bore diameters are available with short de- livery times.

Integrated Freewheels FXM are equipped with sprag lift-off X. The sprag lift-off X is used for backstops and overrunning clutches, provided that in freewheeling operation the inner ring is rotating at high speed and providing with overrunning clutches that the driving operation is conducted at low speed. In freewheeling operation, the centrifugal force FC causes the sprag to lift off from the outer track. In this operating state, the freewheel works wear-free,
i.e. with unlimited service life.

Figure 58-2 shows a freewheel FXM with sprag lift- off X in freewheeling operation. The sprags, which are supported in a cage connected with the inner ring, rotate with the inner ring. The centrifugal force FC that is applied in the center of gravity S of the sprag turns the sprag coun- terclockwise and rests against the support ring of the cage. This results in the gap a between the sprag and the outer track; the freewheel works without contact. If the inner ring speed decreases to such an extent that the effect of the centrifugal force on the sprag is less than that of the spring force FF , the sprag again rests on the outer ring and the freewheel is ready to lock (figure 58-3). If used as an overrunning clutch, the driving speed must not exceed 40% of the lift-off speed.

Catalogue Freewheels Ringspann FXM

Catalogue freewheels Ringspann FXM:

Freewheel Size	Type	Bore d			A mm	B mm	D mm	F mm	J mm	L mm	P mm	T mm	Z**	Weight kg
		Standard		max
		mm	mm	mm
FXM 31 -17	NX	20*		20*	17	25	85	55	31	24	1.0	70	6	0.8
FXM 38 -17	NX	25*		25*	17	25	90	62	38	24	1.0	75	6	0.9
FXM 46 -25	NX	30		30	25	35	95	70	46	35	1.0	82	6	1.3
FXM 51 -25	NX	35		36	25	35	105	75	51	35	1.0	90	6	1.7
FXM 56 -25	NX	35	40	40	25	35	110	80	56	35	1.0	96	8	1.8
FXM 61 -19	NX	35	40	45*	19	27	120	85	61	25	1.0	105	6	1.8
FXM 66 -25	NX	40	45	48	25	35	132	90	66	35	1.0	115	8	2.8
FXM 76 -25	NX	50	55	60*	25	35	140	100	76	35	1.0	125	8	3.1
FXM 86 -25	NX	50	60	70*	25	40	150	110	86	40	1.0	132	8	4.2
FXM 101 -25	NX	75		80*	25	50	175	125	101	50	1.0	155	8	6.9
FXM 85 -40	MX	60		65	40	50	175	125	85	60	1.0	155	8	7.4
FXM 100 -40	MX	70		80*	40	50	190	140	100	60	1.5	165	12	8.8
FXM 120 -50	MX	80		95	50	60	210	160	120	70	1.5	185	12	12.7
FXM 140 -50	MX	90		110	50	70	245	180	140	70	2.0	218	12	19.8
FXM 170 -63	MX	100		130	63	80	290	210	170	80	2.0	258	12	33.0
FXM 200 -63	MX	120		155	63	80	310	240	200	80	2.0	278	12	32.0

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