Internal Freewheels FSN|one way clutch bearing maker|Suma

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Internal Freewheels FSN

Internal Freewheels FSN are roller freewheels without bearing support.
The freewheel is built into the customer housing. This makes compact, space-saving fitting solutions possible.

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Product Detail

Features

Internal Freewheels FSN are roller freewheels without bearing support.

The freewheel is built into the customer housing. This makes compact, space-saving fitting solutions possible.

The freewheels FSN 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 80 mm.

Application example

Internal freewheel FSN 50 as backstop fitted to the end of the intermediate shaft of a spur gear -box in the drive of an elevator. In the case of a motor stop, the elevator must be held se curely so that the conveyor goods do not pull back-wards.

Sizes of Sprag type backstop RSRV T

Different types of Sprag type backstop RSRV T

Freewheel Size	Nominal torque M_N Nm	Max. speed Inner ring freewheels/ overruns min^-1	Outer ring freewheels/ overruns min^-1	Bore d mm	B mm	D mm	E mm	F mm	N mm	P mm	Weight kg
FSN8	11	3 050	4 700	8	13	35	18,5	28	4	1,3	0,1
FSN12	11	3 050	4 700	12	13	35	18,5	28	4	1,3	0,1
FSN15	36	2 350	3 700	15*	18	42	21,0	36	5	1,7	0,1
FSN17	56	2 100	3 300	17*	19	47	24,0	40	5	2,0	0,2
FSN20	90	1 750	3 200	20*	21	52	29,0	45	6	1,5	0,2
FSN25	125	1 650	3 100	25*	24	62	35,0	52	8	2,0	0,4
FSN30	210	1 400	2 200	30*	27	72	40,0	60	10	2,5	0,6
FSN35	306	1 250	2 150	35*	31	80	47,0	68	12	3,5	0,8
FSN40	430	1 100	2 050	40*	33	90	55,0	78	12	3,5	0,9
FSN45	680	1 000	1 900	45*	36	100	56,0	85	14	3,5	1,3
FSN50	910	900	1 750	50*	40	110	60,0	92	14	4,5	1,7
FSN60	1 200	750	1 450	60*	46	130	75,0	110	18	5,5	2,8
FSN70	2 000	600	1 000	70*	51	150	85,0	125	20	6,5	4,2
FSN80	3 000	500	900	80*	58	170	95,0	140	20	7,5	6,0

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

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 FSN are without bearing
support. Concentric alignment of inner and
outer ring must be provided by the customer.
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.

Example for ordering
Freewheel size FSN 12, standard type:
• FSN 12