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Internal Freewheels FGK

Internal Freewheels FGK are sprag freewheels from Suma bearing exporter with bearing support in the dimensions of the needle bearing series 59. The freewheels are supplied grease-filled for normal operating conditions and are maintenance-free.

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Product Detail

Internal Freewheels FGK

Features

The outer ring is pressed into the customer housing. This makes compact, space-saving f itting solutions possible.

The freewheels FGK are used as

➧Backstops

➧Overrunning Clutches ➧Indexing Freewheels

Nominal torques up to 460 Nm.

The torque is transmitted on the outer ring by press fit.

Bores up to 50 mm.

Application example

Internal Freewheel FGK 35 as an indexing freewheel in a circular knitting machine. Set-up in order to change material or after breakdown requires a sensitive, manual adjustment of the rotary table. Therefore the rotary table is moved per hand lever via the freewheel which is working in driving operation. After set-up, the drive is carried out via the main motor and the freewheel outer ring overruns.

Sizes of Internal Freewheels FGK

Different types of Internal Freewheels FGK

Freewheel Size	Nominal t orque M_N Nm	Max. speed Inner ring freewheels/ overruns min^-1	Outer ring freewheels/ overruns min^-1	dynamic C Roller N	Load rating of bearing support Ball N	Bore d mm	D mm	K mm	L mm	Weight kg
FGK 20	50	5 500	4 000	5 600	4 400	20	37	42	23	0,09
FGK 25	70	5 300	3 800	6 300	5 300	25	42	48	23	0,11
FGK 30	95	5 000	3 500	7 700	5 500	30	47	54	23	0,13
FGK 35	200	4 600	3 200	8 200	8 500	35	55	63	27	0,20
FGK 40	310	4 200	3 000	8 650	8 300	40	62	70	30	0,30
FGK 45	370	3 800	2 500	9 200	9 650	45	68	76	30	0,34
FGK 50	460	3 400	2 200	9 650	10 000	50	72	80	30	0,36

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

Mounting
The torque is transmitted on the inner and
outer ring by press fit. In order to transmit the
torques specified in the table, the outer ring
must be accommodated 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 smal-
ler external diameters, we urge you to contact
us regarding the transmissible torque.
The tolerance of the housing bore D must be
ISO R6 and the tolerance of the shaft must be
ISO p5. With these fits, normal bearing clearance
is achieved in a built-in state.
The permissible operating temperature of the
freewheel is - 40°C to 80°C.

Lubrication
The freewheels are supplied grease-filled for
normal operating conditions. However, the
freewheels can also be connected to the custo-
mer’s oil lubrication systeem; this is particularly
recommended in the case of higher speeds.
Example for ordering
Freewheel size FGK 40, standard type:
• FGK 40

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