Complete Freewheels FGR … R A3A4 and FGR … R A2A3

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Centimeter Equipment Trading Company Limited

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Complete Freewheels FGR … R A3A4 and FGR … R A2A3

Product information

INTRODUCTION

Features

Complete Freewheel FGR … R A2A3 and FGR … R A3A4 with lever arm are sealed roller freewheels with ball bearings. They are oil lubri-cated.

The freewheels FGR … R A3A4 have an end cover and are fitted to the shaft ends.

The freewheels FGR … R A2A3 are arranged onthrough shafts or shaft ends.

The oil filling is carried out after the freewheelhas been installed.

The freewheels FGR … R A2A3 and FGR…R

A3A4 are used as:

➧ Backstops

for applications with low to medium speed

freewheeling operation.

Nominal torques up to 68 000 Nm.

Bores up to 150 mm.

Application example

Complete Freewheel FGR 45 R A3A4 as a back-stop on the opposite ends of the drive shaft of a bucket conveyor. In the case of a motor stop,the bucket conveyor must be held securely so that the conveyor goods do not pull the belt backwards and, in doing so, drive the motor quickly. The backdriving torque is supported by the lever arm with holding pin on the housing.If the holding pin is removed, the belt shaft can be turned in both directions.

Type	Lever arm and cover combination		Nominal Torque M_N Nm	Max. speed Inner ring freewheels min^-1	Bore d mm	D mm	E mm	F mm	H mm	L mm	N mm	O mm	P mm	Q mm	S mm	Weight kg
R	A2A3	A3A4	55	2 500	12	62	13	1	51	42	10	64	10	44	12	1,4
R	A2A3	A3A4	130	2 200	15	68	13	1	62	52	10	78	10	47	12	1,8
R	A2A3	A3A4	180	1 900	20	75	15	1	72	57	11	82	12	54	12	2,3
R	A2A3	A3A4	290	1 550	25	90	17	1	84	60	14	85	16	62	12	3,4
R	A2A3	A3A4	500	1 400	30	100	17	1	92	68	14	95	16	68	12	4,5
R	A2A3	A3A4	730	1 300	35	110	22	1	102	74	18	102	20	76	12	5,6
R	A2A3	A3A4	1 000	1 150	40	125	22	1	112	86	18	115	20	85	13	8,5
R	A2A3	A3A4	1 150	1 100	45	130	26	1	120	86	22	115	25	90	14	8,9
R	A2A3	A3A4	2 100	950	50	150	26	1	135	94	22	123	25	102	15	12,8
R	A2A3	A3A4	2 600	900	55	160	30	1	142	104	25	138	32	108	18	16,2
R	A2A3	A3A4	3 500	800	60	170	30	1	145	114	25	147	32	112	18	19,3
R	A2A3	A3A4	6 000	700	70	190	35	1	175	134	30	168	38	135	17	23,5
R	A2A3	A3A4	6 800	600	80	210	35	1	185	144	30	178	38	145	17	32,0
R	A2A3	A3A4	11 000	500	90	230	45	1	205	158	40	192	50	155	17	47,2
R	A2A3	A3A4	20 000	350	100	270	45	1	230	182	40	217	50	180	17	76,0
R	A2A3	A3A4	31 000	250	130	310	60	1	268	212	55	250	68	205	18	110,0
R	A2A3	A3A4	68 000	200	150	400	60	1	325	246	55	286	68	255	20	214,0

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.

Mounting
The backdriving torque is supported by the lever
arm with holding pin. The holding pin engages
in a slot or bore in the frame of the machine. It
must have 0,5 to 2 mm play in the axial and radial
directions.
If the holding pin is removed, the shaft can be
turned in both directions.
In the case of freewheels FGR … R A3A4, the
inner ring must be secured axially with a retainer
plate.
The tolerance of the shaft must be ISO h6 or j6.

Example for ordering
Basic Freewheel, lever arm, cover, seals and
screws are supplied loose provided nothing else
is stated in the order.
Freewheel size FGR 25, standard type with lever
arm A3 and cover A4:
• FGR 25 R A3A4
If assembled, oil-filled, Complete Freewheels
FGR … R A2A3 are to be supplied, this must be
specified in the order. When ordering, please also
specify the freewheeling direction of the inner
ring when viewed in direction X:
• counterclockwise free or
• clockwise free