Name: BA...XG BC...XG Complete Freewheels with lever arm
Brand: SUMA
Availability: InStock

Product Details

MODEL : Complete Freewheels BA...XG BC...XG

Data sheet

Item		BA...XG BC...XG
Brand		SUMA or OEM
Type		roller
Weight		5-260kg
Width		77-276mm
Material		GCr15
Precision		P6
Application		gearboxes;reducers;other machine

Complete Freewheels BA … XG and BC … XG

with lever arm

with sprag lift-off X and grease lubrication

Features

Complete Freewheels BA … XG and BC … XG with lever arm are sprag freewheels with sprag

lift-off X and grease-lubricated ball bearings. The sprag lift-off X ensures wear-free freewheeling operation when the inner ring rotates at high speed. The freewheels BA … XG have an end cover and are fitted to shaft ends. The freewheels BC … XG are arranged on

through shafts or shaft ends. The freewheels BA … XG and BC … XG are used as:

Backstops

for applications with high speed freewheeling operation.

Nominal torques up to 42 500 Nm. Bores up to 150 mm.

Freewheel Size		Type	Nominal Torque MN Nm	Sprag lift-off at inner ring speed min^-1	Max. speed Inner ring freewheels min^-1	Bore d				A mm	C mm	D mm	E mm	H mm	K mm	L mm	N mm	O mm	P mm	Q mm	R mm	S for Screw	Weight kg
						Standard			max. mm
						mm	mm	mm	max. mm
BA20	BC20	DXG	400	750	2500	30			30	110	90	106	8	80	2,5	77	11	104	19,5	65	70	M 10	5
BA25	BC25	DXG	650	700	2350	35	40		40	126	100	126	8	90	2,5	93	11	125	19,5	75	80	M 12	8
BA30	BC30	DXG	1 100	630	2350	45	50		50	155	120	151	10	120	3,5	102	16	140	27,5	95	100	M 16	12
BA40	BC40	SXG	1 400	430	2200	45	55	60	60	190	150	181	12	160	5,5	116	22	160	37,5	130	120	M 16	20
BA45	BC45	SXG	2 300	400	2200	55	65	70	70	210	160	196	14	175	7,5	130	26	176	41,5	140	130	M 16	25
BA52	BC52	SXG	4 900	320	2200	65	75	80	80	230	190	216	14	200	4,5	150	26	208	41,5	160	150	M 20	35
BA55	BC55	SXG	6 500	320	2000	75	85	90	90	255	200	246	15	210	3,5	170	29	228	49,5	170	160	M 20	50
BA60	BC60	SXG	14 500	250	1800	85	95	100	105	295	220	291	20	250	8,5	206	35	273	60,5	200	190	M 24	91
BA70	BC70	SXG	21 000	240	1650	120			120	335	260	321	25	280	14,5	215	39	291	65,5	225	210	M 24	115
BA 100	BC 100	UXG	42 500	210	1450	150			150	420	380	411	45	345	31,5	276	60	372	80,5	280	270	M 30	260

Application example

Complete Freewheel BA 52 SXG as a backstop on a radial fan. The backstop prevents a reverse rotation of the fan shaft from air flow or from an incorrectly polarized drive motor. By pulling out the holding pin in the lever arm, the shaft can be turned in both directions in order to carry out maintenance work. With the high shaft speed, the type with sprag lift-off X is used; the sprags work in freewheeling operation without contact and hence are wear-free.

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.

The tolerance of the shaft must be ISO h6 or j6. The freewheels BC … XG are supplied ready for installation. In the case of freewheels BA … XG, the inner ring must be secured axially with a retainer plate.

Example for ordering

Freewheel size BC 45 type with sprag lift-off X, grease lubrication and 65 mm bore:

• BC 45 SXG, d = 65 mm

When ordering, please also specify the freewheeling direction of the inner ring when

viewed in direction X:

• counterclockwise free or

• clockwise free