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BD20 Complete Freewheel 1700RPM Overrunning Clutch Bearing

BD20 Complete Freewheel 1700RPM Overrunning Clutch Bearing

Features

Complete Freewheels BD … X are sealed sprag freewheels with ball bearings and sprag lift-off X. They are supplied oil-filled. The sprag lift-off X ensures wear-free freewheeling operation when the inner ring rotates at high speed.

The freewheels BD … X are used as:

➧ Backstops

➧ Overrunning Clutches

for applications with high speed freewheeling operation and when used as an overrunning clutch with low speed driving operation.

Nominal torques up to 42 500 Nm.

Bores up to 150 mm.

Technical Datas

Item	BD20
Inner dia.	20 mm
Outer dia.	106 mm
Width	77 mm
Torque	420 Nm
Weight	3.8 kg
Port	Shanghai;Ningbo
Delivery time	10-15 days
Package	wooden package, carton package,etc
Application	Conveyer, Electric Motor,Bucket elevator,etc

Dimensions and Capacities

Freew heel Size	Type	Nom inal torque MN Nm	Sprag lift-off at inner ring speed min-1	Max. speed Inner ring freew heels/ over runs min-1	Outer ring drives min-1	mm	Bore d Stan dard mm	mm	max. mm	B mm	D mm	F mm	G**	H mm	K mm	L mm	R mm	S mm	T mm	Z**	Wei ght kg
BD 20	DX	420	750	1 700	300	30			30	65,5	106	0,75	M 6	26	5	77	70	0,5	90	6	3,8
BD 25	DX	700	700	1 600	280	35	40		40	81,5	126	0,75	M 6	30	5	93	80	0,5	105	6	6,6
BD 30	DX	1 250	630	1 600	252	45	50		50	88,5	151	0,75	M 8	36	6	102	100	1,5	130	6	10,3
BD 40	SX	1 900	430	1 500	172	45	55	60	60	102,5	181	0,75	M10	37	6	116	120	3,5	160	6	17,4
BD 45	SX	2 300	400	1 500	160	55	65	70	70	115,5	196	1,25	M 12	38	6	130	130	5,0	170	8	22,4
BD 52	SX	5 600	320	1 500	128	65	75	80	80	130,5	216	1,75	M14	44	8	150	150	4,5	190	8	31,1
BD 55	SX	7 700	320	1 250	128	75	85	90	90	146,5	246	1,75	M 14	48	10	170	160	2,5	215	8	45,6
BD 60	SX	14 500	250	1 100	100	85	95	100	105	182,5	291	1,75	M 14	55	10	206	190	2,5	250	8	78,2
BD 70	SX	21 000	240	1 000	96	120			120	192,5	321	1,25	M 16	58	10	215	210	5,0	280	8	93,4
BD 100	UX	42 500	210	750	84	150			150	248,5	411	3,75	M 20	79	10	276	270	6,5	365	10	198,4

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.

** Z = Number of tapped holes G on pitch circle T.

Mounting Example

Complete Freewheel BD 45 SX as an overrun-ning clutch on the shaft end of the high speed rotating main drive of a textile machine. The sprocket is linked to an auxiliary drive. In normal operation (freewheeling operation) the inner ring overruns and the outer ring is at a standstill with the bolted on sprocket. During set-up, the machine is driven by the slowly running aux i-liary drive via the chain drive and the freewheel that is working in the driving operation. With the high speed of the inner ring in freewheeling operation, the type sprag lift-off X is used; the sprags work in freewheeling operation without contact and hence are wear-free.

Mounting
The customer attachment part is centered on the diameter R and bolted on to the face. The pilot on the covers is particularly suitable for at- taching smaller and narrower parts (sprockets, gear wheels etc.). The customer must provide fastening screws of the necessary length in order to mount the attachment part.

The tolerance of the shaft must be ISO h6 or j6 and the tolerance of the pilot diameter R of the attachment part must be ISO H7 or J7.

Example for ordering

Freewheel size BD 30, type with sprag lift-off X

and 45 mm bore:

• BD 30 DX, d = 45 mm

Pictures

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Categories	Overrunning Clutch Bearing
Brand Name:	SUMA
Model Number:	BD20
Certification:	ISO SGS
Place of Origin:	CHINA
MOQ:	1
Price:	USD600-USD650 PER PIECE
Payment Terms:	L/C, D/A, D/P, T/T, Western Union, Paypal
Supply Ability:	1000PCS Per Month
Delivery Time:	10-15 Days
Packaging Details:	Wooden Case
Product Name:	Overrunning Clutch Bearing BD20
Material:	GCr15 Bearing Steel
Torque Capacity:	420Nm
Rotation Speed:	1700RPM
Unit Weight:	3.8Kg
Warranty:	1 Year
Size:	3010677mm
OEM:	Accept
Port:	Shanghai Ningbo