NF-Type Non-Contact Backstop

Product Description

1, Scope of application
NFnon-contact backstop is an kind of anti-reversing device suitable for high speed axle, possesses the advantages of reliable check effect, easy extrication, large check moment, light weight, convenient installation ect. Ist comprehensive mechanical performance evident superior to other backstops and extensively applies to band conveyer, belt-bucket elevator, drag conveyer and other equipments needing check requirements. The NF backstop produced by our factory, ist technical performance is completely up to the standard of ZBJ 81007-89. Meanwhile, in order to make user's instal-lation easier, our factory developed NFG non-contact backstop with anti-reserve seat.

2, Working principle
Inside of the backstop, there is several figured blocks in the rollaway nest between the inner ring and the outer ring, when inner ring forward direction rotating, drive the figured blocks to rotate together; When the rotational speed excesses the non-contact rotational speed, the figured blocks will be deflected under the centrifugal force and free from the inner and the outer rings, so as to accomplish non-abrasive rotation. When inner ring inverse direction rotating. Under the spring's acting force, the figured blocks get in touch with the inner and outer rings and wedging then into an organic whole, and bear the inverse torque conveyed form the inner ring.

Specification	Till specified countrary moment Te N·m	Not contact rotational speed r/min	Highest rotational speed r/min	Installation size										Biggest weight kg
Specification	Till specified countrary moment Te N·m	Not contact rotational speed r/min	Highest rotational speed r/min	dmax	dmin	D	d 1	H	B	L	L 1	L 2	L 3	Biggest weight kg
NF10	1000	450	1500	50	32	190	28	278	150	162	25	20	5	28
NF16	1600	450		60	45	208	32	305	160	167	25	22		31
NF25	2500	425		70	50	230	38	330	170	172	25	25		38
NF40	4000	425		80	60	245	42	358	185	183	28	30		49
NF63	6300	400		90	70	265	45	378	195	196	30	35		62
NF80	8000	400		100	80	285	48	410	210	200	35	35		73
NF100	10000	400		110	90	305	52	440	225	238	35	45		98
NF125	12500	375	1000	120	100	340	58	492	250	262	40	50	8	154
NF160	16000	375		130	110	370	62	532	260	273	40	58		175
NF200	20000	350		140	120	415	65	590	300	275	50	58		214
NF250	25000	350		150	130	450	70	646	335	285	50	63		256

More Product Features

Model:	NF
Standard:	ce
Origin:	Wenzhou,China
Packing:	Carton
Min. Order:	50pcs
Transportation:	by sea or by air or express
Company:	Zhejiang Yulong Machinery Manufacturing Co., Ltd.