NF type non-contact backstop

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NF type non-contact backstop

Other introductions:
NF type non-contact backstop is a new device that utilizes the centrifugal force of a special shaped wedge block and its special combination relationship with the inner and outer rings to achieve non-contact and wear-resistant operation of the main components during forward operation, and reliable backstop in reverse. Reverse stoppers are widely used in transportation machinery, elevators, and other mechanical equipment that require reverse stoppers. This product has a strong reverse function and high reliability. The advantages of long service life, light weight, and easy installation and maintenance make its comprehensive performance significantly better than other check devices.

Basic parameters and dimensions of NF non-contact backstop
Model	Rated reverse torque（N.m)	Minimum non-contact rotational speed nf	Maximum speed nmax	Aperture range d	Installation axis extension range s	Appearance and installation dimensions								Qualitym (kg)
Model	Rated reverse torque（N.m)	Minimum non-contact rotational speed nf	Maximum speed nmax	Aperture range d	Installation axis extension range s	1	D	d1	H	B	L1	L2	L3	Qualitym (kg)
NF10	1000	420	1500	32~50	120~142	190	30	278	150	162	20	20	5	28
NF16	1600	420	1500	45~60	125~148	208	30	300	160	168	20	22	5	31
NF25	2500	400	1500	50~70	130~152	230	40	330	170	172	25	25	5	38
NF40	4000	400	1500	60~80	135~162	245	40	353	185	185	25	30	5	49
NF63	6300	375	1500	70~90	155~178	265	45	380	195	198	30	35	5	65
NF80	8000	375	1500	80~100	160~182	290	45	410	210	200	30	35	5	82
NF100	10000	375	1500	90~110	170~218	320	55	440	225	238	32	45	5	119
NF125	12500	355	1500	100~130	180~248	340	55	480	250	262	32	50	8	154
NF160	16000	355	1000	110~140	200~258	370	62	520	260	275	40	55	8	183
NF200	20000	315	1000	120~150	205~258	420	62	585	300	275	40	58	8	244
NF250	25000	315	1000	130~160	230~268	470	65	655	335	285	42	63	8	311

Keyway dimensions for various aperture sizes (length unit: mm)
D(E7)	32	38	40	42	45	48	50	55	60	65	70	75
h	35.3	41.3	43.3	45.3	48.8	51.8	53.8	59.3	64.4	69.4	74.9	79.9
b(C11)	10	10	12	12	14	14	14	16	18	18	20	20
d(E7)	80	85	90	95	100	110	120	130	140	150	160
h	85.4	90.4	95.4	100.4	106.4	116.4	127.4	137.4	148.4	158.4	169.4
b(C11)	22	22	25	25	28	28	32	32	36	36	40

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