Nyd Contact-Type Safety Torque-Limited Backstop for Belt Conveyor

Model NO.: NYD Highest Speed of Inner Race: 50r/Min-150r/Min MOQ: 1set Package: Wooden Case, Iron Case, Iron Cage, Frame Specification: ISO9001: 2008 HS Code: 8483409000 Rated Holdback Moment Te: 11000n.M-700000n.M Standards: ASTM,DIN,Sha,Cema.etc Terms of Shipment: by Sea Trademark: OUNA Origin: Toncheng, China NYD Contact-Type Safety Torque-Limited Backstop for Belt Conveyor

1. Structural features and operating principle
 
NJ(NYD) contact type wedge holdback (hereinafter referred to as "holdback") is a type of contact type anti-reversing device installed on the low speed shaft of the reducer or pulley shaft, compared with conventional holdback (roller holdback etc.), it has the advantages of big brake moment, reliable drive force, easy release, convenient installation (the requirement for installation accuracy is not high), it is composed of several wedges arranged in certain pattern between the raceways formed by inner race and outer race, when the inner race rotates in opposite direction, under the action of spring force, the inner race and outer race are wedged into an integral part so as to bear the holdback moment , it is widely used on the equipment with holdback requirement such as Belt Conveyor, Bucket Elevator etc. 

2 Main technical parameters and structural dimensions of NJ holdback                  Unit: mm

Specification	Rated holdback moment Te(N.m)	Range of hole diameter d (mm)	Highest speed of inner race (r/min)	Idle resistance moment (N.m)	Structural dimensions									Max. mass (kg)
					A	B	D	H	h	h1	Φ	L	L1
NJ110	11000	90-110	150	15	110	12	270	425	65	40	26	110	141	46.1
NJ130	16000	100-130	100	20	120	12	320	506	65	32	26	130	161	82.8
NJ160	25000	120-160	100	25	120	20	360	612	65	32	31	140	183	125
NJ200	38000	160-200	100	45	130	20	430	623	70	43	41	160	270	180
NJ(NYD)220	50000	160-220	80	75	238	256	500	820	80	/	/	230	303	351
NJ(NYD)250	90000	180-250	50	95	288	323	600	1000	100	/	/	290	367	675
NJ(NYD)270	125000	200-270	50	100	298	323	650	1100	110	/	/	290	367	737
NJ(NYD)300	180000	230-300	50	110	356	335	780	1300	135	/	/	290	392	1123
NJ(NYD)320	270000	250-320	50	140	386	345	850	1500	135	/	/	320	412	1425
NJ(NYD)350	320000	250-350	50	160	414	360	930	1600	135	/	/	360	426	1955
NJ(NYD)420	520000	320-420	50	220	474	484	1030	1800	165	/	/	450	550	2930
NJ(NYD)450	700000	350-450	50	250	526	494	1090	2000	165	/	/	480	574	3380

 
Note: the hole tolerance is F7 (GB1800-1804-1999), the recommended shaft tolerance is h6 and fit tolerance is F7/h6

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Product Categories : Backstop for Belt