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Nuflex Flexible Gear Couplings

Nu-Teck manufactures straight tooth Gear Coupling and Tripple Crowned Teeth Gear Coupling.

Disadvantage in Straight Tooth Gear Couplings are,


Under the misalignment condition of two shafts of the equipments, the teeth contact in case of straight cut hub will be as minimum as shown in the fig No.1 Under heavy loads the ends of the hub teeth will get damaged resulting in the excessive play between hub & sleeve and therefore the reduction in life of coupling

Nu-Teck Tripple Crowned Teeth Gear Coupling

The triple crowned teeth hub is manufactured on a fully automatic hobbing machine with built in crowing attachment which is controlled by hydraulic & electronic systems. Under the misalignment condition of two shafts on the equipment, due to the curvature on teeth flank the contact area is much more and therefore, there is increase in life of coupling.

Misalignment Details: In case of straight tooth gear coupling the maximum allowable angular misalignment ( ) is 1.1/2 deg. and in case of NU-TECK Triple Crowned tooth Gear Coupling the misalignment is 3.1/2 deg.

SERVICE FACTOR	PRIME MOVER
Driven Unit (Machinery)	Electric Motor or Steam Turbine	Geasoline or Diesel Engine 4 or more Cyl.	Gasoline or Diesel Engine more than 6 Cyl.
LIGHT
Uniform of Steady load never exceeding horse rating, infrequent starting : Agitators, Blowers, Can Filling Machines, Conveyors, Fans, Generators, Pumps, Steering Gear, Stokers.	1.0	1.5	2.0
MODERATE
Heavy inertia, moderate shock, frequent starting: peak loads do not exceed 125 percent average horsepower. Uneven load: Conveyorts, Feeders, Welding Laundry Washers, Mixers Paper Mills, Printing Presses, Screens, Textile Industry, Car Pullers.	1.5	2.0	2.5
HEAVY
Heavy shock conditions or frequent reverseing peak loads do not exceed 150 percent average horse power. Uneven load : Cranes & Hoists, Crushers, Dredges, Elevators, Hammer Mils, Lumber Industry. Machine Tools,, Metal Mills, Oil Industry, Rubber Industry Windlass.	2.0	2.5	3.0

COMMON FOR BOTH COUPLINGS												FULL FLEXIBLE TYPE					HALF FLEXIBLE TYPE
NU-TECK G.C. No.	H.P. capacity AT 100 R.P.M.	Max. Torque Kg. M.	Max. R.P.M.	Bore Min.	A	C	D	F	M	G	H	Bore Max.a	J	B	WR2 Kgm2	Wt in Kg	K	Q	Bore Max.	F1	WR2 Kgm2	Wt in Kg.
GC-100	7	50	8000	10	120	45	50	75	55	1.5	1.5	32	40	93	0.03	4.5	93	46.5	45	70	0.04	5
GC-101	14	100	6300	20	170	55	65	110	65	2.5	17	45	49	115	0.14	11	115	57.5	60	85	0.15	11
GC-102	35	250	5000	30	185	70	85	125	80	2.5	27	60	62	145	0.20	15	145	72.5	75	110	0.24	15
GC-103	63	450	4000	40	220	85	105	150	105	2.5	20	75	78	175	0.48	25	175	87.5	90	130	0.51	20
GC-104	119	850	3350	50	250	105	130	175	125	2.5	20	90	96	215	0.95	39	215	107.5	110	160	1.0	40
GC-105	182	1300	2800	60	290	110	155	200	140	5	25	110	106	230	1.90	57	230	115	130	185	2.0	60
GC-106	280	2000	2500	75	320	125	175	230	155	5	25	125	117	260	3.00	85	260	130	150	215	3.3	80
GC-107	490	3500	2100	90	350	140	205	260	175	5	25	140	134	290	5.25	103	290	145	170	240	5.8	106
GC-108	630	4500	1900	105	380	155	230	290	190	5	25	160	147	320	8.50	138	320	160	200	285	9.5	149
GC-109	784	5600	1700	125	430	165	250	330	205	5	27	180	156	340	15.00	210	340	170	220	315	16.8	170
GC-110	1148	8200	1400	140	490	180	310	390	220	5	27	220	171	370	30.50	277	370	185	260	370	35.0	264
GC-111	1536	11000	1250	160	545	200	350	445	240	5	30	260	192	410	58	550
GC-112	2053	14700	1120	180	590	240	400	490	280	5	30	300	231	490	88	710
GC-113	2793	20000	1000	200	680	260	440	555	310	7.5	35	330	242	535	138	980
GC-114	3994	28600	900	220	730	280	500	610	330	7.5	35	370	266	575	291	1320
GC-115	4852	34750	800	250	780	320	540	660	370	7.5	35	410	305	655	353	1700

Nuflex Flexible Gear Couplings for Sugar, Steel & Rubber manufacturing machineries

Coupling No.	Pilot Bore	Max. Bore	Max. Torque	Max. Speed	WT	H.P. Capacity at 100 RPM	Moment of Insersia Kgm2	A	B	C	D	E	F	G	H	M
114	220	370	28600	900	1320	3994	291	730	610	500	261	570	35	280	10	340
115	250	410	34750	800	1700	4852	353	780	660	540	305	655	35	320	15	385
115 M	300	420	53570	750	2000	7480	500	825	690	558	315	690	45	335	20	400
116	300	455	60000	710	2550	8378	691	900	755	625	330	720	45	350	20	420
116 M	330	480	72000	670	3100	10145	965	950	805	680	340	770	45	375	20	460
117	375	520	85350	630	3620	11917	1235	1000		720	380	820	45	400	20	490

NOTE :

	1.	Made to order / special Gear Coupling also can be manufactured
	2.	Dynamic balancing & Heat Treatment will be done on request
	3.	We also manufacture gear coupling with spacer & cordon shaft.

How to select the right Nuflex Gear Couplings ?

	1.	Select the size Nuflex Coupling that will accomodate the diameter of the largest shaft. Usually this will determine the proper size Coupling for your condition.
	2.	To make sure this Coupling has the required capacity: a) Check your application against the Service Factor Chart. Use the following formula to ontain HP per 100 RPM of your application HP x Service Factor x 100 / RPM = HP / 100 RPM

Lubrication

Gear Couplings must be filled with proper grade of Grease or Oil while installation and periodically also. It is recommanded to use grease where the maximum temperature is within 80 ^oC and for temperature above 80 ^oC oil should be used. We suggest to use following grades of grease / Oil for a good performance.

For speed above 1500 RPM use oil SERVOMESH A-90 of Indian Oil Corporation having viscosity 91 C/S at 100 ^oC or of 324 = 35 cst/50 ^oC (43 ^o Engler / 50 ^oC) OR equivalant.

For lesser speeds use grease with high pressure additives like SERVOPLEX EP - 1 of Indian Oil Corpn. or SHELL ALVAMIA EP - 2 or lithium/sodium grease with EP / additives drop over 180 degree C grade of penetration.