A gear coupling is a mechanical device for transmitting torque between two shafts that are not collinear. It consists of a flexible joint fixed to each shaft. The two joints are connected by a third shaft, called the spindle.

Each joint consists of a 1:1 gear ratio internal/external gear pair. The tooth flanks and outer diameter of the external gear are crowned to allow for angular displacement between the two gears. Mechanically, the gears are equivalent to rotating splines with modified profiles. They are called gears because of the relatively large size of the teeth.

Gear couplings and universal joints are used in similar applications. Gear couplings have higher torque densities than universal joints designed to fit a given space while universal joints induce lower vibrations. The limit on torque density in universal joints is due to the limited cross sections of the cross and yoke. The gear teeth in a gear coupling have high backlash to allow for angular misalignment. The excess backlash can contribute to vibration.

Gear couplings are generally limited to angular misalignments, i.e., the angle of the spindle relative to the axes of the connected shafts, of 4-5°. Universal joints are capable of higher misalignments.

Advantages of Tanso gear coupling

1. Lowest price based on large scale production.

2. High and stable quality level.

3. Widely used in various mechanical and hydraulic fields.

4. Compensation for axial, radial and angular misalignment.

5. Convenient axial pl ing assembly.

6. No brittlement at low temperature.

7. Good slippery and frictional properties.

8. Resistance to chemical corrosion.

9. Rich experience working with big companies in this field.

Design advantages

The Flexible Coupling method of connecting rotating shafts is a vital and necessary technique. Large massive shafting, loosely mounted in sleeve bearings and merely joined together by rigidly bolted flanges, cannot provide efficient mechanical power transmission. Especially today, as machine designers and builders demand higher speeds, higher torques, and higher misalignment capacities, the need for “flexibly connecting” this equipment becomes apparent.

A flexible coupling is necessary since it is practically impossible to achieve and maintain perfect alignment of coupled rotating shafts. During initial assembly and installation, precise alignment of the shaft axes is not only difficult to achieve but in many cases it is economically unfeasible. During operation, alignment is even more difficult to maintain. Shaft misalignment – caused by uneven bearing wear, flexure of structural members, settling of foundations, thermal expansion, shaft deflection and other factors – is an operating certainty. Because these factors are extremely difficult to control, a flexible coupling serves as an ideal answer to compensate or minimize the effects of unavoidable misalignment and end movement of coupled shafts.

 

A flexible coupling must provide three basic functions:

1. Physically couple together two rotating shafts for efficient transmission of mechanical power, transferring the torque of one shaft to the other, directly and with constant velocity.

2. Compensate for all types of misalignment between rotating, connected shafts without inducing abnormal stresses and loads on connected equipment, and without tangible loss of power.

3. Compensate for end or axial movement of the coupled shafts, preventing either shaft from exerting excessive thrust on the other and allowing each to rotate in its normal position.

   

Three types of misalignment must be effectively accommodated by a flexible coupling.

1. Parallel Offset – axes of connected shafts are parallel, but not in the same straight line.

2. Angular – axes of shafts intersect at center point of coupling, but not in the same straight line.

3. Combined Angular-Offset – axes of shafts do not intersect at point of coupling and are not parallel.

  

Product description

 

Type	Nominal torque Tn /N·m	Bore diameter d1、d2	Bore length L		D	D1	D2	D3	D4	B	B1	F	H min	C		C2	Mass m/kg		Moment of inertia I/kg·m2
			Y	J1										Ⅰ	Ⅱ		Ⅰ	Ⅱ	Ⅰ	Ⅱ
WGT1	710	12、14	32	-	122	115	98	88	60	58	50	30	75	30	-	-	5.66	4.86	0.008	0.0063
		16、18、19	42	-										20	14	-
		20、22、24	52	-										10	4	-
		25、28	62	44										3	3	18
		30、32、35、38	82	60												12
		40、42	112	84												12
WGT2	1250	22、24	52	-	150	145	118	108	77	68	52	30	80	20	4	-	9.78	7.48	0.0021	0.0016
		25、28	62	-										10	3	-
		30、32、35、38	82	60										3		16
		40、42、45、48、50、55、56	112	84
WGT3	2500	22、24	52	-	170	165	140	125	90	80	54	30	80	33	7	-	16.7	12.2	0.047	0.033
		25、28	62	-										23	3	-
		30、32、35、38	82	60										3		25
		40、42、45、48、50、55、56	112	84												16
		60、63	142	107
WGT4	4500	30、32、35、38	82	-	200	195	160	145	112	90	58	30	100	13	3	-	25.6	19.6	0.098	0.073
		40、42、45、48、50、55、56	112	84										3		17
		60、63、65、70、71、75	142	107
		80	172	132
WGT5	7100	30、32、35、38	82	-	225	215	180	168	128	100	63	30	100	23	3	-	35	26.1	0.175	0.126
		40、42、45、48、50、55、56	112	84										3		19
		60、63、65、70、71、75	142	107
		80、85、90	172	132
WGT6	10000	32、35、38	82	-	245	230	200	185	145	112	67	30	100	35	5	-	51.6	38	0.295	0.213
		40、42、45、48、50、55、56	112	-										5		-
		60、63、65、70、71、75	142	107												20
		80、85、90、95	172	132
		100	212	167
WGT7	14000	32、35、38	82	-	272	265	230	210	160	122	74	30	120	45	5	-	68.6	45	0.53	0.35
		40、42、45、48、50、55、56	112	-										15		-
		60、63、65、70、71、75	142	107										5		20
		80、85、90、95	172	132
		100、110	212	167
WGT8	20000	55、56	112	-	290	272	245	225	176	136	81	30	120	29	5	-	79.5	55.8	0.71	0.46
		60、63、65、70、71、75	142	107										5		34
		80、85、90、95	172	132												20
		100、110、120、125	212	167
WGT9	25000	65、70、71、75	142	107	315	305	265	245	190	140	88	30	155	5	5	38	106.5	80.5	1.05	0.77
		80、85、90、95	172	132												28
		100、