Coupling

Overview

Crane coupling is a mechanical part used to connect two shafts so tha transmit motion and torque. Sometimes it is also used as a safety device to prevent the connected components from bearing excessive loads, serving as overload protection.

CTECH Machinery Sdn Bhd mainly produces universal joint coupling for hoist crane arm connection and drum type gear couplings, which meet European explosion-proof requirements, transmit greater torque, significantly reduce mass, and have low rotational inertia.

Application

1. Universal joint coupling:

● Metal, paper, and plastic manufacturing: with roller systems, fans, pumps, and mixers.

● Agricultural machinery: tractor facility

●  Mining equipment: drilling rigs

●  Crane electric system: sewage, irrigation and lift pumps

2. Drum type gear coupling:

● Metallurgical industry: rolling mills; blast furnaces

● Mining machinery: crushers; ball mills

● Petrochemical industry: pumps; compressors

● Power industry: steam; turbine generators

Material adopted:

Universal joint coupling: cast steel for foundry crane field; stainless steel for portal crane domain;

Drum type gear coupling: alloy structural steel

Usable characteristic:

● Universal joint coupling:

1) High dynamic balance accuracy and high-speed operation;

2) Various dynamic performance of buffering and vibration reduction

● Drum type gear coupling:

1) High load-bearing capacity and torque transmission capability;

2) Compensate for the offset between the transmission shafts to ensure smooth transmission

Technical data:

Sample image
Coupling name	Ball cage type universal joint coupling
Model	Nominal torque N.m	Fatigue torque N.m	Permissible axial angle	Extension amount	Moment of InertiaJ×10³(Kg.m²)
					Solid shaft		Steel tube shaft
					L min	L Every 100	L min	L Every 100
BHJ100E	7850	1840	12	±15	5.8	0.2
BHJ120E	11000	4000	12	±20	14.3	0.4
BHJ150E	17400	6300	12	±20	44.9	1.4	49.4	1.9
BHJ180E	37500	13700	10	±20	109.6	2.4	120.6	3.8
BHJ225E	68000	21000	10	2040	207.7	6.1	310.2	6
BHJ250E	80000	31000	10	+30 -40	463.3	7.7	599.2	24.1
BHJ285E	132000	48000	10	+30 -40	1019.2	18.2	1105	24.1
BHJ315E	150000	66500	8	+30 -45	1427.7	22	1501.5	24.1
BHJ350E	225000	90000	8	+30 -50	3049.8	39	3191.6	41.5
BHJ390E	312500	125000	8	+40 -60	5252.7	64.4	5609.1	78.4
BHJ440E	450000	180000	8	+40 -60	9610.2	111.4	10126	120.3
BHJ490E	625000	250000	8	+40 -60	1677.6	197.5	18379.2	271.3
BHJ550E	887500	355000	8	+50 -70	29866.3	325.9	30637.1	287.8
BHJ620E	1250000	500000	8	+50 -70	54975.3	545	57143	561.9

Sample image
Coupling name	Cross axis typeuniversal joint coupling
Type	Data item	58	65	75	90	100	120	150	180	200	225
A	Standard length (mm)	255	285	335	385	445	500	590	640	775	860
	Length compensation (mm)	35	40	40	45	55	80	80	80	100	120
	Weight (kg)	2.2	3.0	5.0	6.6	9.5	17	32	40	76	128
B	Standard length(mm)	150	175	200	240	260	295	370	430	530	600
	Weight (kg)	1.7	2.4	3.8	5.7	7.7	13.1	23	28	55	98
C	Standard length(mm)	128	156	180	208	220	252	340	348	440	480
	Weight (kg)	1.3	1.95	3.1	5.0	7.0	12.3	22	30	56	96
	Nominal torque(N·m)	150	200	400	750	1250	2500	4500	8400	16000	22000
	Fatigue torque(N·m)	75	100	200	375	630	1250	2250	4200	8000	11000
	Maximum deflection angle(°)	35	35	35	35	35	35	35	25	25	25
	D	52	63	72	92	100	112	142	154	187	204
	Df	58	65	75	90	100	120	150	180	200	225
	D1	47	52	62	74.5	84	101.5	130	155.5	170	196
	D2(H9)	30	35	42	47	57	75	90	110	125	140
	D3	38	38	4	50	60	70	89	102	114	140
	Lm	32	39	45	52	55	63	85	87	110	120
	k	3.5	4.5	5.5	6.0	8.0	8.0	10.0	12.0	14.0	15.0
	t	1.5	1.7	2.0	2.5	2.5	2.5	3.0	4.0	4.0	5.0
	n	4	4	6	4	6	8	8	8	8	8
	d	5.1	6.5	6.5	8.5	8.5	10.5	13	15	17	17
	MI(kg)	0.14	0.16	0.38	0.38	0.53	0.53	0.87	0.87	1.65	2.14
Flange bolt	size	M5	M6	M6	M8	M8	M10	M12	M14	M16	M16
	Tightening torque(N·m)	7	13	13	32	32	64	110	180	270	270

Sample image
Coupling name	Drum type gear coupling
Disc diameter D.	T	K	S	D3 Max.		Inertia Moment kg m2		Weight kg
				I	II	I	II	I	II
315	15	10	42	180	155	0. 116	0. 11	8.5	6. 7
355	15	10	54	200	175	0. 192	0. 178	11.4	9. 9
400	15	14	54	255	230	0. 32	0. 29	15.2	12.4
450	15	16	54	305	280	0. 55	0. 46	19.7	15.6
500	15	18	54	325	295	0. 83	0.71	25	20
560	15	18	54	350	320	1.28	1. 13	30. 7	25.6
630	15	20	54	400	360	2. 06	1.83	38.8	33
710	15	20	54	480	420	3. 32	2.9	46.5	39.4
800	15	24	70	540	500	5. 87	4.8	67.8	52.7
900	15	24	70	600	560	9.3	7.9	86.6	70.3
1000	20	30	80	620	560	17.4	15. 7	128.8	115. 1

Core technical parameters involved in ordering

1) Transmitting capability parameters

● Rated torque

● Maximum torque

● Torque rigidity

2) Alignment capability parameters

● Eccentricity

● Deviation angle

● Axial displacement

3) Structural dimension parameters

● Shaft hole diameter

● Outer diameter

● Length

● Keyway size

4) Environmental adaptability parameters

● Working temperature range

● Isolation effect

● Shock absorption capability

CTECH Machinery Sdn Bhd’s service

1) In harsh environments such as high dust or oil pollution, we will personally guide to ensure the correct operation of the coupling by customers and extend its lifespan.

2) In special large-scale projects, we can assist customers in monitoring the operation of the coupling to ensure that the radial and axial offsets of the coupling are within the allowable range.

1) If urgently needed, we can regularly replenish and replace lubricating grease on the lubrication parts of the couplings that customers have purchased.

CTECH’s coupling installed on 5t wire rope hoist. The existing couplings were worn off due to heavy duty usage