I-trans - Power and Gear & Transmission Manufacturers

Products>Coupling >MaxDynamic

PRINTABLE VERSION

Coupling selection process

Calculate the kW rating per rpm required ( kW required rpm). Select a suitable service factor from Table 1 and take into consideration both the drive and driven equipment
If a suitable selection factor is not available from table 1 then select a factor from the load/service factor classifications from table 2.
If a temperature rating factor is required select it from Table 4 and add it to step 2 or 3. (For further information please read step 5. in 'check that').
Multiply the kW/rpm from step 1 by the required service factor from step 2 or 3.
Select a coupling from table 3 using the above results from the kW/rpm power rating column.

Check that:

The operating speed of the coupling does not exceed the maximum rpm rating (Max rpm Table 3).
That the selected coupling is designed to accept the largest shaft size (Max bore mm Table 3).
If the hubs are to be bored for taper lock bushes check that the outside diameter of the hub and length will accept the required size taper lock.
When installing the coupling check that the angular and parallel alignments are within tolerance by checking Figure 1-1 (The tolerance of installation).
As the polyurethane element and steel are subjected to higher temperatures they will lose strength particularly the element. Therefore an additional service factor is required and for colder temperatures particularly extremes up to +1.00 can be added.

To calculate operating torque:

To calculate torque = kW x rpm/9550 = required torque Nm
Multiply the torque (Nm) by the service factor from table 1 or 2 and if a temperature rating factor is required add this on from table 4 (Read step 5 'check that').
Select the coupling by using the total calculated torque capacity Nm from table 3.
Proceed through the 'check that list'.

MAX DYNAMIC Shaft Coupling

Table 1. Recommmended service factors for Couplings in industrial applications Load/Service Factor Classification

General Application	Service Factor	General Application	Service Factor
Agitator	1.5	Aggregate Processing Cement	2.0 - 3.0
Blower	1.0 - 1.5	Brewery and Distilling	1.0 - 2.0
Compressor	1.0 - 2.0	Food Industry	1.0 - 2.0
Conveyor	1.25 - 1.5	Lumber Industry	1.5 - 2.5
Cranes and Hoists	2.0 - 2.5	Power & Oil Industry	1.0 - 2.5
Elevators	1.0 - 2.0	Pulp & Paper Mills	1.0 - 3.5
Fans	1.0 - 2.0	Rubber Industry	1.0 - 3.0
Generators	1.0 - 2.5	Steel Industry	2.0 - 4.5
Pumps	1.0 - 1.5	Textile Industry	1.0 - 2.0

Table 2.Load/Service Factor Classification

Running	Service Factor
Continuous running with light loads with little load variation	1.0
Variations in torque load and speed when equipment is operating	1.5
Variations in torque load and speed with frequent stop/start cycles	2.0
Shock/impact loading and high torque variations are encountered	2.5
For heavy shock/impact loading or for light reverse drives	3.0
Frequent reversing torqueloads or reverse cycles with heavy load	Consult I-Trans

For a reciprocating power source or load add the following to the selected service factor:
Single cylinder IC engine or equipment = 1.00 Multi cylinder IC engine or equipment = 0.5

10_coupling_7 (30K)

Max Dynamic Coupling No.	Torque Capacity Nm	Max Bore (mm)	Max R.P.M.	Power Rating (kw/rpm)	Dimensions
					A	B	C	D	E	F
					Out Diam	Hub Length	Min Shaft Spacing	Max Shaft Spacing	Hub Diam	Total Length
					Out Diam	Hub Length	Min Shaft Spacing	Max Shaft Spacing	Hub Diam	IN	Out
D-2	21.5	28	7500	0.002	89	24	35	47	47	83	95
D-3	41.2	34	7500	0.004	102	37	9	47	59	83	121
D-4	62.7	42	7500	0.007	116	37	9	47	66	83	95
D-5	107.9	48	7500	0.011	137	45	10	52	80	100	142
D-10	163.8	55	7500	0.017	162	45	11	53	93	101	143
D-20	262	60	6600	0.027	184	50	15	63	114	115	163
D-30	413	75	5800	0.043	210	56	12	68	138	124	180
D-40	621.9	85	5000	0.066	241	61	12	74	168	134	196
D-50	865	90	4200	0.09	279	69	12	86	207	150	224
D-60	1412.64	105	3800	0.148	318	80	11	99	222	171	259
D-70	2486	120	3600	0.262	356	85	18	109	235	189	281
D-80	4463	155	2000	0.467	406	114	17	149	286	245	377

Temperature Service Factor table 4

-40°+93°C	Service factor adjustments (temp)
65°C	+0.25
75°C	+0.50
85°C	+0.75
90°C	+1.00

Recommended Cap Screw Torque

The element locking bolts are coated with adhesive so it is recommended that the bolts are not used more than twice before they are re-coated with adhesive (a suitable loctite?)
Always leave the cap screw and associated threads lubrication free to insure secure locking
Assemble the Max Dynamic Coupling as per the method of assembly pictured below

The Method of Assembly
10_coupling_10 (50K)

Adjust the face of A and A' at the same space
Adjust hubs minimum shaft spacing. Reference Table 3
Assemble the bolts in the order of 2-2', 5-5', 3-3', 4-4', 6-6'
Assemble the bolts in the middle part of the edge

Adjust the face of A and A' at the same space
Adjust hubs minimum shaft spacing. Reference Table 3
Assemble the bolts in the order of 2-2', 7-7', 3-3', 6-6', 1-1', 4-4', 8-87', 5-5'
Assemble the bolts in the middle part of the edge

The tolerance of installation
10_coupling_11 (20K)

Back to Coupling