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Coupling selection process
  1. 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
  2. If a suitable selection factor is not available from table 1 then select a factor from the load/service factor classifications from table 2.
  3. 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').
  4. Multiply the kW/rpm from step 1 by the required service factor from step 2 or 3.
  5. Select a coupling from table 3 using the above results from the kW/rpm power rating column.
Check that:
  1. The operating speed of the coupling does not exceed the maximum rpm rating (Max rpm Table 3).
  2. That the selected coupling is designed to accept the largest shaft size (Max bore mm Table 3).
  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.
  4. When installing the coupling check that the angular and parallel alignments are within tolerance by checking Figure 1-1 (The tolerance of installation).
  5. 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:
  1. To calculate torque = kW x rpm/9550 = required torque Nm
  2. 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').
  3. Select the coupling by using the total calculated torque capacity Nm from table 3.
  4. 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
Agitator1.5 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
RunningService Factor
Continuous running with light loads with little load variation1.0
Variations in torque load and speed when equipment is operating1.5
Variations in torque load and speed with frequent stop/start cycles 2.0
Shock/impact loading and high torque variations are encountered2.5
For heavy shock/impact loading or for light reverse drives3.0
Frequent reversing torqueloads or reverse cycles with heavy loadConsult 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

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°CService 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

10_coupling_9 (4K)
The Method of Assembly
10_coupling_10 (50K)
  1. Adjust the face of A and A' at the same space
  2. Adjust hubs minimum shaft spacing. Reference Table 3
  3. Assemble the bolts in the order of 2-2', 5-5', 3-3', 4-4', 6-6'
  4. Assemble the bolts in the middle part of the edge
  1. Adjust the face of A and A' at the same space
  2. Adjust hubs minimum shaft spacing. Reference Table 3
  3. Assemble the bolts in the order of 2-2', 7-7', 3-3', 6-6', 1-1', 4-4', 8-87', 5-5'
  4. Assemble the bolts in the middle part of the edge

The tolerance of installation
10_coupling_11 (20K)
Back to Coupling


See Also:


JAW
NYLGEAR
HRC
ROTRANS
Tyre Flexible
KC Chain
Engineering Services

  1. Shaft Coupling specialists & specialist engineers/manufacturers
  2. Coupling design & manufacture
  3. CNC production capabilities
  4. Bore & Keyway services
  5. Taper Lock boring & supply
   
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