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Roller
Chain Flexible Coupling |
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NU-TECK Roller chain Flexible
Couplings are compact, all steel, long lasting
flexible couplings, capable of transmitting relatively
high torques with minimum of space consumption.
Consequently, they provide a most economical means
of positive transmission of power from one shaft
to another.
The simple design and construction
of these couplings make them extremely easy to
install and disconnect, providing additional economy
of operation.
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The sprockets are identical in
construction, thus providing a balanced unit in
operation and reducing effects of vibration. In
addition, the flexibility of roller chain plus
clearance between the chain rollers and sprocket
teeth allow for slight misalignment and shaft
end float.
Coupling sizes will usually
meet most power transmission requirements. However
when necessary special couplings can be furnished
on a made to order basis to suit a particular
application. In such cases, complete information
should be given when requesting a recommendation
or quotation. This includes horsepower and RPM
requirements, hub dimensions, bore and keyway
sizes, and general operating conditions.
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CHAIN
COUPLING SIZE
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ASA
NO.
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BORE
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T
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t
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W
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C
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D
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Wt.
Kg.
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MIN.
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MAX.
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NT 6112
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3812
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10.00
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16
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65
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30
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5.0
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27
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45
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0.30
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NT 8312
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4012
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10.00
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22
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79
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36
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7.0
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35
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60
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0.80
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NT 8316
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4016
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12.00
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32
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79
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36
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7.0
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50
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77
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1.60
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NT 1016
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5016
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16.00
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42
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96
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44
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8.0
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61
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96
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2.60
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NT 1018
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5018
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16.00
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48
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98
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45
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8.0
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71
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106
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3.50
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NT 1218
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6018
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20.00
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60
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121
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56
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9.0
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88
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126
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6.5
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NT 1222
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6022
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20.00
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76
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121
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56
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9.0
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110
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150
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10.0
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NT 1618
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8018
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25
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80
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150
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67
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16
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115
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170
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14.5
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NT 1622
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8022
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25
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95
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150
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67
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16
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140
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201
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20.0
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NT 2020
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10020
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40
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110
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200
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91
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18
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160
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231
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33.5
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NT 2418
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12018
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50
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119
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260
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118
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24
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169
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254
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51.0
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NT 2422
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12022
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50
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150
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260
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118
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24
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208
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301
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76.0
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NT 3218
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16018
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50
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160
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360
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165
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30
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220
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341
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121.0
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NT 3222
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16022
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50
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199
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360
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165
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30
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280
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410
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170.0
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NT 4018
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20018
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80
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205
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517
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240
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37
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295
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425
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425.0
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NT 4022
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20022
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80
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260
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517
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240
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37
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373
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507
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450.0
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NU-TECK
COUPLINGS COVERS PLASTIC / ALUMINIUM |
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Aluminium
covers are available for all the sizes. Plastic covers
are available only for sizes upto NT-1218. |
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CHAIN COUPLING SIZE
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ASA NO.
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A
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B
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Wt. Kg.
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NT 1618
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8018
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195
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130
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2.3
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NT 1622
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8022
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220
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132
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2.4
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NT 2020
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10020
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258
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178
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3.4
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NT 2418
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12018
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292
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220
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5.9
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NT 2422
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12022
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340
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220
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7.3
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NT 3218
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16018
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385
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240
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14
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NT 3222
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16022
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472
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250
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17
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NT 4018
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20018
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496
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280
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22
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NT 4022
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20022
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578
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280
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26
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CHAIN COUPLING
SIZE
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ASA NO.
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A
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B
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Wt. Kg.
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NT 6112
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3812
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69
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59
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0.2
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NT 8312
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4012
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75
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68
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0.2
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NT 8316
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4016
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90
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70
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0.4
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NT 1016
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5016
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110
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86
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0.6
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NT 1018
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5018
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121
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86
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0.8
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NT 1218
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6018
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149
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90
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1.2
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NT 1222
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6022
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173
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110
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1.6
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SELECTION
OF THE COUPLINGS
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1. |
Decide service factor for the unit for which
the chain coupling is to be fitted by considering
the hours of service, type of the power unit etc.
from the following table -
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Driven Equipment
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Source of Power
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| Service
classifi-cation |
Kinds |
Characteristics |
Electric
motor or steam turbine |
Steam
or gasoline engine 4 or more cyl. |
Diesel
or Gas Engine. |
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A
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Centrifugal
Fans, blowers of pumps conveyor evenly
loaded. |
Even load
- 8 hours/day service, Non-reversing-low
torque starting. |
1
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1.5
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2.0
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B
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Compressor,
conveyor, pulsating load machines, kilns
and driers, speeds reducers, Multi cylinder
pumps, wood working machines etc. |
Uneven
load - 8 hours / day service, moderate
shock or torsional loads, non-reversing.
This is the most common type of service. |
1.5
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2.0
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2.5
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C
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Presses,
crushers, impact loads, oil well pumping
equipment. |
Heavy
shock load - 8 hours / day service,
high peak torsional loads. Reversing
under load. Full load starting. |
2.0
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2.5
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3.0
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For 8 to 16 hrs/day service use next step service
factor.
For 16 to 25 hours/day service use service factor
two step higher loading.
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2. |
Multiply horsepower
of driver unit by the service factor. This is the
design horsepower. |
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3. |
Note the maximum rpm.
at which the unit will run and its shaft diameter. |
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4. |
From H.P. rating table select the coupling size
which is rated equal to or slightly greater than
design H.P. required at the rpm. at which the
coupling is to operate.
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5. |
Also make sure that the diameter at the shaft
is less than the maximum bore permissible on the
coupling. If the coupling is not large enough
to accommodate the shaft size, use the next coupling
which can be bored to suit the shaft requirement.
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Lubrication |
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Couplings operating without cover under
fairly clean conditions will give satisfactory service
providing they are periodically (weekly) brushed thoroughly
with ball grease of medium consistency. Couplings operating
with covers should be kept filled with a good quality
ball bearing grease of soft or medium consistency.
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