An ISO 9001:2015 Company

Roller Chain Flexible Couplings

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.

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.

Stock couplings 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.

NU-TECK COUPLING COVERS PLASTIC / ALUMINIUM
Coupling No. ASA No. A B Wt. Kg.
NT 6112 3812 69 59 0.2
NT 8312 4012 75 68 0.2
NT 8316 4016 90 70 0.4
NT 1016 5016 114 86 0.6
NT 1018 5018 123 90 0.8
NT 1218 6018 149 93 1.2
NT 1222 6022 173 110 1.6
NT 1618 8018 195 135 2.3
NT 1622 8022 222 134 2.4
NT 2020 10020 258 174 3.4
NT 2418 12018 292 218 5.9
NT 2422 12022 340 212 7.3
NT 3218 16018 385 250 14

SELECTION OF THE SIZE OF THE COUPLINGS

  • Decide service factor for the unit for which the chain coupling is to be fitted by considering the hours of service,
    type of power unit etc. from the following table :-

    Service
    Classification
    Driven equipment Source of power
    kinds characteristics Electric motor
    or steam
    turbine
    Steam or
    gasoline
    engine 4 or
    more cyl.
    Diesel or Gas
    Engine
    A Centrifugal fans, blowers of pumps
    conveyor evenly loaded.
    Even load - 8 hours/day service, Non-reversing-low
    torque starting.
    1 1.5 2.0
    B 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 2.0 2.5
    C 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 2.5 3.0

    For 8 to 16 hrs/day service use next step service factor.
    For 16 to 24 hours/day service use service factor two step higher loading.
  • Multiply horsepower of driver unit by the service factor. This is design horsepower.
  • Note the maximum rpm. at which the unit will run and its shaft diameter.
  • 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.
  • 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.

H. P. RATINGS.

Coupling
No.
Equisasa
No.
Max
Bore
Revolution Per Minute
1 5 10 25 50 100 200 300 400 500 600 800 1000 1200 1500 1800 2000 2500 3000 3600 4000 4800 5200 6000
NT 6112 3812 16 0.013 0.066 0.146 0.346 0.693 1.053 1.613 2.106 2.520 3.013 3.440 4.253 5.173 5.880 7.133 8.333 8.973 10.82 12.58 14.66 16.00 18.86 19.73 22.26
NT 8312 4012 22 0.026 0.146 0.146 0.773 1.533 2.306 3.506 4.613 5.533 6.613 7.560 9.346 11.38 12.90 15.46 18.26 19.73 23.56 27.60 32.13 35.06 41.06    
NT 8316 4016 32 0.053 0.280 0.546 1.373 2.746 4.120 6.253 8.226 9.880 11.80 13.46 16.66 20.40 23.06 28.00 32.53 35.06 42.53 49.33 57.33 62.53 73.20    
NT 1016 5016 42 0.106 0.520 1.040 2.600 5.213 7.813 11.89 15.60 18.80 22.40 25.60 31.73 38.53 43.86 53.20 61.86 66.66 80.80 93.86 108.80        
NT 1018 5018 48 0.133 0.666 1.320 3.306 6.600 9.906 15.06 19.86 23.73 28.40 32.53 40.13 48.80 55.46 66.733 78.40 84.53 102.40 118.13          
NT 1218 6018 60 0.240 1.240 2.493 6.226 12.44 18.66 28.40 37.33 44.80 53.46 61.20 75.73 92.13 104.53 126.93 148.0 160.0 193.33            
NT 1222 6022 76 0.333 1.666 3.346 8.413 16.66 25.06 38.13 50.26 60.40 72.13 82.53 102.0 124.13 140.0 170.66 198.66 214.66 260.0            
NT 1618 8018 80 0.546 2.760 5.520 13.73 27.60 41.33 62.93 82.80 99.33 118.66 134.66 168.0 204.0 232.0 281.33 328.0 353.33              
NT 1622 8022 95 0.786 3.946 7.906 19.73 39.46 59.33 89.60 118.66 141.33 169.33 194.66 240.0 292.0 332.0 402.6 469.33 505.33              
NT 2020 10020 110 1.240 6.213 12.44 31.06 62.13 93.33 141.33 166.66 224.0 266.66 305.33 377.33 460.0 522.66 634.66 738.66                
NT 2418 12018 119 1.866 9.360 18.66 46.80 93.60 140.0 213.33 280.0 336.0 402.6 460.0 568.0 692.0 786.86 954.66                  
NT 2422 12022 150 2.413 12.09 24.13 60.40 120.93 181.33 274.66 362.66 434.66 520.0 594.66 734.66 894.66 1016.0                    
NT 3218 16018 160 4.040 20.13 40.40 101.06 201.33 302.66 460.0 606.66 728.0 869.33 994.66 1229.3 1496.0                      
NT 3222 16022 199 5.906 29.46 59.06 146.66 294.66 444.00 674.66 886.68 1065.3 1272.0 1453.3 1800.0 2186.6                      
NT 4018 20018 205 8.080 40.40 80.80 201.33 404.00 605.33 921.33 1212.0 1453.3 1733.3 1986.6 2453.3                        
NT 4022 20022 260 10.17 50.93 101.73 254.66 509.33 762.66 1161.33 1520.0 1826.6 2186.6 2506.6                          

LUBRICATION
Couplings operating without covers under fairly clean conditions will give satisfactory service providing they are periodically (weekly) brushed throughly with ball bearing grease of medium consistency. Couplings operating with covers should be kept filled with a good quality ball bearing grease of soft or medium consistency.

Coupling
No.
ASA
No.
Bore T t W C D Wt.Kg.
Min. Max.
NT 6112 3812 10.00 16 65 30 5.0 27 45 0.30
NT 8312 4012 10.00 22 79 36 7.0 35 60 0.80
NT 8316 4016 12.00 32 79 36 7.0 50 77 1.60
NT 1016 5016 16 42 96 44 8.0 61 96 2.60
NT 1018 5016 16 48 98 45 8.0 71 106 3.50
NT 1218 6018 20 60 121 56 9.0 88 126 6.5
NT 1222 6022 20 76 121 56 9.0 110 150 10.0
NT 1618 8018 25 80 150 67 16 115 170 14.5
NT 1622 8022 25 95 150 67 16 140 201 20.0
NT 2020 10020 40 110 200 91 18 157 231 33.5
NT 2418 12018 50 119 260 118 24 169 254 51.0
NT 2422 12022 50 150 260 118 24 208 301 76.0
NT 3218 16018 50 160 360 165 30 220 341 121.0
NT 3222 16022 50 199 360 165 30 280 410 210.0
NT 4018 20018 60 205 517 240 37 295 425 320.0
NT 4022 20022 60 260 517 240 37 373 507 470.0