HRC Couplings

A semi-elastic flexible coupling designed for use with machinery driven by standard IEC motors

"HRC" is a registered trademark of the Fenner Group, but has become a widely used, generic term, to describe this coupling design.

HRC couplings consist of 2 cast-iron halves attached to shafts by means of either hub mount (H Flange) or face mount (F Flange) taper bushes.

Between these two halves is a rubber "spider" that serves as a shock absorber

HRC Couplings allow for a limited parallel misalignment (0.5mm) and axial misalignment (1.5mm).

Can be used on shafts with taper bushes to 90mm bore or shafts up to 130mm if bored through with keyway.


#
HRC_Coupling_Dims.JPG

Basic coupling dimensions

Coupling NoNominal torqueOverall dia.Hub dia.ElementParallel misalignmentWeightAssembled length
Ring dia.Width
ABGFF,FH,HH
Nmmmmmmmmmmmkgmm
703169603118.50.3165.5
908085703222.50.31.1769.5
1101601121004529.50.3582.5
1303151301055036.50.45.4689.5
1506001501156240.50.47.11107.5
1809501801257749.50.416.65142.5
23020002251559959.50.526.05164.5
280315027520611974.50.550.05207.5

Suitable taper bush and shaft sizes

Coupling NoMaximum boreShoulder width
DC
mminmmmm
7010082512023.5
901108281.1/819.523.5
1101610421.5/818.526.5
1301610421.5/81826.5
150201250223.533.5
1802517602.1/234.546.5
230302075339.552.5
280352510045166.5


Selection of HRC Couplings

1. Design power = motor power x service factor

2. Select suitable coupling based on shaft speed and power from the table below

3. Check that this coupling can accommodate taper bushes big enough for your shaft, if not select a larger coupling.


Service factor

Electric motorsInternal Combustion Engines
Hours/day<88-16>16<88-16>16
Uniform load11.121.251.251.41.6
Moderate shock1.61.8222.242.5
Heavy shock2.52.83.123.123.554


Coupling power ratings

SpeedCoupling size
rpm7090110130150180230280
1000.330.841.683.36.289.9520.933
2000.661.683.356.612.619.941.965
4001.323.356.713.225.139.883.8132
6001.985.0310.119.837.759.7126198
7202.376.0312.123.845.271.6151238
8002.646.713.426.450.379.6168264
9603.178.0416.131.760.395.5201317
12003.9610.120.139.675.4119251396
14404.7512.124.147.590.5143302475
16005.2813.426.852.8101159335528
18005.9415.130.259.4113179377594
20006.616.833.566126199419660
22007.2618.436.972.6138219461726
24007.9220.140.279.2151239503
26008.5821.843.685.8163259545
28809.524.148.395181286
30009.925.150.399188298
360011.930.160.3118226
Nominal torque31.58016031560095020003150
Max torque (Nm)721803607201500235050007200


#

Associated Products


Do you have a special project?

Need some advice? We can help!


oemsales@nbcgroup.co.uk

01952 222300