Max-C® Coupling

Mac C Couplings

 

The MAX-C® resilient coupling is available in three styles-K2, WB and CB. Fourth style-UB (urethane cylindrical block design) has been 
superseded by the K2, but is still available for sale.

K2: Urethane wedge shaped blocks. Used on electric motor driving cranes, pumps, feed rolls, fans, conveyors bow thruster, manipulators, etc.

 

Product Cross Reference

 



WB: Rubber block in wedge shape. The rubber blocks come in various shore hardness and are typically custom-engineered for an application.
They are used on synchronous and variable frequency motors driving, for example:

 

  • Compressors
  • Klin drives
  • Steel mill main drives
  • Crushers
  • ID and FD fans

These come in a wide range of sizes and torque capacity.

CB: Rubber blocks are cylindrical shape also ,available in various hardness, like the WB design. They are available in various sizes and
torque ranges, typically custom-engineered.

They are primarily used in the following applications:

  • Diesel engines driving generator sets
  • Fire pumps
  • Torque converters
  • Marine drives
  • Drill rigs
  • Main propulsion

 

Features:

  • Provides resilience and damping for severe applications.
  • Can increase drive train and gear component life.
  • Does not need routine maintenance.
  • Available up to 79.5" (2.2M) OD.
  • Peak torque capacity of 56 million in-lb. (6383 kN-m).
  • Maximum bore up 34" (864mm).
  • Off-the-shelf and custom designed for application.
  • Resilient blocks available in rubber or urethane - depending on the application.
     

 

Max C Couplings
Max C Couplings
Max C Couplings

 

Additional Data

MAX-C® K2 COUPLING SPECIFICATIONS

Size Coupling Ratings(lbs.-in)   Max. Speed(RPM) Max. Bore (in.)
 Continuous  Peak  Balanced Not Balanced   Rigid(1)  Flex Hub
 2.0  28400  56800  6370  4250  4.50  3.13
 2.5  49800  99600  5460  3640  5.25  3.75
 3.0  73100  146200  4770  3180  6.00  4.38
 3.5  126000  252000  4090  2730  7.25  5.00
 4.0  189000  378000  3600  2400  9.63  6.00
 4.5  265000  530000  3180  2120  9.75  6.75
 5.0  362000  724000  2860  1910  10.50  7.25
 5.5  422000  844000  2560  1710  11.88  8.25
 6.0  630000  1260000  2330  1550  13.38  9.25
 7.0  819000  1638000  2150  1430  14.13  10.00
 8.0  1100000  2200000  1970  1310  14.88  11.00

 

MAX-C® UB COUPLING SPECIFICATIONS

Size Coupling Ratings(lbs.-in)   Max. Speed(RPM) Max. Bore (in.)
 Continuous  Peak  Balanced Not Balanced   Rigid(1)  Flex Hub
 1.5  4400  8800  6900  4600  2.62  1.75
 2.0  7600  15200  5900  3930  3.12  2.12
 2.5  13900  27800  4800  3200  3.88  2.62
 3.0  25200  50400  4100  2730  4.75  3.19
 3.5  44100  88200  3600  2400  5.75  3.81
 4.0  75600  151200  3000  2000  5.00  4.62
 5.0  135500  271000  2400  1600  6.25  5.62
 6.0  252100  504200  1950  1300  7.50  6.88
 7.0  378000
 756000  1760  1170  8.75  7.81

 

TABLE:1 MAX-C® COUPLING TYPE "CB"

 Coupling Size Max. Bore of Flex Hub(in.)  Peak Capacity(HP/100 RPM)   Peak Torque(lb.-in.) x 10 -3 Vibratory Torque(lb.-in.) x 10 -3   Max Speed (RP
M)
Number of Cavities   Number of Block
 1.5  1 3/4  7  4.41  .55  6900  10  10
 2  2 1/8  12  7.56  .95  5900  10  10
 2.5  2 5/8  22  13.86  1.73  4800  10  10
 3  3 3/16  40  25.2  3.15  4100  10  10
 3.5  3 13/16  70  44.1  5.51  3600  10  10
 4  4 5/8  120  75.6  9.45  3000  10  10
 5  5 5/8  220  138.6  17.33  2400  10  10
 6  6 7/8  400  252  31.5  1950  10  10
 7  7 13/16  600  378  47.25  1760  10  10
 8  8 5/8  800  504  63.0  1600  10  10
 9  9 7/8  1200  756  94.5  1400  10  10
 10  10 7/8  1600  1008  123.5  1265  10  10
 12  12 1/8  2200  1386  173.3  1150  10  10
 13  13 1/2  3000  1890  236.3  1110  12  24
 14  14 3/4  4000  2520  315.0  1030  12  24
 16  16 7/8  6000  3780  472.5  960  16  32

 

TABLE:2

 Coupling Size Max. Bore of Flex Hub(in.)  Peak Capacity(HP/100 RPM)   Peak Torque(lb.-in.) x 10 -3 Vibratory Torque(lb.-in.) x 10 -3   Max Speed (RP
M)
Number of Cavities   Number of Block
 2.5  3  40  25  3.1  4470  12  12
 3  3 1/2  72  46  5.8  3700  12  12
 3.5  4 1/4  140  88  11  3250  12  12
 4  5  200  127  16  2700  12  12
 4.5  5 1/4  330  210  26  2660  12  12
 5.5  6 7/8  530  330  41  2210  14  14
 6  7 7/8  800  500  62  2030  16  16
 6.5  8 1/2  1200  750  94  1840  16  32
 7  9 1/8  1600  1010  126  1710  16  32
 8  10 3/4  2150  1350  170  1560  18  36
 9  11 1/4  2650  1660  210  1470  18  36
 10  13 1/8  3850  2420  300  1320  20  40
 11  15  5300  3350  420  1200  20  40
 12  16  8200  5160  645  1100  22  44
 14  17 5/8  11500  7200  900  1020  24  48
 16  21 1/4  15000  9500  1190  880  24  72
 19  25  27200  17100  2140  750  28  84
 22  34  45000  28300  3540  580  32  96
 25  34  67000  42300  5290  580  32  160
 28  34  90000  56500  7060  580  32  192

 

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