Floating Shafting

Floating Shafting

The KD4 Coupling is designed for medium and heavy duty applications. It only requires angular misalignment capacity as in the case of a three bearing installation of floating shaft arrangements. For complete floating shaft assemblies, consider a KD41. A KD41 uses two single KD4 flex halves in conjunction with a solid center shaft. KD42 designed as a drop-in replacement to gear coupling floating shafts. For lighter weight or higher stiffness, a tubular floating shaft is available.

With floating shafting for gear couplings, an unsupported floating shaft is used to span the gap between the driving and driven shafts. This is when the shafts are widely separated. The two couplings required at each end of that shaft consist of one half of a standard coupling bolted to a rigid hub. Each unit is called a Flex-Rigid Coupling. Usually the rigid hubs are mounted on the driving and driven shafts. This is so that the flex halves on the floating shaft may be replaced without disturbing the connected equipment.

 

Features & Benefits:

 

KD® Series Couplings

 

KD4 SINGLE FLEX


  • Sizes 103 - 905.
  • Heavy duty applications.
  • Designed for applications requiring angular misalignment only.
  • Three bearing system or floating shaft arrangements.
  • Drop-out unitized disc packs.
  • Used on KD41 & KD42 couplings.

KD41/42 FLOATING SHAFT


  • Sizes 103 - 905.
  • Max. bore up to 13.5".
  • Heavy duty applications.
  • Drop-out unitized disc packs.
  • Economical solid or tubular floating shafts.     
  • KD42 designed for direct gear coupling replacement.

KD42 TELESCOPIC DISC COUPLINGS


  • Standard KD disc coupling style.
  • Telescopic / slide design with off-the-shelf slides.
  • Can fit several shaft separation with one. 

 

Gear

 

FAST'S® Couplings


  • 300% greater lube capacity.
  • All-metal end rings.
  • 2 to 3 times the life vs. o-ring style.
  • 6" (152 mm) to 78" (2 m) OD.
  • Max. bore up to 36" (914 mm).
  • Coupling of choice with longest history.
  • Custom-design and specials available see catalog.

SERIES H


  • O-ring style seal.
  • Half for half interchangeable with all AGMA standard couplings.
  • Max. bore up to 43.5" (1.1 meter).
  • Max. torque up to 284 million lb-in (32100 kN-m).
  • Slide, shear pin, floating shaft, alloy steel, and other styles available.
  • Custom design and specials available

WALDRON® Couplings


  • High misalignment seal to prevent grease leakage.
  • Greater tooth contact than other spherical styles.
  • 40° tooth.
  • Max. bore up to 9.25" (235 mm).

 

Additional Data

KD4 Couplings use HT Disc Packs

 Size Max. Bore(in)  Coupling Rating(HP/100 RPM)  Torque Rating Continuous(in-lb)  Torque Rating Peak(in-lb)  Maximum Speed RPM  Total Weight(lbs) Total WR(lb-in2  Axial Capacity(in)
 103  1.75 6.3  4000 8000 18200  5.2  9.5   .040
 153 2.50 21.6  13600  27200  14800  11.4  38.5  .070 
 204 3.00  57.1  36000  72000  13000  24.1  124  .055 
 254 3.75  82.5  52000  104000  11200  32.2  212  .070 
 304 4.50  141  89000  178000  9900  50.5  462  .085 
 354 5.00  238  150000  300000  8800  78.5  980  .100 
 404 5.50 340  215000  430000  7800  188  1880  .113 
 454 6.38  405  255000  510000  7200  150  2780  .125 
 504 7.00  570  360000  720000  6600  197  4380  .138 
 554 7.75  800  505000  110000  6100  277  7250  .150 
 604 8.50  1050  660000  1320000  5600  348  10900  .160 
 705 10.75  2400  1510000  3020000  4500  625  30500  .135 
 805 12.00  3670  2310000  4620000  4000  915  57000  .155 
 905 13.50  4130  2600000  5200000  3600  1250  95000  .200 

 

KD41 & KD41T Floating Shafts

 Size Max. Bore(in)  Coupling Rating(HP/100 RPM)  Torque Rating Continuous(in-lb)  Torque Rating Peak(in-lb)  Total Weight(lbs) Total WR2(lb-in2  Axial Capacity(in)
 103  1.75 6.3  4000 8000 10.4  19  .080
 153 2.50 21.6  13600  27200  22.8 77 .140
 204 3.00  57.1  36000  72000  48.2 247 .110
 254 3.75  82.5  52000  104000  64.5 425 .140
 304 4.50  141  89000  178000  101 925 .170
 354 5.00  238  150000  300000  157 1960 .200
 404 5.50 340  215000  430000  237 3760 .225
 454 6.38  405  255000  510000  299 5550 .250
 504 7.00  570  360000  720000  395 8750 .275
 554 7.75  800  505000  110000  554 14500 .300
 604 8.50  1050  660000  1320000  697 21700 .320
 705 10.75  2400  1510000  3020000  1250 61000 .270
 805 12.00  3670  2310000  4620000  1830 114000 .310
 905 13.50  4130  2600000  5200000  2510 190000 .400

Data for two units with maximum bores. Weight and WR2  values do not include floating shaft or tube.

 

KD42 & KD42T Floating Shaft

 Size Flex Max. Bore(in)  Coupling Rating(HP/100 RPM)  Torque Rating Continuous(in-lb)  Torque Rating Peak(in-lb)  Axial Capacity(in) AF(in) BF(in)  EF(in)   Typical H(in) Typical T(in) 
 103 1.50 6.3  4000 8000 .080 3.94  2.35 1.69  1.50  2.36 
 153 2.12 21.6  13600  27200  .140  5.38 3.16 2.12  1.88 3.15 
 204 2.62 57.1  36000  72000  .110  6.38 4.04 2.75  2.62 3.62 
 254 3.25 82.5  52000  104000  .140  7.62 4.44 3.03  3.00 4.39 
 304 3.75 141  89000  178000  .170  9.00 5.00 3.59  3.50 5.67 
 354 4.25 238  150000  300000  .200  10.50 5.79 4.38  4.25 6.38 
 404 4.75 340  215000  430000  .225  11.75 6.62 5.19  4.75 6.75 
 454 5.50 405  255000  510000  .250 12.75 6.74 5.31  5.25 7.75 
 504 5.75 570  360000  720000  .275  13.88 7.46 6.03  5.75 8.00 
 554 6.25 800  505000  110000  .300 15.12 8.47 6.91  6.35 8.50 
 604 6.75 1050  660000  1320000  .320 16.50 8.22 7.41  6.75 9.25 
 705 8.50 2400  1510000  3020000  .270  20.50 9.50 8.69  8.50 11.50 
 805 9.50 3670  2310000  4620000  .310 23.00 11.00  9.81  9.50 12.50 
 905 11.50  4130  2600000  5200000  .400  25.50 11.82 10.88  11.00 15.50 

 

KD42S Slide Floating Shaft

 Size Coupling Rating(HP/100 RPM)  Torque Rating Continuous(in-lb)  Torque Rating Peak(in-lb)  AF(in) BF(in)  T(in)   Total Slide(in)   Axial Adjustment(in) 
 204 57.1  36000  72000  6.38 4.04  3.62 4.33  1.50 
 254 82.5  52000  104000  7.62 4.44  4.09 4.33  1.50 
 304 141  89000  178000  9.00 5.00  5.67 4.33  1.50 
 354 238  150000  300000  10.50 5.79  5.67 4.33  1.50 
 404 340  215000  430000  11.75 6.62  6.50 4.33  1.50 
 454 405  255000  510000  12.75 6.74  6.50 4.33  1.50 
 504 570  360000  720000  13.88 7.46  8.58 5.31  2.00 
 554 800  505000  110000  15.12 8.47  8.58 5.31  2.00 

 

 

Related Documents
Floating Shafting
Floating Shafting

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