Rotex Type Couplings

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TYPE -GR TYPE -GS

GR couplings are the three piece assembly of 2 no. Aluminium Alloy Cast Iron or Steel hubs and one Special Grade Polyurethane Spider. These three pieces are co-axially assembled to complete the GR coupling. After assembly these couplings becomes sufficient flexible, positive motion and power transmitting fail safe coupling elements. Due to polyurethane spider, both the metallic hubs are separated from each other to avoid there physical contact. This helps to avoid the electrical and frequency isolation of both the connected driver and driven elements.

Applications:

Pumps, Cooling Towers, Conveyers, Rolling Mills, Hyd. Power Packs Crane, Hoist, Gear Box & Motors, Textile Machine, Special Purpose Machine And many more

Benefits:

Flexible, No maintenance, No Lubrication, Failsafe,Uniform & Positive motion and power transmission, Electrical and frequency isolation, Available in Unbored, pilot bore and finish bore and key-ways.

GR Couplings

GR Hub

GR Spider

Download Catalogue

TYPE - GR

HUB DETAILS:

  • GR hubs are available in Aluminium, Cast Iron and Steel Material.
  • GR sizes from 19 to 28 are made from Aluminium Alloy & Steel material.
  • GR sizes from 38 to 90 are made from Cast Iron & Steel Material.
  • GR hubs are manufactured with high precision machining.
  • The jaws are machined with concave shape and entry chamfer for easy assembly.
  • The concave shape in jaws of hub and the convex shape on the polyurethane spider allows for better angular, parallel and axial misalignment.
  • These hubs are available in un-bored, pilot bored, finish bore & key-ways, and with different styles of clamping arrangements as per customer requirements.

SPIDER DETAILS:

  • GR spiders are manufactured from high grade polyurethane.
  • GR are available in three different hardness as 64 Shore A, 92 Shore A, and 98 Shore A. This different hardness’s are made available to suit different applications.
  • The details are as below.
Spider Type Colour Material  Temperature Range " C Available sizes Application
Shore Hardness     Normal working Maximum    
64 Shore A Green Polyurethane from -50 to + 80 from -60 to + 120 GR 19 to 90 More Vibration
92 Shore A Yellow Polyurethane from -40 to + 90 from -50 to + 120 GR 19 to 90 Medium torque
98 Shore A Red Polyurethane from -30 to + 90 from -40 to + 120 GR 19 to 90 More torque

Dimentional Details:

Size PUFIex GR Bore Sizes mm Minimum  Maximum   Overall Dimentions
Outer Dia. Hub Dia. Spider I.D. Total Length Std. / Large Hub Total Length Extra Long Hub Hub Length Hub Length Hub Length Space Bet" Hubs Spider Width Isolation Gap
Std. Hub Large Hub
  dl d2 d2 D D1 d3 L L Std. L1 Extra Long L1 L2 E b a
GR 19 6 19 24 41 32 18 66 90 25 37 20 16 12 2.0
GR 24 9 24 28 56 40 27 78 118 30 50 24 18 14 2.0
GR 28 10 28 38 66 48 30 90 140 35 60 28 20 15 2.5
GR 38 12 38 48 80 66 38 114 164 45 70 37 24 18 3.0
GR 42 14 42 55 95 75 46 126 176 50 75 40 26 20 3.0
GR 48 15 48 62 105 85 51 140 188 56 80 45 28 21 3.5
GR 55 20 55 74 120 98 60 160 210 65 90 52 30 22 4.0
GR 65 22 65 80 135 115 68 185 235 75 100 61 35 26 4.5
GR 75 30 75 95 160 135 80 210 260 85 110 69 40 30 5.0
GR 90 40 90 110 200 160 100 245 295 100 125 81 45 34 5.5

Technical Data:

Size PUFIex GR Rated Torque Nm Maximum RPM Max. Misalignment Dynamic Torsional Stiffness 103 Nm/rad Weight Kg Moment of Inertia Kgm²
Axial mm Radial mm Angular Deg
98 Sh-A 92 Sh-A 64 Sh-D 98 Sh-A 92 Sh-A 64 Sh-D
GR 19 17 10 21 16700 1,2 0.2 1.2 2.92 1.28 5.35 0.51 0.000121
GR 24 60 35 75 12100 1.4 0.22 0.9 9.93 4.86 15.11 1.10 0.000466
GR 28 160 95 200 10100 1.5 0.25 0.9 26.77 10.90 27.52 1.80 0.00107
GR 38 325 190 405 8300 1.8 0.28 1.0 48.57 21.05 70.15 2.50 0.00171
GR 42 450 265 560 7000 2.0 0.32 1.0 54.50 23.74 79.86 3.90 0.00476
GR 48 525 310 655 6350 2.1 0.36 1.1 65.29 36.70 95.51 5.30 0.00805
GR 55 685 410 825 5500 2.2 0.38 1.1 94.97 50.72 107.92 7.90 0.01564
GR 65 940 625 1175 4950 2.6 0.42 1.2 129.51 97.13 151.09 11.90 0.03071
GR 75 1920 1280 2400 4150 3.0 0.48 1.2 197.50 113.32 248.22 18.60 0.06706
GR 90 3600 2400 4500 3300 3.4 0.5 1.2 312.20 190.09 674.52 33.60 0.22139

GS Couplings are the three piece assembly of 2 no. Aluminium Alloy or Steel hubs and one Special Grade Polyurethane Spider. These three pieces are co-axially and with certain positive pre-stress are assembled to complete the coupling. After assembly these couplings becomes sufficient flexible, backlash-free, positive motion and power transmitting fail safe coupling elements. Due to polyurethane spider, both the metallic hubs are separated from each other to avoid there physical contact. This helps to avoid the electrical and frequency isolation of both the connected driver and driven elements.

Applications:

Shaft Encoders, Tacho-generators, Servo Motors, Stepper Motors, Ball-screws, CNC machines, X-V slides, Medical Equipment's, Precise Spindles, and much more precise backlash-free motion and power transmission applications.

Benefits:

Flexible, Backlash-free, No maintenance, No Lubrication, Failsafe,Uniform & Positive motion and power transmission, Electrical and frequency isolation, Available in Unbored, pilot bore and finish bore and key-ways.

GS Couplings

GS Hub

GS Spider

Download Catalogue

TYPE - GS

HUB DETAILS:

  • GS hubs are available in Aluminium and Steel Material.
  • GS sizes from 9 to 38 are made from Aluminium Alloy material.
  • GS sizes from 42 to 65 are made from Steel.
  • Hubs are manufactured with high precision machining.
  • The jaws are machined with concave shape and entry chamfer for easy assembly.
  • The concave shape in jaws of hub and the convex shape on the polyurethane spider allows for better angular, parallel and axial misalignment.
  • These hubs are available in un-bored, pilot bored, finish bore & key-ways, and with different styles of clamping arrangements as per customer requirements.

SPIDER DETAILS:

  • GS spiders are manufactured from high grade polyurethane.
  • GS are available in three different hardness as 80 Shore A, 92 Shore A, and 98 Shore A. This different hardness's are made available to suit different applications.
  • The details are as below.
Spider Type Colour Material Temperature Range ° C Available sizes Application
Shore Hardness     Normal working Maximum    
80 Shore A Blue Polyurethane from -50 to + 80 from -60 to + 120 PUFIex 5 to 24 Low torque, more mis-alignment
92 Shore A Yellow Polyurethane from -40 to + 90 from -50 to + 120 PUFIex 5 to 55 Medium torque, medium mis-alignment
98 Shore A Red Polyurethane from -30 to + 90 from -40 to + 120 PUFIex 5 to 55 More torque, less mis-alignment

Dimentional Details:

Size PUFIex Bore Sizes mm Overall Dimentions Set Screw Type Clamping Hub Type Screw
Minimum Maximum Outer Spider Total Hub Space Bet" Spider Isolation Spider Wall Screw Distance Screw Distance Max. Tightening
Set Screw Clamping Dia. I.D. Length Length Hubs Width Gap Thickness Size from edge Size from edge Dia. Torque
  dl d2 d2 D d3 L I1 &I2 E b g a S I3 S I4 Dmax Ts Nm
GS 9 4 11 9 20 7 30 10 10 8 1 1.5 M4 5 M3 5 23.4 1.5
GS 14 6 16 14 30 10.5 35 11 13 10 1.5 2 M4 5 M3 5 32.2 1.5
GS 19/24 6 24 24 40 18 66 25 16 12 2 3 M5 10 M6 12 45.5 10.5
GS 24/28 8 28 28 55 27 75 30 18 14 2 3 M5 10 M6 12 56.4 10.5
GS 28/38 10 38 38 65 30 90 35 20 15 2.5 4 M6 15 M8 14 72.6 10.5
GS 38/45 12 45 45 80 38 114 45 24 18 3 4 M8 15 M8 20 83.3 25
GS 42 14 55 X 95 46 126 50 26 20 3 4 M8 20 M8 20 79 25
GS 48 15 62 X 105 51 140 56 32 28 3.5 4 M8 20 M10 22 91 70
GS55 20 70 X 120 60 160 65 30 22 4 4.5 M10 20 M12 25 105 120

Technical Data:

Size Spider Rated Max RPM Dynamic Torsional Radial Weight Moment of
  Hardness Torque Set Screw Clamping Hub Stiffness Stiffness   Inertia
    Nm     N m/ rad N/mm Kg Kgcm2
GS 9 80 Shore A 1.8 28000 22500 52 125 0.019 0.011
GS 9 92 Shore A 3 28000 22500 95 262 0.019 0.011
GS 9 98 Shore A 5 28000 22500 155 518 0.019 0.011
GS 14 80 Shore A 4 15900 12700 180 153 0.05 0.062
GS 14 92 Shore A 7.5 15900 12700 344 336 0.05 0.062
GS 14 98 Shore A 12.5 15900 12700 513 604 0.05 0.062
GS 19/24 80 Shore A 4.9 11900 9550 1030 582 0.16 0.39
GS 19/24 92 Shore A 10 11900 9550 1720 1120 0.16 0.39
GS 19/24 98 Shore A 17 11900 9550 2580 2010 0.16 0.39
GS24/28 92 Shore A 35 8850 6950 4296 1480 0.33 1.60
GS24/28 98 Shore A 60 8850 6950 6189 2560 0.33 1.60
GS 28/38 92 Shore A 95 7350 5850 6876 1780 0.56 3.80
GS 28/38 98 Shore A 160 7350 5850 10314 3200 0.56 3.80
GS 38/45 92 Shore A 190 5950 4750 13752 2350 1.10 10.00
GS 38/45 98 Shore A 325 5950 4750 21486 4400 1.10 10.00
GS 42 92 Shore A 265 5000 4000 14490 2430 1.85 22.50
GS 42 98 Shore A 450 5000 4000 48000 5570 1.85 22.50
GS48 92 Shore A 310 4550 3600 18055 2580 2.50 46.00
GS48 98 Shore A 525 4550 3600 55925 5930 2.50 46.00
GS 55 92 Shore A 410 3950 3150 21850 2980 4.10 85.25
GS 55 98 Shore A 685 3950 3150 59500 6686 4.10 85.25