Gear couplings are torsionally rigid and are supplied to two designs – completely flexible and flexible/rigid. A completely flexible coupling comprises two hubs with an external gear and two outer sleeves with an internal gear.
Product Description
It's a universal coupling for all sorts of applications and accommodates all possible misalignments (angular, offset and combined) as well as large axial moments. Machines, bearings, seals, and shafts are therefore not subjected to the additional forces, sometimes of considerable magnitude, which arise from unavoidable misalignment usually associated with rigid shaft couplings.
BVCHAINS RGD Gear coupling; torque capacity exceeds the competition, and it allows smaller coupling size of increased service factor.
BVCHAINS Gear couplings can accommodate large shaft diameters for given particular size of coupling compared to the competition, in most instances. That mean you can buy a smaller less expensive coupling and still get the proper rating for the equipment.
Complete half coupling assemblies are interchangeable with any other half gear coupling with exposed bolt flange manufactured to AGMA standard. replacement half couplings provide additional hub strength and lower gear mesh loads.
BVCHAINS Special Grease properties are designed/developed to resist separation of Base oil & thickner due to centrifugal forces encountered in Gear coupling. This benefits for the application -
- Significantly extended relubrication intervals
- Reduced maintenance cost
- Superior lubrication
- Increased coupling life
The location & size lubrication holes in the sleeve ensures that adequate grease is available at the gear mesh, where it is needed must fully moulded seals positively lubricant and seal interior against foreign matter
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SERVICE FACTOR - S. F
Torque Variation |
Electric motor gas or steam turbine |
Steam engine or Water turbine |
Gas or oil Recip. Engine |
Consultant Torque |
1.0 |
1.25 |
3.0 |
Slight Fluctuations |
1.5 fans |
2.0 |
3.0 |
Substantial Fluctuations |
2.0 |
2.5 |
4.0 |
SELECTION :
- Select appropriate service factor S.F.
- Calculate coupling Torque T (kNm)
- Select coupling with the same or higher Torque.
- Check hub bore capacity.
- Check allowable speed.
T= 9.55 x P x S.F.
N
Where P = Drive rated power (kW), N = Speed (rev./min)
![](images/gear_couplings-type-gd.jpg)
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TYPE - GD
Size | Coupling Rating | Maximum Speed rpm | Bore Dia OD mm | Dimensions mm | Solid Hub | |||||||||
kW at 100 rpm | Rated Torque Nm | Min. Bore | Max. Bore | ØA | TL | L | ØB | ØF | M | Gap | Mass kg | M.I. (WR²) kg-m² | ||
GD-10 | 14 | 1337 | 8000 | 14 | 52 | 116 | 89 | 43 | 69 | 84 | 51 | 3 | 4.4 | 0.0052 |
GD-15 | 30 | 2865 | 6500 | 22 | 65 | 152 | 103 | 50 | 86 | 105 | 61 | 3 | 9 | 0.0192 |
GD-20 | 53 | 5061 | 5600 | 27 | 80 | 178 | 127 | 62 | 105 | 127 | 76 | 3 | 15 | 0.041 |
GD-25 | 105 | 10027 | 5000 | 32 | 98 | 213 | 159 | 77 | 131 | 155 | 92 | 5 | 27 | 0.105 |
GD-30 | 168 | 16043 | 4400 | 42 | 115 | 240 | 187 | 91 | 152 | 181 | 106 | 5 | 40 | 0.195 |
GD-35 | 231 | 22059 | 3900 | 47 | 135 | 279 | 220 | 107 | 178 | 211 | 130 | 6 | 65 | 0.454 |
GD-40 | 336 | 32086 | 3600 | 47 | 160 | 318 | 248 | 121 | 210 | 250 | 145 | 6 | 96 | 0.86 |
GD-45 | 472 | 45073 | 3200 | 52 | 180 | 346 | 278 | 135 | 235 | 274 | 165 | 8 | 131 | 1.39 |
GD-50 | 650 | 62070 | 2900 | 72 | 195 | 389 | 314 | 153 | 254 | 306 | 183 | 8 | 186 | 2.53 |
GD-55 | 880 | 84034 | 2650 | 72 | 215 | 425 | 344 | 168 | 279 | 334 | 203 | 8 | 247 | 3.83 |
GD-60 | 1205 | 115069 | 2450 | 77 | 235 | 457 | 384 | 188 | 305 | 366 | 228 | 8 | 299 | 5.21 |
GD-70 | 1823 | 174084 | 2150 | 92 | 280 | 527 | 451 | 221 | 356 | 425 | 266 | 9 | 473 | 11 |
GD-80 | 2639 | 252006 | 1750 | 95 | 285 | 590 | 508 | 249 | 385 | 485 | 300 | 10 | 682 | 20.72 |
GD-90 | 3037 | 290012 | 1550 | 100 | 300 | 660 | 565 | 276 | 420 | 535 | 325 | 13 | 898 | 34.95 |
GD-100 | 4100 | 391521 | 1450 | 120 | 330 | 711 | 623 | 305 | 470 | 595 | 355 | 13 | 1242 | 55.95 |
![](images/gear_couplings-type-bgs.jpg)
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TYPE BGS
Size | Coupling Rating | Max Speed rpm |
Min. Bore Dia mm | Max. Bore Dia mm |
Dimensions mm | Solid Hub | ||||||||||||
kW at 100 rpm |
Rated Torque kNm |
Flex Hub |
Rigid Hub |
Flex Hub |
Rigid Hub |
ØA | TL1 | L | ØB1 | ØF | ØB2 | L2 | M | Gap | Mass kg |
M.I. (WR²) Kg-m² | ||
BGS-10 | 14 | 1337 | 8000 | 14 | 18 | 52 | 60 | 116 | 87 | 43 | 69 | 84 | 84 | 40 | 51 | 4 | 4.5 | 0.0055 |
BGS-15 | 30 | 2865 | 6500 | 22 | 26 | 65 | 80 | 152 | 101 | 50 | 86 | 105 | 107 | 47 | 61 | 4 | 9.5 | 0.0204 |
BGS-20 | 53 | 5061 | 5600 | 27 | 30 | 80 | 90 | 178 | 125 | 62 | 105 | 127 | 130 | 59 | 76 | 4 | 15.5 | 0.0436 |
BGS-25 | 105 | 10027 | 5000 | 32 | 37 | 98 | 110 | 213 | 156 | 77 | 131 | 155 | 157 | 74 | 92 | 5 | 27.5 | 0.111 |
BGS-30 | 168 | 16043 | 4400 | 42 | 44 | 115 | 130 | 240 | 184 | 91 | 152 | 181 | 182 | 88 | 106 | 5 | 41.5 | 0.210 |
BGS-35 | 231 | 22059 | 3900 | 47 | 52 | 135 | 150 | 279 | 215 | 107 | 178 | 211 | 212 | 102 | 130 | 6 | 67 | 0.477 |
BGS-40 | 336 | 32086 | 3600 | 47 | 52 | 160 | 180 | 318 | 245 | 121 | 210 | 246 | 250 | 116 | 145 | 8 | 100 | 0.92 |
BGS-45 | 472 | 45073 | 3200 | 52 | 57 | 180 | 200 | 346 | 274 | 135 | 235 | 274 | 276 | 131 | 165 | 8 | 135 | 1.468 |
BGS-50 | 650 | 62070 | 2900 | 72 | 77 | 195 | 220 | 389 | 310 | 153 | 254 | 306 | 309 | 148 | 183 | 9 | 195 | 2.73 |
BGS-55 | 880 | 84034 | 2650 | 72 | 77 | 215 | 240 | 425 | 350 | 168 | 279 | 334 | 334 | 173 | 203 | 9 | 261 | 4.20 |
BGS-60 | 1205 | 115069 | 2450 | 77 | 82 | 235 | 260 | 457 | 384 | 188 | 305 | 366 | 366 | 186 | 228 | 10 | 316 | 5.70 |
BGS-70 | 1823 | 174084 | 2150 | 92 | 102 | 280 | 300 | 527 | 452 | 221 | 356 | 425 | 425 | 218 | 266 | 13 | 500 | 12.05 |
BGS-80 | 2639 | 252006 | 1750 | 95 | 105 | 285 | 335 | 590 | 511 | 249 | 385 | 485 | 470 | 249 | 300 | 13 | 715 | 21.77 |
BGS-90 | 3037 | 290012 | 1550 | 100 | - | 300 | 370 | 660 | 567 | 276 | 420 | 535 | 518 | 276 | 325 | 15 | 969 | 36.60 |
BGS-100 | 4100 | 391521 | 1450 | 120 | - | 330 | 405 | 711 | 626 | 305 | 470 | 595 | 572 | 305 | 355 | 16 | 1259 | 56.27 |
![](images/gear_couplings-type-bvg.jpg)
![](images/gear_couplings-type-bvg-img.jpg)
Standard full flexible gear coupling TYPE BVG accommodates angular & parallel misalignments or a combination of both as well as axial misalignment (end float). Ideal for all horizontal, close coupled applications including fans, overhead cranes, conveyors, steel & paper mill equipments. One or both the hubs can be easily reversed for more than normal shafts separation applications.
TYPE BVG
Size | kW at 100 rpm |
Rated Torque Nm | Max. rpm |
Bore ØD | ØA | ØB | ØF | G | L | M | TL | # | ||
wt. kg |
M.I.(WR²) kg-m² |
|||||||||||||
PB | Max. | |||||||||||||
BVG -100 | 6 | 559 | 7600 | 13 | 35 | 120 | 50 | 75 | 3 | 45 | 54 | 93 | 4.1 | 0.006 |
BVG -101 | 12 | 1127 | 6730 | 14 | 50 | 170 | 65 | 110 | 5 | 55 | 67 | 115 | 10.6 | 0.029 |
BVG -102 | 29 | 2804 | 6150 | 20 | 65 | 185 | 85 | 125 | 5 | 70 | 83 | 145 | 15.4 | 0.046 |
BVG -103 | 53 | 5047 | 5200 | 30 | 80 | 220 | 105 | 150 | 5 | 85 | 103 | 175 | 26.0 | 0.110 |
BVG -104 | 100 | 9557 | 4580 | 40 | 100 | 250 | 130 | 175 | 5 | 105 | 124 | 215 | 40.0 | 0.213 |
BVG -105 | 152.94 | 14605 | 3950 | 46 | 115 | 290 | 155 | 200 | 10 | 110 | 136 | 230 | 60.0 | 0.445 |
BVG -106 | 235 | 22444 | 3550 | 50 | 125 | 320 | 175 | 230 | 10 | 125 | 152 | 260 | 84.0 | 0.745 |
BVG -107 | 412 | 39303 | 3270 | 60 | 145 | 350 | 205 | 260 | 10 | 140 | 174 | 290 | 113.4 | 1.21 |
BVG -108 | 529 | 50472 | 3015 | 70 | 165 | 380 | 230 | 290 | 10 | 155 | 187 | 320 | 158.0 | 2.04 |
BVG -109 | 658 | 62821 | 2650 | 80 | 190 | 430 | 250 | 330 | 10 | 165 | 196 | 340 | 210.0 | 3.46 |
BVG -110 | 963 | 91923 | 2330 | 100 | 230 | 490 | 310 | 390 | 10 | 180 | 216 | 370 | 290.0 | 5.55 |
BVG -111 | 1289 | 123065 | 2100 | 110 | 260 | 545 | 350 | 445 | 10 | 200 | 245 | 410 | 545.0 | 15.25 |
BVG -112 | 1723 | 164516 | 1940 | 150 | 300 | 590 | 400 | 490 | 10 | 240 | 289 | 490 | 716.0 | 24.30 |
BVG -113 | 2908 | 277694 | 1600 | 160 | 330 | 680 | 440 | 555 | 15 | 260 | 312 | 535 | 984.0 | 43.21 |
BVG -114 | 4019 | 383786 | 1500 | 200 | 370 | 730 | 500 | 610 | 15 | 280 | 341 | 575 | 1219.0 | 64.84 |
BVG -115 | 4812 | 459515 | 1400 | 230 | 410 | 780 | 540 | 660 | 15 | 320 | 385 | 655 | 1566.0 | 97.30 |
BVG -116 | 7028 | 671165 | 1200 | 260 | 455 | 900 | 625 | 755 | 20 | 350 | 423 | 720 | 2246.0 | 183.66 |
BVG -117 | 9997 | 954665 | 1100 | 300 | 520 | 1000 | 720 | 855 | 20 | 400 | 489 | 820 | 3260.0 | 338.05 |
BVG -118 | 13236 | 1263938 | 1000 | 320 | 620 | 1100 | 810 | 950 | 20 | 450 | 533 | 920 | 4680.0 | 600.41 |
BVG -119 | 17454 | 1666744 | 900 | 300 | 710 | 1250 | 910 | 1050 | 30 | 485 | 559 | 1000 | 6283.0 | 955.96 |