Drum gear couplings
Drum gear couplings - Image 2
Drum gear couplings - Image 3
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Drum gear couplings - Image 8
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Drum gear couplings - Image 11
Drum gear couplings - Image 12
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Drum gear couplings

Parameters for Drum Gear Couplings:

  • Maximum Allowable Torque: 0.63 kN·m to 5600 kN·m
  • Maximum Rotational Speed: 4000 rpm to 950 rpm
  • Coupling Material: ZG430-640, 45 steel
  • Coupling Models: GⅡCL, GⅡCLZ
  • Custom Options: Non-standard customization is available; you can provide drawings, and we will manufacture according to the specified dimensions.
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Overview and Functionality

Drum gear couplings are a type of flexible coupling with radial, axial, and angular misalignment compensation capabilities. To achieve this flexibility, the teeth of the outer gear ring are designed with a crowned tooth shape, and the tooth top is shaped as a spherical surface centered on the axis, leaving significant gaps at the top and sides of the teeth. These features allow the coupling to compensate for relative displacement between the two shafts.

Design Features and Connection Method

Additionally, the design of Drum gear couplings enables a variable instantaneous transmission ratio that fluctuates periodically. This is achieved by placing toothed elements made of non-metallic materials into the flange holes of the two coupling halves, connecting them effectively. The coupling can accommodate substantial axial displacement, although its radial and angular misalignment compensation capacities are relatively limited. With a simple structure, ease of manufacturing, and convenient maintenance, Drum gear couplings are widely used in industries such as metallurgy, mining, and lifting and transport equipment.

Advantages and Applications

The advantages of Drum gear couplings include a compact structure, small rotational radius, high load capacity, high transmission efficiency, low noise, and long maintenance intervals. They are suitable for a broad range of operating temperatures, from -20°C to +80°C. The simplified mold forming of the housing reduces manufacturing costs and offers good self-lubricating properties, making Drum gear couplings an ideal approximation to universal flexible couplings. Furthermore, the assembly and maintenance of the couplings are especially straightforward, making them widely used in equipment like hydraulic pumps, lubrication pumps, pneumatic pumps, compressors, and textile machinery.

Specifications and Performance

couplings are available in a diverse range, with 28 specifications and 20 types, featuring bore diameters up to 1200 mm and torque capacities reaching 8,191,813 Nm, highlighting their exceptional load-bearing capacity.

Design Considerations for Enhanced Service Life

Moreover, the design of couplings incorporates critical considerations for enhancing service life. For instance, performance is optimized through refined shaping and flexible elements between the teeth. The tooth width factor affects both the root bending strength and the contact strength of the tooth surface. A larger tooth width requires a greater crown radius and more side clearance. Therefore, these factors must be balanced during design to ensure the performance and durability of the coupling.

GⅡCL  Drum gear couplings basic parameters and main dimensions

Type Nominal torque
(KN.m)		 Permissible speed
(r/min)		 Shaft hole diameter
(mm)		 Shaft hole length:L D D1 D2 C H A B e Moment of Inertia
(kg/m²)		 Grease quantity
（ml）		 weight
（kg）
d1,d2 Y1 Y2
GⅡCL1 0.63 6500 16,18,19 42 / 103 71 50 8 2 36 76 38 0.0016 51 3.4
20,22,24 52 38 0.003 3.2
25,28 62 44 0.0031 3.3
30,32,35 82 60 0.0032 3.5
GⅡCL2 1 6000 20,22,24 52 / 115 83 60 8 2 42 88 42 0.0024 70 4.6
25,28 62 44 0.0023 4.1
30,32,35,38 82 60 0.0024 4.5
40,42,45 112 84 0.0025 4.6
GⅡCL3 1.6 5600 22,24 52 / 127 95 75 8 2 44 90 42 0.0044 68 6.1
25,28 62 44 0.0042 5.5
30,32,35,38 82 60 0.0045 6.3
40,42,45,48,50,55,56 112 84 0.0101 6.9
GⅡCL4 2.8 5100 38 82 60 49 116 90 8 2 49 98 42 0.0205 87 9.5
40.42.45.48,50,55,56 112 84 0.0228 11.3
60,63,65 142 107 0.0234 10.5
GⅡCL5 4.5 4600 40,42,45,48,50,55,56 112 84 167 134 105 10 2.5 55 108 42 0.0418 125 15.9
60,63,65,70,71,75 142 107 0.0444 16
GⅡCL6 6.3 4300 45,48,50,55,56 112 84 87 153 125 10 2.5 56 10 42 0.0706 148 21.2
60,63,65,70,71,75 142 107 0.0777 23
80,85,90 172 132 0.0809 22.1
GⅡCL7 8 4000 50,55,56 112 84 204 170 140 10 2.5 60 118 42 0.103 175 27.6
60,63,65,70,71,75 142 107 0.115 33
80,85,90,95 172 132 0.1298 39.2
100,(105) 212 167 0.151 47.5
GⅡCL8 11.2 3700 55,56 112 84 230 186 155 12 3 67 142 47 0.167 268 35.5
60.63,65,70,71,75 142 107 0.188 42.3
80,85,90,96 172 132 0.21 49.7
100,110. (115) 212 167 0.241 60.2
GⅡCL9 18 3350 60,63,65,70,71,75 142 107 256 212 180 12 3 69 46 47 0.316 310 55.6
80,85,90,95 172 132 0.356 65.6
100.110,120,125. 212 167 0.413 79.6
130,(135) 252 202 0.47 95.8
GⅡCL10 25 3000 65,70,71,75 142 107 287 239 200 14 3.5 78 164 47 0.511 472 72
80,85,90,95 172 132 0.573 84.4
100.110.120.125 212 167 0.659 101
130,140,150 252 202 0.745 119
GⅡCL11 35.5 2700 70,71,75 142 107 325 276 235 14 3.5 81 170 47 1.454 550 97
80,85,90,95 172 132 1.096 114
100,110,120,125 212 167 1.235 138
130,140,150 252 202 1.34 161
160,170,(175) 302 242 1.588 189
GⅡCL12 56 2450 75 142 107 362 313 270 16 4 89 190 49 1.623 695 128
80,85,90,95 172 32 1.828 150
100,110,120,125 212 167 2.113 205
130,140,150 252 202 2.4 213
160,170,180 302 242 2.728 248
190,200 352 282 3.055 285
GⅡCL13 80 2200 150 252 202 412 350 300 18 4.5 98 208 49 3.951 1019 222
160,170,180. (185) 302 242 4.363 246
190,200,220,(225) 352 282 4.541 242
GⅡCL14 125 2000 170,180. (185) 302 242 462 420 335 22 5.5 172 296 63 8.025 2900 421
190,200,220 352 282 8.8 476
240,250 410 330 9.275 544
GⅡCL15 180 1800 190,200,220 352 282 512 470 380 22 5.5 182 316 63 14.3 3700 608
240,250,260 410 330 15.85 696
280,(285) 470 380 17.45 786
GⅡCL16 250 1600 220 352 282 580 522 430 28 7 209 354 67 23.925 4500 799
240,250,260 410 330 26.45 913
280,300,320 470 380 29.1 1027
GⅡCL17 355 1400 250,260 410 330 644 582 490 28 7 198 364 67 43.095 4900 1176
280,(295),300,320 470 380 47.525 1322
340.360. (365) 550 450 53.725 1352
GⅡCL18 500 1210 280,(295),300.320 470 380 726 658 540 28 8 222 430 75 78.525 7000 1698
340,360,380 550 450 87.75 1948
400 650 540 99.5 2278
GⅡCL19 710 1050 340,320 470 380 818 748 630 32 8 232 440 75 36.75 8900 2249
300,(350),360,380,(390) 550 450 153.75 2591
400,420,440,450,460,(470) 650 540 75.5 3026
GⅡCL20 1000 910 360,380. (390) 550 450 928 838 720 32 10.5 247 470 75 261.75 11000 3384
400,420,440,450.460.480,500 650 540 299 3984
530,(540) 800 680 360.75 4430
GⅡCL21 1400 800 400,420,440,450.460.480,500 650 540 1022 928 810 40 11.5 255 490 75 461.6 13000 3912
530.560,600 800 680 449.4 3754
GⅡCL22 1800 700 450.460.480,500 650 540 1134 1036 915 40 13 265 510 75 734.3 16000 4970
630,560,600,630 800 680 837 5408
670,(680) / 780 785.4 4478
GⅡCL23 2500 610 530.560,600.630 800 680 1282 1178 1030 50 14.5 299 580 80 1517 28000 10013
670,(700)710,750,(770) / 780 1725 11553
GⅡCL24 3550 500 560,600,630 800 680 1428 1322 1175 50 16.5 317 610 80 2486 33000 12915
670,(700),710.750 / 780 2838.5 15015
800,850 / 880 3131.75 16615
GⅡCL25 5600 420 670,(700),710.750 / 780 1664 1538 1390 50 19 325 620 80 5082 43000 15760
800,850 / 880 5344 15515
900,950 / 980 5484 15054
1000,(1040) / 1100 5615 14513

GⅡCLZ  Drum gear couplings basic parameters and main dimensions

Type Nominal torque
(KN.m)		 Permissible speed
(r/min)		 Shaft hole diameter
(mm)		 Shaft hole length:L D D2 D1 D3 C H A B e Moment of Inertia
(kg/m²)		 Grease quantity
（ml）		 weight
（kg）
d1,d2 Y J
GⅡCLZ1 0.63 6500 16,18,19 42 / 103 71 71 50 8 2 18 38 38 0.004 31 3.5
20,22,24 52 38 0.0375 3.3
25,28 62 44 0.004 3.5
30,32,35,38* 82 60 0.005 4.1
40*,42*,45*,48*,50* 112 84 0.007 5.7
GⅡCLZ2 1 6000 20.22,24 52 / 115 83 83 60 8 2 2 44 42 0.00675 42 5.3
25.28 62 44 0.00625 4.8
30,32,35,38 82 60 0.007 5.7
40,42,45,48*,50*,55*,56* 112 84 0.008 7.2
60* 142 107 0.01 9.2
GⅡCLZ3 1.6 5600 22,24 52 / 127 95 95 75 8 2 22 45 42 0.009 42 3.8
25,28 62 44 0.011 7.8
30,32,35,38 82 60 0.011 7.6
40,42,45,48,50,55,56 112 84 0.01325 9.8
60*,63*,65*,70 142 107 0.01675 12.5
GⅡCLZ4 2.8 5100 38 82 60 149 116 116 90 8 2 24.5 49 42 0.02125 53 10.5
40,42,45,48,50,55,56 112 84 0.0255 13.5
60,63,65,70*,75* 142 107 0.039 16.5
80* 172 132 0.04875 19.4
GⅡCLZ5 4.5 4600 40,42,45,48,50,55,56 112 84 169 134 134 105 10 2.5 27.5 54 42 0.044 77 18.1
60,63,65,70,71,75 142 107 0.05175 23.1
80°,85*,90* 172 132 0.0625 28.5
GⅡCLZ6 6.3 4300 45,48,50,55,56 112 84 187 153 153 125 10 2.5 28 55 42 0.075 91 23.9
60,63,65,70,71,75 142 107 0.089 29.3
80,85,90,95* 172 132 0.10425 35.4
100*,(105)* 212 167 0.1065 36.2
GⅡCLZ7 8 4000 50,55,56 112 84 204 170 170 140 10 2.5 30 59 42 0.1145 108 29.6
60,63,65,70,71,75 142 107 0.1335 36.3
80,85,90,95 172 132 0.157 43.8
100,(105),110*,(105*) 212 167 0.1898 54.3
GⅡCLZ8 11.2 3700 55,56 112 84 230 186 186 155 12 3 33.5 71 47 0.184 161 37.8
60,63,65,70,71,75 142 107 0.215 46.1
80,85,90,95 172 132 0.249 54.9
100,110,(115),120*,125* 212 167 0.297 67.4
GⅡCLZ9 18 3350 60,63,65,70,71,75 142 107 256 212 212 180 12 3 34.5 73 47 0.358 184 60
80,85,90,95 172 132 0.415 71.8
100,110,120,125 212 167 0.499 88
130,(135),140*,150* 252 202 0.575 104.4
GⅡCLZ10 25 3000 55,70,71,75 142 107 287 239 239 200 14 3.5 39 82 47 0.58 276 76.1
80,85,90,95 172 132 0.6728 91.1
100,110,120,125 212 167 0.8025 111.5
130,140,150 252 202 0.935 133.5
GⅡCLZ11 35.5 2700 110,120,125 212 167 325 276 250 235 14 3.5 40.5 85 47 1.223 322 137
130,140,150 252 202 1.41 162.4
160,170,(175) 302 242 1.625 193
GⅡCLZ12 56 2450 130,140,150 252 202 360 313 286 270 16 4 44.5 95 49 2.39 404 212.8
160,170,180 302 242 2.763 268
190,200 352 285 3.093 290
GⅡCLZ13 80 2200 150 252 202 412 350 322 300 18 4.5 49 104 49 3.93 585 272.3
160,170,180,(185) 302 242 4.535 320
190,200,220,(225) 352 282 6.34 370
GⅡCLZ14 125 2000 170,180,(185) 302 242 462 420 335 / 22 5.5 86 148 63 6.9 1600 389
190,200,220 352 282 7.675 438
240,250 410 330 8.6 509
GⅡCLZ15 180 1800 190,200,220 352 282 512 465 380 / 22 5.5 91 158 63 2.425 2100 566
240,250,260 410 330 13.975 650
280,(285) 470 380 15.575 740
GⅡCLZ16 250 1600 220 352 282 580 522 430 / 28 7 104.5 177 67 21.2 2500 751
240,250,260 410 330 23.125 857
280,300,320 470 380 26.35 974
GⅡCLZ17 355 1400 250,260 410 330 644 582 490 / 28 7 99 182 67 38.825 2700 1110
280,(290),300,320 470 380 43.25 1255
340,360,(365) 550 450 49.5 1465
GⅡCLZ18 500 1210 280,(295),300,320 470 380 726 658 540 / 28 8 111 215 75 69.5 3900 1580
340,360,380 550 450 78.75 1830
400 560 540 90.5 2160
GⅡCLZ19 710 1050 300,320 470 380 818 748 630 / 32 9 116 220 75 122.5 5000 2115
340,(350),360,380,(390) 550 450 139.5 2457
400,420,440,450,460,(470) 650 540 161.25 2892
GⅡCLZ20 1000 910 360,380,(390) 550 450 928 838 720 / 32 10.5 123.5 235 75 240 6200 3223
400,420,440,450,460,480,(500) 650 540 277.25 3793
530,(540) 800 680 335 4680
GⅡCLZ21 1400 800 400.420.440.450.460.480.500 650 540 1022 928 810 / 40 11.5 127.5 245 75 435 7000 4780
530,560,600 800 680 527.75 5905
GⅡCLZ22 1800 700 450,460,480,500 650 540 1134 1036 915 / 40 13 131.1 255 75 701.25 8700 6069
530.560.600.630 800 680 852.25 7504
670. (680) 900 780
GⅡCLZ23 2500 610 530,560,600,630 800 680 1282 1178 1030 / 50 14.5 149.5 290 80 415.75 15000 9633
670,(700),710,750,(770) 900 780 638.75 11133
GⅡCLZ24 3550 500 560,600,630 800 680 1428 1322 1175 / 50 16.5 158.5 305 80 2330.5 18000 12460
670,710,750 900 780 2682.75 14465
800,850 1000 880 2976.25 16110
GⅡCLZ25 5600 420 670, (700),710,750 900 780 1644 1538 1390 / 50 19 162.5 310 80 5174.25 23000 19837
800,850 1000 880 5836.5 22381
900,950 / 980 6413 24765
1000,(1040) / 1100 7198.25 27797

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