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Specifications

QWL-series ball-cage constant velocity universal couplings are high-precision power transmission elements engineered for uniform motion transfer. Their standout capability is sustaining synchronous constant-speed rotation between driving and driven shafts under angular misalignment and minor shaft offset, outperforming conventional cross-joint universal couplings by a considerable margin. Torque transfer relies on precision steel balls rolling purely between cage cutouts and raceways.

Covering nominal torque from 180 N·m up to 10,000 N·m and swing diameters spanning 85 mm to 275 mm, this range accommodates maximum angular misalignment of 14°–18°. A symmetrical raceway layout and solid mechanical construction deliver strong shock resistance and suppress speed ripple and vibration during operation. These couplings are extensively deployed in high-accuracy transmission scenarios, including metallurgical mill roller tables, CNC machine spindles, precision conveying systems and construction machinery slewing drives. They constitute an excellent shaft connection choice for heavy-duty systems demanding precise motion control.

Product Parameters

Type Nominal torque Tr/N - m Allowable
maximum
shaft
inclination
angle
βmax (°)		 Shaft hole diameter d (H7) shaft hole
length L		 D L0 min Total length extension / contraction amount Δl0 A D1 D2 D3 D4 Bolt Diameter d1 Moment of
inertia /
kg·m2		 Mass m/kg
L0 min per l00
increment
of Ls		 L0 min per l00
increment
of Ls
Stationary state Operating state Y J Through shaft Welded shaft Through shaft Welded shaft Through shaft Welded shaft Through shaft Welded shaft Through shaft Welded shaft
QWL1 180 16 14 25 62 44 85 284 392 24 48 55 20 50 66 M8 0.0019 0.00216 0.0001 0.00029 3.94 4.68 0.25 0.55
28
30 82 60
32
35
QWL2 355 16 14 32 82 60 100 394 478 32 56 66 30 50 80 M8 0.005l1 0.00535 0.0006 0.00029 7.21 7.92 0.56 0.55
35
38 112 84
40
45
QWL3 800 18 16 45 112 84 130 443 561 40 68 90 31.5 60 106 M10 0.01899 0.01964 0.00008 0.00052 14.69 19.02 0.61 0.68
48
50
55
56
60 142 107
63
65
70
QWL4 1400 18 16 55 112 84 150 537 643 48 80 105 44.5 76 124 M12 0.04438 0.04638 0.00029 0.001l1 25.06 27.42 1.19 0.88
56
60 142 107
63
65
65
70
71
75
QWL5 2240 18 16 63 142 107 175 574 714 54 92 120 50 89 140 M16 0.11238 0.11663 0.00048 0.00183 36.32 40.17 1.54 1.04
65
70
71
75
80 172 132
85
90
QWL6 3150 18 16 71 142 107 200 675 805 54 103 140 57.5 102 159 M12 0.21635 0.2236 0.00084 0.00328 55.11 59.95 2.04 1.04
75
80 172 132
85
85
90
95
100 212 167
110
QWL7 4500 18 16 80 172 132 220 701 840 54 110 160 63 102 180 M12 0.348 0.3555 0.00122 0.00328 72.34 77.54 2.45 1.42
85
90
95
100 212 167
110
120
QWL8 6300 20 18 90 172 132 245 710 910 60 124 180 76 14 197 M16 0.584 0.618 0.00257 0.01l38 96.92 109.97 3.56 2.6
95
100 212 167
110
120
125
130 252 202
140
QWL9 10000 20 18 100 212 167 275 842 1065 70 173 205 81 140 226 M16 1.26225 1.298 0.00331 0.01l38 148.36 162.84 4.04 2.6
110
120
125
130 252 202
140
150
160 302 242

Note:

1. Nominal torque at a rotational speed of n = 100 r/min. Calculated value when the shaft inclination angle is 0°.

2. The short-term overload torque generated during starting and braking (Tmax) is 3 times the normal torque (Tn), and the duration must not exceed 15 seconds. 

QWL-series ball-cage constant velocity universal couplings are high-precision power transmission elements engineered for uniform motion transfer. Their standout capability is sustaining synchronous constant-speed rotation between driving and driven shafts under angular misalignment and minor shaft offset, outperforming conventional cross-joint universal couplings by a considerable margin. Torque transfer relies on precision steel balls rolling purely between cage cutouts and raceways.

Covering nominal torque from 180 N·m up to 10,000 N·m and swing diameters spanning 85 mm to 275 mm, this range accommodates maximum angular misalignment of 14°–18°. A symmetrical raceway layout and solid mechanical construction deliver strong shock resistance and suppress speed ripple and vibration during operation. These couplings are extensively deployed in high-accuracy transmission scenarios, including metallurgical mill roller tables, CNC machine spindles, precision conveying systems and construction machinery slewing drives. They constitute an excellent shaft connection choice for heavy-duty systems demanding precise motion control.

Product Parameters

Type Nominal torque Tr/N - m Allowable
maximum
shaft
inclination
angle
βmax (°)		 Shaft hole diameter d (H7) shaft hole
length L		 D L0 min Total length extension / contraction amount Δl0 A D1 D2 D3 D4 Bolt Diameter d1 Moment of
inertia /
kg·m2		 Mass m/kg
L0 min per l00
increment
of Ls		 L0 min per l00
increment
of Ls
Stationary state Operating state Y J Through shaft Welded shaft Through shaft Welded shaft Through shaft Welded shaft Through shaft Welded shaft Through shaft Welded shaft
QWL1 180 16 14 25 62 44 85 284 392 24 48 55 20 50 66 M8 0.0019 0.00216 0.0001 0.00029 3.94 4.68 0.25 0.55
28
30 82 60
32
35
QWL2 355 16 14 32 82 60 100 394 478 32 56 66 30 50 80 M8 0.005l1 0.00535 0.0006 0.00029 7.21 7.92 0.56 0.55
35
38 112 84
40
45
QWL3 800 18 16 45 112 84 130 443 561 40 68 90 31.5 60 106 M10 0.01899 0.01964 0.00008 0.00052 14.69 19.02 0.61 0.68
48
50
55
56
60 142 107
63
65
70
QWL4 1400 18 16 55 112 84 150 537 643 48 80 105 44.5 76 124 M12 0.04438 0.04638 0.00029 0.001l1 25.06 27.42 1.19 0.88
56
60 142 107
63
65
65
70
71
75
QWL5 2240 18 16 63 142 107 175 574 714 54 92 120 50 89 140 M16 0.11238 0.11663 0.00048 0.00183 36.32 40.17 1.54 1.04
65
70
71
75
80 172 132
85
90
QWL6 3150 18 16 71 142 107 200 675 805 54 103 140 57.5 102 159 M12 0.21635 0.2236 0.00084 0.00328 55.11 59.95 2.04 1.04
75
80 172 132
85
85
90
95
100 212 167
110
QWL7 4500 18 16 80 172 132 220 701 840 54 110 160 63 102 180 M12 0.348 0.3555 0.00122 0.00328 72.34 77.54 2.45 1.42
85
90
95
100 212 167
110
120
QWL8 6300 20 18 90 172 132 245 710 910 60 124 180 76 14 197 M16 0.584 0.618 0.00257 0.01l38 96.92 109.97 3.56 2.6
95
100 212 167
110
120
125
130 252 202
140
QWL9 10000 20 18 100 212 167 275 842 1065 70 173 205 81 140 226 M16 1.26225 1.298 0.00331 0.01l38 148.36 162.84 4.04 2.6
110
120
125
130 252 202
140
150
160 302 242

Note:

1. Nominal torque at a rotational speed of n = 100 r/min. Calculated value when the shaft inclination angle is 0°.

2. The short-term overload torque generated during starting and braking (Tmax) is 3 times the normal torque (Tn), and the duration must not exceed 15 seconds. 

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