Spiral Beam Coupling BC Series use jack screw fastening. BC series flexible beam spiral coupling made of aluminium.Choose model, we will give you best price.
1:Integrated structure,the overall use of high-strength aluminum alloy.
2:Flexible action to compensate radial,angular and axial misalignment.
3:Seamless shaft and sleeve connection,suitable for reversing.
4:Jack screw.
BC Series
BC-Outside diameter X Total length – d1 bore X d2 bore
Example: BC-38X41-10X10
BC: Beam coupling
38: Outside diameter
41: Total length
10: d1 bore diameter
10: d2 bore diameter
| Model | d1 d2
Bore |
ΦD | L | L1 | L2 | F | M | Wrench Torque
(N.M) |
| BC-10X12 | 3,4,5 | Φ10 | 12 | 0.5 | 1.2 | 2 | 4-M2.5X3 | 0.5 |
| BC-12X18.5 | 3,4,5,6, 6.35 | Φ12 | 18.5 | 0.5 | 1.2 | 2.5 | 4-M3X6 | 0.7 |
| BC-15.5X23 | 4,5,6, 6.35 | Φ15.5 | 23 | 0.5 | 1.4 | 3.6 | 4-M4X5 | 1.7 |
| BC-16X23 | 4,5,6, 6.35 | Φ16 | 23 | 0.5 | 1.4 | 3.6 | 4-M4X5 | 1.7 |
| BC-17.5X23 | 4,5,6, 6.35 | Φ17.5 | 23 | 0.5 | 1.4 | 3.6 | 4-M4X5 | 1.7 |
| BC-19X23 | 3,4,5,6, 6.35 ,8 | Φ19 | 23 | 0.5 | 1.4 | 3.6 | 4-M4X5 | 1.7 |
| BC-20X26 | 4,5,6, 6.35 ,7,8 | Φ20 | 26 | 0.5 | 1.5 | 3.6 | 4-M4X6 | 1.7 |
| BC-25X25 | 5,6, 6.35 ,8,9, 9.525 ,10,11,12 | Φ25 | 25 | 0.55 | 1.7 | 3.6 | 4-M4X6 | 1.7 |
| BC-25X31 | 6, 6.35 ,8,9, 9.525 ,10,11,12 | Φ25 | 31 | 0.55 | 1.8 | 4.3 | 4-M4X6 | 1.7 |
| BC-28.5X38 | 8,9, 9.525 ,10,11,12,14 | Φ28.5 | 38 | 0.8 | 2.1 | 4.5 | 4-M4X8 | 1.7 |
| BC-32X32 | 8,9, 9.525 ,10,11,12,14,15 | Φ32 | 32 | 0.8 | 2.3 | 6 | 4-M5X8 | 4 |
| BC-38.1X38.1 | 8,9, 9.525 ,10,11,12,14,15 | Φ38.1 | 38.1 | 0.8 | 2.3 | 5.3 | 4-M5X8 | 4 |
| BC-38X41 | 8,9, 9.525 ,10,11,12,14,15 | Φ38 | 41 | 0.8 | 2.3 | 6 | 4-M5X8 | 4 |
| BC-40X56 | 8,9, 9.525 ,10,11,12,14,15,16,19 | Φ40 | 56 | 0.8 | 2.3 | 7 | 4-M6X10 | 7 |
| BC-50X50 | 12, 12.7 ,14,15,16,19,20,22,24 | Φ50 | 50 | 0.8 | 2.9 | 7 | 4-M8X12 | 8.4 |
| BC-50X71 | 12, 12.7 ,14,15,16,19,20,22,24 | Φ50 | 71 | 0.8 | 3.3 | 8.5 | 4-M8X12 | 8.4 |
| BC-63X90 | 14,15,16,18,19,20,22,24,25,30 | Φ63 | 90 | 0.8 | 4 | 11.3 | 4-M8X14 | 8.4 |
| Model | Rated torque
(N.M) |
Maximum torque
(N.M) |
Allow Radial direction
(mm) |
Allow angle
(°) |
Allow Axis
(mm) |
Maximum speed
(rpm) |
Static torsional stiffness
(N.M/rad) |
Moment of inertia
(kg.M2) |
Flexible colloidal material | Surface Treatment | Weight
(g) |
| BC-10X12 | 0.5 | 1 | 0.1 | 2 | ±0.2 | 35000 | 38 | 7.5×10–8 | High strength aluminum alloy | Oxidation treatment | 2.3 |
| BC-12X18.5 | 0.8 | 1.6 | 0.1 | 2 | ±0.2 | 32000 | 45 | 8.3×10–8 | 3.7 | ||
| BC-15.5X23 | 0.9 | 1.8 | 0.1 | 2 | ±0.2 | 23000 | 76 | 2.9×10-7 | 3.7 | ||
| BC-16X23 | 1 | 2 | 0.1 | 2 | ±0.2 | 24000 | 80 | 3.3×10-7 | 7.8 | ||
| BC-17.5X23 | 1.1 | 2.2 | 0.1 | 2 | ±0.2 | 23000 | 100 | 5.6×10-7 | 9.6 | ||
| BC-19X23 | 1.2 | 2.4 | 0.1 | 2 | ±0.2 | 20000 | 150 | 8.7×10-7 | 12 | ||
| BC-20X26 | 1.5 | 3 | 0.15 | 2 | ±0.2 | 19000 | 245 | 9.0×10-7 | 14 | ||
| BC-25X25 | 2 | 4 | 0.15 | 2 | ±0.2 | 15000 | 350 | 2.2×10–6 | 23 | ||
| BC-25X31 | 2 | 4 | 0.15 | 2 | ±0.2 | 15000 | 330 | 2.6×10–6 | 27 | ||
| BC-28.5X38 | 3 | 6 | 0.15 | 2 | ±0.2 | 13000 | 500 | 4.3×10–6 | 46 | ||
| BC-32X32 | 4 | 8 | 0.15 | 2 | ±0.2 | 12000 | 870 | 8.0×10–6 | 50 | ||
| BC-38.1X38.1 | 6.5 | 13 | 0.2 | 2 | ±0.2 | 11000 | 880 | 2.9×10–6 | 98 | ||
| BC-38X41 | 6.5 | 13 | 0.2 | 2 | ±0.2 | 10000 | 900 | 3.0×10–5 | 107 | ||
| BC-40X56 | 8 | 16 | 0.2 | 2 | ±0.2 | 9600 | 950 | 3.2×10–5 | 135 | ||
| BC-50X50 | 20 | 40 | 0.2 | 2 | ±0.2 | 8000 | 1350 | 6.8×10–5 | 220 | ||
| BC-50X71 | 25 | 50 | 0.2 | 2 | ±0.2 | 8000 | 1450 | 8.8×10–5 | 322 | ||
| BC-63X90 | 35 | 70 | 0.2 | 2 | ±0.2 | 6000 | 2200 | 8.8×10–5 | 650 |
