29P-7293-HD-A4 2/20 www.huco.com
Beam Couplings
• Multi-Beam
• Single-Beam
• Step-Beam
• Torsionally rigid design
• Zero backlash
• No moving parts
• Single beam simple coupling compatible with industry standard types
• 3-Beam single stage for increased torsional stiffness
• 6-Beam two stage for torsional stiffness and increased radial compliance
• Step Beam for low inertia, electrical isolation, low cost
Beam couplings will readily accommodate any combination of axial motion, angular and
parallel misalignment.
The 3 start helical-cut design provides higher torque capability and reduced wind-up
compared with single beam versions.
Multi-Beam is available in three standard materials: stainless steel, aluminium and acetal,
for shaft diameters from 1mm to 38mm.
30 www.huco.com P-7293-HD-A4 2/20
Multi-Beam
Stainless Steel Multi-Helix Flexible 3 Beam Couplings
3-BEAM COUPLINGS: DIMENSIONS & ORDER CODES
Set Screw Hubs
Materials & Finishes
Couplings: Stainless Steel 303
S31
Fasteners: Stainless Steel
Temperature Range
–40°C to +140°C
Clamp Hubs
L
L 1
Ø B2
Ø B1
L 1
Ø D
•
B1 only
•
B1 & B2
BORE SIZES 3-BEAM COUPLINGS
Coupling
Type &
Size
Set
Screw
Style
Clamp
Type
ØD
mm
L
mm
L1
mm
Bore Diameters
Mass
kgx10-3
Fasteners
Angular
Offset
Deg.
Parallel
Offset mm
Torsional
Stiffness
Nm/rad
Peak
Torque
Nm
COUPLING REF
Min
B1
Min
B2
Max
B1 &
B2
Set
Screw
Cap
Screw
Torque
Nm
Wrench
mm
6 720.06 – 6.4 12.7 3.2 1.0 2.0 3.0 1.93 M2 – 0.08 0.9 3 .07 1.53 0.45
9
720.09 –
9.5 14.2 4.5 2.0 3.0 3.18 5.85
M2.5 - 0.23 1.3
3 0.1 16 0.50
– 721.09 - M1.6 0.15 1.5
13
720.13 –
12.7 19.1 6.0 3.0 4.0 5.0 13.7
M3 - 0.32 1.5
5 .127 54 1.0
– 721.13 - M2 0.30 1.5
16
720.16 –
15.9 20.3 6.5 3.0 4.0 6.35 22.9
M4 - 1.05 2.0
5 .127 81 1.80
– 721.16 - M2.5 0.68 2.0
19
720.19 –
19.1 22.9 6.5 4.0 4.76 8.0 35.9
M4 - 1.05 2.0
5 .127 143 2.70
– 721.19 - M2.5 0.68 2.0
25
720.25 –
25.4 31.8 9.0 5.0 6.0 10 92.2
M5 - 2.10 2.5
5 .127 175 6.0
– 721.25 - M3 1.20 2.5
32
720.32 –
31.8 44.5 12.0 6.0 8.0 14 194
M6 - 3.75 3.0
5 .127 378 10.0
– 721.32 - M4 2.85 3.0
Relieved
32 21
Coupling
Size
ØB1, ØB2 +0.03mm/-0mm (+0.0012/ -0)
1 2 3 (1/8”) 4 (3/16”) 5 6 (1/4”) 8 (3/8”) 10 12 (1/2”) 14
6
• • •
9
• • •
13
• • • • •
16
• • • • • • •
19
• • • • • •
25
• • • • • •
32
• • • • • • • •
Bore ref. 8 11 14 16 18 19 20 22 24 28 31 32 35 36 38
Length of supported bore.
Max. compensation values are mutually exclusive.
1
2
3
Peak torque. Select a size where Peak Torque exceeds the application torque x service factor. (see page 4)
L
L 1
Ø B2
Ø B1
L 1
Ø D