beam coupling

Most couplings can be divided into one of two types, rigid and flexible. Rigid couplings are used for applications that require proper alignment, while flexible couplings, such as beam couplings, are suitable for applications where there is some acceptable misalignment.

Beam couplings, sometimes called screw couplings, are made from a piece of material that is made flexible by removing material in a helical pattern along its length. Like all couplings, the purpose of beam couplings is to transfer torque between two shafts, but unlike rigid couplings, beam couplings can accommodate angular misalignment, parallel misalignment of one shaft relative to the other even axial movement. Beam couplings also differ from other coupling types in that their one-piece construction prevents the backlash typically encountered with couplings made of multiple parts.

Precision Aluminum alloy set helical beam coupling

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A beam coupling, also known as helical coupling, is a flexible coupling for transmitting torque between two shafts while allowing for angular misalignment, parallel offset, and even axial motion, of one shaft relative to the other. This design utilizes a single piece of material and becomes flexible by removal of material along a spiral path resulting in a curved flexible beam of helical shape. Since it is made from a single piece of material, the Beam Style coupling does not exhibit the backlash found in some multi-piece couplings. Another advantage of being an all machined coupling is the possibility to incorporate features into the final product while still keeping the single piece integrity.

Features of TS4 beam coupling:

1. One-piece metallic beam coupling

2. Zero backlash

3. Absorb parallel, angular and axial misalignments

4. Identical clockwise and anticlockwise rotational characteristics

5. Material:Aluminum alloy and stainless steel

6. Set screw type

Precision Aluminum alloy set helical beam flexible shaft coupling

Model

Φ d1Φd2
Bore diameter

ΦD

L

L1

M

Wrench Torque
N·m

TS4-M15

3 4 5

15.5

21

2.6

M3

0.7

TS4-15

3 4 5

15.5

23

3.1

M3

0.7

TS4-17

4 5 6

17.5

23

3.1

M3

0.7

TS4-19

5 6 6.35 8

19.5

24.5

3.5

M4

1.5

TS4-25

7 10

25.4

25.4

3.55

M4

1.7

Model

Rated Torque
(N·m)

Max.Torque
(N·m)

Max.Rotational Frequency
(rpm)

Moment of inertia
kg·m2

Static Torsioral Stiffness
N m/rad

Parallel misalignment
mm

Angular misalignment

Axial misalignment
mm

Mass
g

TS4-15

0.2

0.4

13000

3.2×10-3

36

0.1

1.5

±0.15

10

TS4-17

0.3

0.6

12000

6.1×10-3

65

0.1

1.5

±0.25

12

TS4-19

0.4

0.8

10000

8.5×10-3

100

0.1

1.5

±0.25

14

TS4-25

1.2

2.4

10000

2.6×10-3

170

0.1

1.5

±0.15

26

TS4-28

1.6

3.2

8000

4.9×10-3

260

0.1

1.5

±0.15

42

TS4-38

4.2

8.4

8000

1.9×10-3

330

0.15

1.5

±0.15

76

TS4-50

9.0

18.0

6000

8.9×10-3

560

0.15

1.5

±0.15

128

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Beam Coupling

Beam couplings connect rotating shafts and accommodate axial movement and misalignment of parallel or angular shafts. They feature a low-maintenance, one-piece design that provides greater misalignment capabilities. Beam couplings are often used in low torque applications that do not require high operating speeds, although some beam couplings can handle high torque applications.

There are several types of beam couplings, including flexible, slit, and rigid. Each has unique features and capabilities to address issues such as misalignment and backlash in motion control applications. Common uses for beam couplings include encoders, pumps, and a range of other light machinery applications. When choosing a beam coupling, it is important to pay attention to size, torque, and speed ratings to ensure it will meet your application needs.

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