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    12-25mm Stainless Steel Bellows Coupling

    12-25mm stainless steel bellows coupling for sale, which has a rated torque of 33 Nm and an allowable speed of 3900 rpm. This high torque tube coupling offers excellent accuracy, smooth operation and long service life, making it ideal for use in a wide range of industrial and commercial applications.
    SKU: ATO-BC-5572
    30-day Returns
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    Delivery date: 6-12 days

    Purchase the high sensitivity stainless steel bellows coupling online in shaft sizes 12-25mm, outside diameter 55mm and length 72mm. This small size stainless steel bellows coupling is precision engineered to provide superior performance and reliability even in the most demanding applications.


    Model ATO-GRCG-55x72
    Rated Torque 33 Nm
    Allowable Eccentricity 0.2mm
    Allowable Deflection
    Allowable Axial Misalignment +0.7-1.5
    Allowable Speed 3700 rpm
    Static Torsional Stiffness 860 Nm/rad
    Moment of Inertia 3.7x10-5
    Weight 735g

    Dimension (unit: mm)

    Bellows couplings dimension

    d1/d2 ΦD L L1 L2 L3 ΦN F M Tightening Torque
    810-11-12-14-15-18-19-20-22-24-25 55 72 16.5 6 27 51.9 10 M6 13 Nm

    Keyway Machining Dimensions Comparison Table

    Keyway machining standard drawing

    Shaft Size Keyway Standard Processing Size Keyway Size
    d1/d2 b t bxh
    Slot Width Tolerance Grooving Depth Tolerance
    φ6-φ7.9 2 ±0.0125 1 ±0.10 2x2
    φ8-φ10 3 ±0.0150 1.4 3x3
    φ10.1-φ12 4 1.8 4x4
    φ12.1-φ17 5 2.3 5x5
    φ17.1-φ22 6 ±0.0180 2.8 6x6
    φ22.1-φ30 8 3.3 ±0.20 8x8
    φ30.1-φ38 10 ±0.0215 3.3 10x10
    φ38.1-φ44 12 3.8 12x12
    φ44.1-φ50 14 4.3 14x14
    φ50.1-φ58 16 4.4 16x16
    φ58.1-φ65 18 4.4 18x18


    Bellows couplings are commonly used in robotics, medical equipment, semiconductor manufacturing, and aerospace industries. Bellows couplings can transmit torque and rotational motion while compensating for misalignments, which makes them ideal for applications where high accuracy and repeatability are critical.

    Bellows couplings applications

    Tips: How to install a bellows couplings?

    Installing a bellows coupling involves the following steps:

    1. Gather the necessary tools and materials: You'll need the bellows coupling, a torque wrench, a set of Allen wrenches, and any additional hardware required for your specific application.
    2. Prepare the shafts: Clean the shafts that will be connected by the coupling. Make sure they are free from any debris or residue that could interfere with the coupling's ability to grip the shafts.
    3. Position the coupling: Slide the bellows coupling over one of the shafts, ensuring that the coupling's orientation matches the intended application. Align the coupling with the other shaft and ensure that the bellows are not twisted or distorted.
    4. Tighten the set screws: Using the Allen wrenches, tighten the set screws on the coupling. Be sure to follow the manufacturer's recommended torque specifications.
    5. Test the coupling: Rotate the shafts to ensure that the coupling is securely fastened and that there is no excessive play or misalignment. Check for any signs of wear or damage that may have occurred during installation.

    It's important to note that the installation process for a bellows coupling may vary depending on the specific type of coupling and the application. Always consult the manufacturer's instructions and recommendations for proper installation procedures.

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