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    Two Diaphragms Coupling, 4mm to 8mm

    5 out of 5 based on 1 reviews | Write a review
    Shaft coupling has 2 diaphragms, length 27mm, width 19mm, 4mm to 8mm bore, internal tightening design, easy installation. Diaphragm coupling is suitable for connecting servo motors, stepper motors and encoders.
    SKU: ATO-SC-GLM1927
    30-day Returns
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    Delivery date: 6-12 days

    Two diaphragms coupling bore 4mm to 8mm, length 27mm, width 19mm. For occasions where the load is frequently started or the working load changes, the coupling acts as a buffer for protection.


    Model ATO-SC-GLM1927
    Length 27mm
    Width 19mm
    Bore 4mm to 8mm
    Rated Torque 1 N.m
    Allow Eccentricity 0.12mm
    Allowable Deflection Angle 1.5∠°
    Allowable Axial Deviation ±0.18
    Allowable Speed 10000 RPM
    Static Torsional Stiffness 700N.m/rad
    Moment of Inertia 9.6 x 10-7
    Weight 18g
    Certificate ISO9001, REACH, RoHS
    Warranty 12 Months

    Shaft Coupling Bore 4mm to 8mm Dimension (unit: mm)

    Shaft coupling dimension

    d1/d2 Inner Diameter Size Φd L LF LP S φd3 F M Tightening Torque
    3-4-4.5-5-6-6.35-7-8 19 27 9.1 5.2 1.8 8.5 3.9 M2.5 1 N.m


    Diaphragm coupling split graph


    Shaft Diameter Keyway Standard Machining Dimensions Keyway Size
    d1/d2 b t (bXh)
    Width of groove Tolerance Depth of groove Tolerance
    φ6~φ7.9 2 ±0.0125 1 ±0.10 2x2
    φ8~φ10 3 1.4 3x3
    φ10.1~φ12 4 ±0.0150 1.8 4x4
    φ12.1~φ17 5 2.3 5x5
    φ17.1~φ22 6 2.8 6x6
    φ22.1~φ30 8 ±0.0180 3.3 ±0.20 8x7
    φ30.1~φ38 10 3.3 10x8
    φ38.1~φ44 12 ±0.0215 3.3 12x8
    φ44.1~φ50 14 3.8 14x9
    φ50.1~Ф58 16 4.3 16x10
    φ58.1~φ65 18 4.4 18x11

    Keyway Machining Standard Drawing

    Diaphragm coupling keyway dimension

    Tips: Structure of diaphragm coupling

    Diaphragm coupling is a metal flexible coupling, which is a transmission device that uses a metal elastic diaphragm as a flexible element to transmit torque. Its main features: large torque transmission capacity, diaphragm deformation to absorb the misalignment of the unit, no relative movement between the parts, no wear, no noise, long vibration damping life, and no need for lubrication. The torsional stiffness and critical speed can be adjusted by changing the outer diameter or wall thickness of the intermediate section, thereby improving the torsional vibration characteristics of the unit.

    The diaphragm coupling is composed of at least one diaphragm and two shaft sleeves. The diaphragm is fastened to the sleeve with a pin and generally will not loosen or cause backlash between the diaphragm and the sleeve. Some manufacturers provide two diaphragms, and some provide three diaphragms, with one or two rigid elements in the middle, and the two sides are connected to the shaft sleeve. The difference between the single diaphragm coupling and the double diaphragm coupling is the ability to handle various deviations. In view of the complex bending of the diaphragm, the single diaphragm coupling is not suitable for eccentricity. The double diaphragm coupling can bend in different directions at the same time to compensate for eccentricity.

    Existing reviews of Two Diaphragms Coupling, 4mm to 8mm
    Works great on my motor
    Diaphragm coupling works great with my motor, works as designed, good load capacity, great coupler, cheap price, received product better than I expected, highly recommend.
    From: Aiden | Date: 13/04/2022
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