Coupling (Shaft Coupling )

Coupling (shaft coupling) is a mechanical element used to connect a drive shaft and a driven shaft to transmit the motor's power to a device.

Couplings also play various roles in the connection between the drive and driven shafts, such as absorbing shaft misalignment (mounting error), softening motor vibration, suppressing heat transfer from the motor to the equipment, and preventing motor or equipment failure by damaging the coupling in the event of some problem.

What is a coupling (shaft coupling)?

・It is a part for connecting the shaft (driving unit side) and the shaft (driven unit side).

Coupling is used to connect the drive shaft (e.g. motor) to the driven machine such as a pump opposed. It is also called a shaft coupling.

Product photo

Role of coupling (shaft coupling)

Roles ①:Transmits rotational force (torque) to the opposit shaft.

Structural drawing

Roles ②:Absorbs mounting misalignment.

Structural drawing

Coupling products list

Jaw-Flex coupling (Elastomer Coupling ):Vibration absorption, Misalignment absorption

Elastomer Coupling has a simple structure with two hubs and one elasticity body (insert, spider), making it extremely easy to install/remove.

Tsubaki Elastomer Couplings and Jaw-Flex Couplings are available in two series: LN series which is non-backlash and excellent for vibration resistance at servomotor drives and shock absorption during startup and stopping, and L series which is available in a wide range of variations and is ideal for directly connecting general-use motors under light load.

Jaw-Flex coupling L Series

Model No.  L□□□S/M/H~

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This light-duty flexible coupling is ideal for direct connections of general-use motors.

  • ・Extensive Lineup of Finished Bore Hub in Stock :
    A broad range of bore combinations is possible with 63 types of bore machining and 499 combinations of bore diameters in stock.
  • ・Ideal for Direct Connection to Motor :
    Designed for high-speed and low-torque applications. Accommodates every size of general-use motors.
  • ・Insert Option :
    You can choose the insert suited for your applications. Please refer to the details page.
  • ・Simple Structure & Compact Size :
    Constructed with just three parts and designed to be compact.
    Simply move the coupling in an axial direction for connection/disconnection.
  • ・Cheap :
    The lowest-priced coupling in our range for direct connection to motors with a highly economical design.
  • ・Standardized Plated Hub & Aluminum Hub :
    The plated hub is fit for urethane and Hytrel® inserts, and resistant to corrosion.
    Aluminum hubs are also standardized.
Applicable shaft diameter

Φ5mm~Φ69mm

Torque range

0.4~711N・m

Insert type

S Type = Nitrile
M Type = Urethane
H Type = Hytrel

Backlash

Provided

Jaw-Flex coupling LN Series

Model No.  L□□U98A1/64D1~

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Delivers more vibration damping than our existing products by employing new material for the spider.

  • ・Excellent for vibration resistance at servomotor drives and shock absorption during startup and stopping.
  • ・With the combination of the optimally designed spider and hub, this Jaw-Flex Coupling series is capable of transmitting torque without backlash.
  • ・You can choose from between two types of spiders: 98A excellent for vibration damping; and 64D with high torsional stiffness and wear resistance.
  • ・Simply constructed with two hubs and one spider, uses a clamp shaft coupling method, making this coupling extremely easy to install.
  • ・Available for Taper-Lock Series. Contact a Tsubaki representative. (Made to order )
Applicable shaft diameter

Φ12mm~Φ42mm

Torque range

60~405N・m

Spider type

98A1:Hardness 98A
64D1:Hardness 64D

Backlash

None