Answers about the SDM double diaphragm coupling for servo encoders and precision drive systems, including misalignment compensation, speed, torque, reversing, lubrication, and ordering details.
The SDM double diaphragm coupling is designed for precise torque transmission between servo motors, encoders, and other drive components. It uses two stainless steel diaphragm groups and a lightweight anodized aluminum alloy center sleeve. The design provides zero backlash, high torsional rigidity, and compensation for axial, radial, and angular shaft misalignment.
Double diaphragm coupling questions and answers
What is the SDM double diaphragm coupling used for?
The SDM coupling suits precision transmission in servo motor encoders, CNC machinery, 3D printers, laser engravers, and precision robotics. Zero backlash supports accurate positioning, while high torsional rigidity helps maintain the relationship between connected shafts. See the SDM aluminum alloy double diaphragm coupling for the product details.
How much shaft misalignment can the coupling compensate for?
The SDM coupling compensates for axial misalignment from ±0.08 to ±0.9 mm, radial misalignment from 0.03 to 0.55 mm, and angular misalignment from 1 to 1.5°. The value depends on the selected coupling size. For a machine retrofit, measure the shaft positions and angular relationship before selecting the model.
What speed and torque ranges are available?
The maximum rotational speed is up to 10,000 RPM, with a torque range from 0.25 Nm to 100 Nm. Select the coupling according to the motor torque, operating speed, and reversing duty. The balance grade is G6.3 under ISO 1940, which is relevant when the coupling is used in a high-speed servo assembly.
Does the coupling require lubrication or routine maintenance?
The SDM coupling requires no lubrication. Its torque transmission uses stainless steel diaphragm groups and elastic deformation, with no mechanical friction parts. Its maintenance-free design suits drive assemblies where access for regular lubrication is limited. Include the coupling and its shaft connections in the normal equipment inspection routine.
Is the SDM coupling suitable for frequent reversing?
Yes. The SDM coupling is intended for high-speed rotation and frequent bidirectional movement. Its aluminum alloy construction reduces inertia, and the diaphragm design provides zero backlash for positioning applications. A reversing application should be matched to the required torque, speed, and shaft dimensions.
How is the coupling installed and adjusted?
The SDM coupling uses clamp-style fastening. This allows shaft adjustment during installation when the coupling is accessible in the drive assembly. Before requesting a selection, send the two shaft diameters, bore arrangement, shaft spacing, operating speed, torque, and any available installation drawing. These details allow the coupling size and fit to be checked for the intended assembly.
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Julu County Binhao Transmission Equipment Co., Ltd.
Established in 2015 and located in the Industrial Park of Julu County, Xingtai City, Hebei Province, Binhao covers an area of 30 acres with 12,000 square meters of standardized workshops and over 120 employees. As a high-tech enterprise, we specialize in R&D, design, manufacturing, and sales of coupling products.…
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