Custom Parallel Key
( Made-to-Order Keys)

Custom parallel keys are flat key components commonly used in power transmission applications. Similar in shape to standard keys, they are designed without fixed dimensions and are ideal for special shaft diameters, legacy equipment, or customized assemblies.

All dimensions—including width, height, length, tolerances, and chamfer angles—can be fully customized to meet specific design or replacement needs.

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Product Features

• Structure: Full-length rectangular flat key profile

• Flexible Dimensions: No standard size limitations; fully customizable upon request

• Tolerance Options: Compatible with H7/h9 fits for shafts and hubs

• Versatile Applications: Ideal for replacing obsolete specs, non-standard sizes, or custom prototypes
   

​​​​Materials & Surface Treatments

• S45C (Carbon Steel): Can be heat treated (HRC 20–45) for enhanced torque capacity and wear resistance

• SUS304 (Stainless Steel): Excellent corrosion resistance, ideal for food machinery, electronics, and automation

• SUS316 (Stainless Steel): Superior anti-corrosion properties, suitable for marine, medical, and high-humidity environments

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Size Range

• Width (b): 2mm – 50mm

• Height (h): 2mm – 36mm

•   Length (L): Standard lengths or fully custom per drawing
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Applications

• Torque transmission between shafts and hubs

• Keying for gears, pulleys, and sprockets

• Precision mechanical drives and automation systems

• Motor shaft end locking and positioning

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Customization & Notes

• Supports drawing-based fabrication, custom lengths/tolerances/chamfers

• Recommended keyway fit: H7 shaft / h9 key

• Small-batch prototyping and fast delivery available

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