Specification Brand : Etfbuy BulletPoint1 : Compatible with the 8mm/0.31" end of the hexagonal shaft. BulletPoint2 : The flexibility of the coupler eliminates the stress between the motor and the drive components. BulletPoint3 : Made of aluminum alloy, it has high durability and stability. BulletPoint4 : Suitable for 3D printers and small replacement for CNC machine tools. Replacement for the NEMA 17 brand stepper motor (shaft diameter from 5 mm to 8 mm). BulletPoint5 : It has the function of buffering, damping and improving the dynamic performance of shaft series. ExteriorFinish : Silver ExternallyAssignedProductIdentifier1 : 634529051078 ExternallyAssignedProductIdentifier2 : 0634529051078 ExternallyAssignedProductIdentifier3 : 00634529051078 ItemName : 5 x 8mm Replacement for D20L25 Stepper Motor Shaft Coupler Flexible Coupling Connector ItemPackageDimensions_Height : 13.7 centimeters ItemPackageDimensions_Length : 1.8 centimeters ItemPackageDimensions_Width : 7 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : beam-couplings Manufacturer : Etfbuy Material : Aluminum MaximumRotationalSpeed : 6000 rpm ModelNumber : PSR12-2.5-2.5-SS NumberOfItems : 1 PartNumber : / ProductDescription : Name: Replacement for D20L25 Elastic Coupling Color: Silver Material: Aluminum alloy Size: Diameter 20mm/0.79"", length 25mm/0.98"", both ends of the aperture of 5mm/0.19"", 8mm/0.31"" Features: 1. Compatible with the 8mm/0.31"" end of the hexagonal shaft. 2. The flexibility of the coupler eliminates the stress between the motor and the drive components. 3. Made of aluminum alloy, it has high durability and stability. 4. Suitable for 3D printers and small replacement for CNC machine tools. Replacement for the NEMA 17 brand stepper motor (shaft diameter from 5 mm to 8 mm). 5. It has the function of buffering, damping and improving the dynamic performance of shaft series. ProductSiteLaunchDate : 2023-06-28T06:27:51.893Z Size : 5mm StreetDate : 2017-03-12T00:00:01Z Style : Modern SupplierDeclaredDgHzRegulation : not_applicable UnspscCode : 26111500