Specification Brand : Coavoo BulletPoint : Wide Range of Usage: Flexible Shaft Coupling is Suitable to Offset Axial, Radial and Angular Displacements and Dampen Vibrations and Torque Shocks for 3D Printer DIY Encoder CNC Router Machine Servo Stepped Motor and Engraving Drilling Milling Machine BulletPoint1 : 2 Pack coupler coupling, the bore hole for the stepper servo motor shaft 8mm, for ball screw end 12mm, OD 30mm, total length 40mm, always with the ballscrew SFU2004 SFU2005 SFU2010 BulletPoint2 : The coupler dimensions is standard, we can make the size as your requirements for customization, including the bore diameter for the motor shaft, and the hole diameter for the ball screw; we also have other styles to choose about the OD and total length, please message us if you need BulletPoint3 : The shaft coupling has bigger outer diameter, so with higher torque, higher rigidity, good vibration resistance, flexible response and durability in removes stress between the motor and driving components BulletPoint4 : Shaft Coupler Material: Aluminum alloy, Surface oxidation treatment; Type: Plum shaped BulletPoint5 : Widely Used:The shaft couplers are widely used for stepper motor, servo motors, spindle as the cnc ball screw, lead screw parts for the 3d printer router engraving milling machine ExteriorFinish : Aluminum ItemName : Coavoo Pulm Flexible Coupling Coupler 8mm to 12mm 2PCS, Aluminum Flexible Jaw Spider Plum Coupling D30L40 Connector for 3D Printer CNC Machine and Stepped Servo Motor ItemPackageDimensions_Height : 6.7056 centimeters ItemPackageDimensions_Length : 3.7084 centimeters ItemPackageDimensions_Width : 4.9022 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : spider-couplings Manufacturer : Coavoo Material : Aluminum MetalType : Alloy Steel ModelNumber : CO-2-LZQ-D30L40-D8D12 NumberOfItems : 2 PartNumber : CO-2-LZQ-D30L40-D8D12 ProductDescription : Brand: Coavoo The package includes: 2 Pack coupling / coupler ProductSiteLaunchDate : 2022-11-09T09:39:07.036Z Size : 2Pcs D8D12 Coupler Style : Parts SupplierDeclaredDgHzRegulation : not_applicable