Specification Brand : FIYA BulletPoint1 : Shaft Usage: 8mm to 8mm / 0.31 to 0.31 inch (Shaft Usage: 8mm to 8mm / 0.31 to 0.31 inch BulletPoint2 : Material: Aluminum alloy; Size: 40x25mm/ 1.57x0.98inch( L*D) (Material: Aluminum alloy; Size: 40x25mm/ 1.57x0.98inch( L*D) BulletPoint3 : Feature: Screw Type(Coiling Clamping); Main Color: Silver tone (Feature: Screw Type(Coiling Clamping); Main Color: Silver tone BulletPoint4 : Flexibility of coupling shaft removes stress between the motor and driving components. (Flexibility of coupling shaft removes stress between the motor and driving components. BulletPoint5 : The shaft couplers are widely applied to small CNC machines encoding and 3D printers Z shaft coupling, simplifies the debugging difficulty. (The shaft couplers are widely applied to small CNC machines encoding and 3D printers Z shaft coupling, simplifies the debugging difficulty. Color : Multiple Colors ExteriorFinish : Silver ItemName : IIVVERR Motor Shaft 8mm to 8mm Joint Helical Beam Coupler Coupling 25mm Dia 40mm Length (Motor Shaft 8mm to 8mm Joint Helical Beam Coupler Coupling 25mm Dia 40mm Length ItemTypeKeyword : beam-couplings Manufacturer : IIVVERR MetalType : Aluminum PartNumber : 0451f02ebf617b2 ProductDescription : Motor Shaft 8mm to 8mm Joint Helical Beam Coupler Coupling 25mm Dia 40mm Length Description: 8mm to 8mm shaft usage diameter, 40mm length, 25mm diameter, set screw type, beam coupling. Zero backlash. One-piece metallic spring coupling. For little torque shaft connect. Absorption of , angular misalignments and shaft end-play by spring action. Widely used in drive systems for encoders, instrumentation,lead screws, small pumps, feed rollers and anywhere light to medium duty, torsionally flexible coupling is required. 0 Specification: Feature: Screw Type(Coiling Clamping) Size: 40x25mm/ 1.57x0.98inch( L*D) Material: Aluminum alloy Main Color: Silver tone Weight: 45g 0 Package Content: 1 x Shaft coupling Description in French Motor Shaft 8mm to 8mm Joint Helical Beam Coupler Coupling 25mm Dia 40mm Length Shaft Usage: 8mm to 8mm / 0.31 to 0.31 inch Material: Aluminum alloy; Size: 40x25mm/ 1.57x0.98inch( L*D) Feature: Screw Type(Coiling Clamping); Main Color: Silver tone Flexibility of coupling shaft removes stress between the motor and driving components. The shaft couplers are widely applied to small CNC machines encoding and 3D printers Z shaft coupling, simplifies the debugging difficulty.