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Best Choice tooloflife 
ToolOfLife 4/5/6.35/8/10/12/14mm Rigid Flange Coupling Motor Guide Shaft Coupler Motor Connector ✔Flange coupling is made of 45# steel, heat and electroplated process make it sturdiness and insulation.uxcell 
uxcell 8mm to 8mm Bore Rigid Coupling Set Screw L22XD14 Stainless Steel,Shaft Coupler Connector,Motor Accessories,2pcs Connection Diameter: 8mm to 8mm, Total Length: 22mm /0.87 inch, Outside Diameter : 14mm/ 0.55 inchBest Value Treehobby 
6Pack ZYCST Aluminium Alloy Shaft Coupling Rigid Stepper Motor Wheel Coupler Joint Connector for DIY Car Boat Airplane 3 Suitable for connecting two axis with different diameters, can also be connected with a motor axis, or connecting shaftsVGOL 
VGOL 2PCS 5mm to 8mm Shaft Couplers Aluminum Alloy Casing Rigid Coupling Compatible with Ender 3 V2 Ender 3 PRO Ender 3 Package includes 2pcs 5mm to 8mm shaft couplers.cizihuu 
Rigid Flange Coupling Motor Guide Shaft Coupler Motor Connector,2PCS Inner Diameter 6mm Please select the size you need.BQLZR 
BQLZR Blue 6mm to 6mm Aluminum Shaft Coupling Rigid Coupling Coupler Motor Connector with Spanner Pack of 2 Scope of application: widely used in blowers, 3D printers, DIY robots, CNC machine tools, stepper motors, etc.Generic 
2PCS 10mm Inner Dia H13*D16 Rigid Flange Coupling Motor Guide Shaft Coupler Motor Connector Silver Tone for DIY Parts Inner Diameter: 10mm/0.39 inch, Total Height: 13mm/0.51 inch, Cylinder Outer Diameter: 16mm/0.63 inch, Cylinder Height:uxcell uxcell 5mm to 5mm Bore Rigid Coupling Set Screw L20XD12 Aluminum Alloy,Shaft Coupler Connector,Motor Accessories,Red Connection Diameter: 5mm to 5mm, Total Length: 20mm /0.78 inch, Outside Diameter : 12mm/ 0.47 inchCHANCS CHANCS Motor Shaft Rigid Brass Sleeve Coupling 5mm to 8mm Bore Rigid Coupling Set Screw Motor Accessories for DIY Parts Motor Shaft Rigid Brass Sleeve Coupling offer high torque, stiffness, low inertia and excellent sensitivity. Hexagonal CYALIYA YALIYA 8mm Flange Coupling Connector, Rigid Guide Steel Model Coupler Accessory, Shaft Axis Fittings for RC Model Motors [Wide Range of Use] flange coupler is produced based on Flange Standard, widely used in model shaft connection, perfectAkeady 1pc Rigid Flange Coupling, 2 3 3.17 4 5 6 6.35 7 8 10 11 12 14mm Aluminum Shaft Coupler, Motor Guide Shaft Coupler Conne Includes 1pc of 2 3 3.17 4 5 6 6.35 7 8 10 11 12 14mm.(Optional)HOMOCONO HOMOCONO Aluminum Alloy Flange Coupling Rigid Flange Shaft Coupling Sprocket Hub Adapter for DIY Parts Rigid flange coupling--the secure connection method of this coupling ensures stable and transmission, significantly reduCHANCS CHACNS Power Tool Parts Outer Diameter 10 mm Inner Diameter 5 mm Flange Coupling Connector Rigid Metal with High Hardnes * Flange coupling is a special coupling that can attach a shaft to a flat surface and easily install other accessories ouxcell uxcell 3mm to 6mm Bore Rigid Coupling Set Screw L20XD12 Aluminum Alloy,Shaft Coupler Connector,Motor Accessories,Red,2pc Connection Diameter: 3mm to 6mm, Total Length: 20mm /0.78 inch, Outside Diameter : 12mm/ 0.47 inchuxcell uxcell 6mm Inner Dia H12*D10 Rigid Flange Coupling Motor Guide Shaft Coupler Motor Connector 2 PCS for DIY Parts Inner Diameter: 6mm/0.24 inch, Total Height: 12mm/0.47 inch, Cylinder Outer Diameter: 10mm/0.39 inch, Cylinder Height: 1uxcell uxcell Shaft Coupling, 1/2" Bore 1" OD 1-1/2" Length Black Oxide Plated Steel Rigid Coupling for 3D Printers Motor Wheel Size: 1/2 inch bore rigid set screw coupling, with 1 inch outside diameter, 1-1/2 inch length. (2 set screws)uxcell uxcell 6mm to 8mm Bore Rigid Coupling Set Screw L22XD14 Stainless Steel,Shaft Coupler Connector,Motor Accessories Connection Diameter: 6mm to 8mm, Total Length: 22mm /0.87 inch, Outside Diameter : 14mm/ 0.55 inchSorandy 5 Pack 2mm Flange Coupling Connector, Rigid Guide Steel Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Mo Material】2mm flange coupling connector is made of 45 steel, which is strong, wear resistant and has a long service life.uxcell uxcell 8mm Inner Dia H13*D16 Rigid Flange Coupling Motor Guide Shaft Coupler Motor Connector 2PCS for DIY Parts Inner Diameter: 8mm/0.31 inch, Total Height: 13mm/0.51 inch, Cylinder Outer Diameter: 16mm/0.63 inch, Cylinder Height: 1ANCIRS 2 Pack Flange Coupling Connector, Rigid Guide Steel Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors 【Durable Material】 Ancirs coupling connector is made of fine plating steel, heat and electroplated process make it sturduxcell uxcell 7mm Inner Dia H13*D16 Rigid Flange Coupling Motor Guide Shaft Coupler Motor Connector for DIY Parts Inner Diameter: 7mm/0.28 inch, Total Height: 13mm/0.51 inch, Cylinder Outer Diameter: 16mm/0.63 inch, Cylinder Height: 1uxcell uxcell 10mm Inner Dia H13*D16 Rigid Flange Coupling Motor Guide Shaft Coupler Motor Connector Silver Tone 2 PCS for DIY Inner Diameter: 10mm/0.39 inch, Total Height: 13mm/0.51 inch, Cylinder Outer Diameter: 16mm/0.63 inch, Cylinder Height:uxcell uxcell 2mm to 5mm Bore Rigid Coupling Set Screw L20XD10 Aluminum Alloy,Shaft Coupler Connector,Motor Accessories,Light B Connection Bore Diameter: 2mm to 5mm; Total Length: 20mm /0.79 inch, Outside Diameter : 10mm/ 0.39 inch; with M3 ScrewsSluffs 5Pcs 6mm Flange Shaft Coupling Flange Coupling Connector Rigid Guide Model Coupler Accessory Shaft Axis Fittings for DIY Durable Material: Coupling connector is made of steel. Heating and electroplating process make it firm and insulated, anuxcell uxcell 2 Pcs Shaft Coupling, 5/16" Bore 5/8" OD 1" Length Black Oxide Plated Steel Rigid Coupling with Hex Wrench for 3D Size: 5/16 inch bore rigid set screw coupling, with 5/8 inch outside diameter, 1 inch length, and with a hex wrench anduxcell uxcell 10mm to 10mm Bore Rigid Coupling Set Screw L22XD16 45# Steel,Shaft Coupler Connector,Motor Accessories Connection Diameter: 10mm to 10mm, Total Length: 22mm /0.87 inch, Outside Diameter : 16mm/ 0.63 inchuxcell uxcell 11mm Inner Dia H13*D18 Rigid Flange Coupling Motor Guide Shaft Coupler Motor Connector Silver Tone for DIY Parts Inner Diameter: 11mm/0.43 inch, Total Height: 13mm/0.51 inch, Cylinder Outer Diameter: 18mm/0.71 inch, Cylinder Height:uxcell uxcell 5mm to 10mm Bore Rigid Coupling Set Screw L25XD20 Aluminum Alloy,Shaft Coupler Connector,Motor Accessories Connection Bore Diameter: 5mm to 10mm; Total Length: 25mm/0.98 inch, Outside Diameter: 20mm/0.78 inch; with M4 Screwsshamjina 4x 5mm Metal Rigid Flange Coupling Brand new and high qualityuxcell uxcell 8mm Inner Dia H13xD10 Rigid Flange Coupling Motor Guide Shaft Coupler Motor Connector for DIY Parts Black 2pcs Material: Iron Plating;Color: Black;Inner Diameter: 8mm/0.31 inch;Total Height: 13mm/0.51 inch;Cylinder Outer Diameter:CENPEK CENPEK 4Pcs 8mm Flange Coupling Connector Rigid Guide Model Coupler Accessory Shaft Axis Fittings for DIY RC Model Motor Coupling connector is made of fine plating steel, heat and electroplated process make it sturdiness and insulation, striuxcell uxcell 4mm Inner Dia H12xD10 Rigid Flange Coupling Motor Guide Shaft Coupler Motor Connector for DIY Parts 4Pcs Inner Diameter: 4mm/0.15 inch;Total Height: 12mm/0.47 inch;Cylinder Outer Diameter: 10mm/0.39 inch;Cylinder Height: 10mmuxcell uxcell 5mm to 5mm Bore Rigid Coupling Set Screw L22XD14 Stainless Steel,Shaft Coupler Connector,Motor Accessories Connection Diameter: 5mm to 5mm, Total Length: 22mm /0.87 inch, Outside Diameter : 14mm/ 0.55 inchuxcell uxcell 6.35mm to 6.35mm Bore Rigid Coupling Set Screw L25XD14 Aluminum Alloy,Shaft Coupler Connector,Motor Accessories,B Connection Diameter: 6.35mm to 6.35mm, Total Length: 25mm /0.98 inch, Outside Diameter : 14mm/ 0.55 inchuxcell uxcell 8mm to 8mm Bore Rigid Coupling Set Screw L25XD16 Aluminum Alloy,Shaft Coupler Connector,Motor Accessories,Light B Connection Bore Diameter: 8mm to 8mm; Total Length: 25mm/0.98 inch, Outside Diameter : 14mm/0.55 inch; with M4 Screwsuxcell uxcell Rigid Screw Coupling 12mm to 12mm Shaft Coupler Connector L22mm x D18mm Steel Joint Connector Rigid Coupling Set This durable connector, made from high-strength, heat-resistant steel, keeps a reliable connection between different shaANKROYU 2pcs M4 Rigid Flange Coupling Motor Shaft Coupler Connector for Machinery Connecting Shafts, Stainless Steel Material,12 [Superior Durability from Premium Iron Material]:These motor shaft couplers are constructed using premium iron that is eSG Store SG Store 4Pcs Flange Coupling Connector 5mm with Screws and M3 Hex Wrench for DIY Handmade Model RC Model Motors Hole Di Inner Diameter:5mm, Cylinder Outer Diameter:10mm, Cylinder Height:10mm, Base Height:2mm,Total Height:12mm, Mounting Holeuxcell uxcell 5mm Inner Dia H12*D10 Rigid Flange Coupling Motor Guide Shaft Coupler Motor Connector 2 PCS for DIY Parts Inner Diameter: 5mm/0.19 inch, Total Height: 12mm/0.47 inch, Cylinder Outer Diameter: 10mm/0.39 inch, Cylinder Height: 1uxcell uxcell 8mm Inner Dia H13xD16 Rigid Flange Coupling Motor Guide Shaft Coupler Motor Connector for DIY Parts 4Pcs Inner Diameter: 8mm/0.31 inch;Total Height: 13mm/0.51 inch;Cylinder Outer Diameter: 16mm/0.63 inch;Cylinder Height: 10mmuxcell uxcell 12mm Inner Dia H13*D18 Rigid Flange Coupling Motor Guide Shaft Coupler Motor Connector for DIY Parts Inner Diameter: 12mm/0.47 inch, Total Height: 13mm/0.51 inch, Cylinder Outer Diameter: 18mm/0.71 inch, Cylinder Height:CHANCS CHANCS Motor Shaft Rigid Sleeve Coupling 4mm to 5mm 100MM Long Steel Shaft Diameter 5mm Bore Rigid Coupling Set Screw fo Motor Shaft Rigid Brass Sleeve Coupling offer high torque, stiffness, low inertia and excellent sensitivity ,you can useuxcell uxcell 5mm to 8mm Bore Rigid Coupling Set Screw L25XD14 Aluminum Alloy,Shaft Coupler Connector,Motor Accessories,Blue Connection Diameter: 5mm to 8mm, Total Length: 25mm /0.98 inch, Outside Diameter : 14mm/ 0.55 inchuxcell uxcell 10mm Rigid Flange Coupling Motor Guide Shaft Coupler Motor Connector for DIY Parts Country of Manufacture: CHINA; Material: Metaluxcell uxcell 6mm Inner Dia H12xD10 Rigid Flange Coupling Motor Guide Shaft Coupler Motor Connector for DIY Parts 4Pcs Inner Diameter: 6mm/0.23 inch;Total Height: 12mm/0.47 inch;Cylinder Outer Diameter: 10mm/0.39 inch;Cylinder Height: 10mmuxcell uxcell 7mm to 8mm Bore Rigid Coupling Set Screw L25XD14 Aluminum Alloy,Shaft Coupler Connector,Motor Accessories,Dark Bl Connection Bore Diameter: 7mm to 8mm; Total Length: 25mm /0.98 inch, Outside Diameter : 14mm/ 0.55 inch; with M4 ScrewsTopHomer 4mm to 5mm Bore Rigid Coupling Set Screw, Shaft Coupler Connector for Airplane Boat Motor Accessories Electric Car Toy PREMIUM COPPER MATERIAL---The shaft coupling is made of high-quality copper material, which has high compressive strengtuxcell uxcell 6mm to 10mm Bore Rigid Coupling 22mm Length 16mm Diameter Motor Shaft Coupler Connector C45 Steel Silver Tone Connection Bore Diameter: 6mm to 10mm; Total Size: 22x16mm/0.86''x0.63''(LxD).uxcell uxcell 3mm Inner Dia H13*D10 Rigid Flange Coupling Motor Guide Shaft Coupler Motor Connector Black 2 PCS for DIY Parts Inner Diameter: 3mm/0.12 inch, Total Height: 13mm/0.51 inch, Cylinder Outer Diameter: 10mm/0.39 inch, Cylinder Height: 1uxcell uxcell 6mm to 8mm Bore Rigid Coupling Set Screw L25XD18 Aluminum Alloy,Shaft Coupler Connector,Motor Accessories Connection Bore Diameter: 6mm to 8mm; Total Length: 25mm/0.98 inch, Outside Diameter : 18mm/0.7 inch; with M4 Screwssourcing map sourcing map 3mm to 6mm Bore Rigid Coupling Set Screw L20XD12 Aluminum Alloy,Shaft Coupler Connector,Motor Accessories,R Connection Diameter: 3mm to 6mm, Total Length: 20mm /0.78 inch, Outside Diameter : 12mm/ 0.47 inchTopHomer Flange Coupling Connector, 2 Pcs 3mm Rigid Guide Model Coupler Accessory with Fastening Screw and Wrench for DIY RC Mode [Material]: The flange coupling connector is made of high quality aluminum alloy, sturdy and stable, wear resistant andHealvian Healvian 4pcs Shaft Couplings Magnetic Stirring Rod Flexible Shaft Couplings 5mm to 8mm Aluminum Alloy Joint Connector R Shaft Coupling for Printer Use: This flexible shaft coupling is ideal for connecting servo motors, stepper motors, encodAkeady 1pc D20L25 Rigid Shaft Couplings, D1-3 4 5 6 8 10mm Flexible Shaft Coupling, D2-3 4 5 6 6.35 8 10mm Shaft Coupler Joint( Includes 1pc of D20L25 Rigid Shaft Couplings, D1-3 4 5 6 8 10mm, D2-3 4 5 6 6.35 8 10mm. (Optional)Dusehu Bore Rigid Coupling Set Screw - 2 Flexible Shaft Coupling Printer Accessories - Flexible Aluminum Alloy Shaft Coupling E ✧Optimized for Your Printing Needs: With its variety of specifications, our Printer Shaft Coupling is perfect for fittinuxcell uxcell 4mm to 4mm Bore Rigid Coupling, 20mm Length 9mm Diameter, Copper Shaft Coupler Connector, Brass Tone 2Pcs [Specification] Connection Bore Diameter: 4mm to 4mm; Total Length: 20mm / 0.79 inch, Outside Diameter : 9mm / 0.35 inchGeneric Daseeme 3pcs Rigid Shaft Coupler 5-8mm Bore L23xD18 for CNC Machine & 3D Printer Stepper Motor Rigid shaft coupling, compatible with 3D printer, CNC machine, stepper motor, etc.Sluffs 5Pcs Bore Rigid Coupling Set 5mm to 8mm Shaft Coupler Connector Stainless Steel Coupler Rigid Couplings for 3D Printers Steel Material: Made of premium steel material, this bore coupling is strong and sturdy, corrosion resistant and possesssourcing map sourcingmap 6mm to 8mm Bore Rigid Coupling Set Screw L22XD14 Copper,Shaft Coupler Connector,Motor Accessories Connection Bore Diameter: 6mm to 8mm; Total Length: 22mm/0.87 inch, Outside Diameter : 14mm/0.55 inch; with M4 ScrewsPOCHY Bore Rigid Coupling Set Screw, Portable Car Model Shaft for 3D Printer, Eco-Friendly 3D Printer Joint Connector Rust-Pro Variety of Coupling: Our 3D Printer Shaft Coupling provides a range of specifications to fit different shaft diameters aKiBcsLic KiBcsLic 1 Set of Rigid Iron Flange Coupling Accessories for Models, 5mm accessories for RC Model motor, etc.Disertied D25L30 5/6/6.35/8/10/12mm Aluminum Flexible Shaft Coupler Clamping Rigid Coupling Motor Connector D25 L30(9.52mm to 12mm D25L30 5/6/6.35/8/10/12mm Aluminum Flexible Shaft Coupler Clamping Rigid Coupling Motor Connector D25 L30DRBASJHFO DRBASJHFO Motor Guide Shaft Coupler Rigid Flange Coupling 3mm to 12mm Bore(11MM bore) Material: SteelDRBASJHFO DRBASJHFO Rigid Flange Coupling Inner Diameter 3-14mm 1pc(Hole 8MM) Rigid shaft coupling is simplicity in structure,high torsional rigidity,no backlash, for high-speed rotationDRBASJHFO DRBASJHFO Rigid Flange Coupling Shaft Coupler 3-14mm Multiple Sizes Motor Connector(3.17MM bore) Rigid shaft coupling is simplicity in structure,high torsional rigidity,no backlash, for high-speed rotationDRBASJHFO DRBASJHFO Rigid Flange Coupling Multiple Sizes for CNC Servo Motor(3.17mm) Material: Fine plating of ironANKROYU ANKROYU Bore Coupling Steel Cylinder Rigid Coupling 8mm Fine Edges Durable for Motor Hardware Mold Mechanical Transmissi [PREMIUM STEEL CONSTRUCTION] Crafted from highgrade 45# steel these bore couplings offer exceptional strength and durabiJOROBURO Shaft Coupling, 5 Pcs Brass Shaft Coupling 22mm Length 14mm OD 5 to 8mm ID Bore Rigid Coupler Motor Shaft Connector Shaf Durable Construction: Crafted from premium brass material, ensuring long-lasting durability and resistance to wear and teMagTech eMagTech 4Pcs 8mm to 8mm Metal Shaft Coupling Universal Joint Shaft Coupling Flexible Coupling Connector Accessories for Package : You will get 4x 8mm to 8mm metal shaft coupling, 16x screw, 1x wrench.DRBASJHFO DRBASJHFO 1pc Rigid Flange Coupling Bore Multiple Sizes Motor Guide Shaft Coupler Motor Connector(3mm) Rigid shaft coupling is simplicity in structure,high torsional rigidity,no backlash, for high-speed rotationDRBASJHFO DRBASJHFO 1pc Rigid Flange Coupling Bore Multiple Sizes Motor Guide Shaft Coupler Motor Connector(3mm) Rigid shaft coupling is simplicity in structure,high torsional rigidity,no backlash, for high-speed rotationDRBASJHFO DRBASJHFO Motor Shaft Guide Rigid Flange Coupling Coupler Support Connector Multiple Sizes(10mm) Rigid shaft coupling is simplicity in structure,high torsional rigidity,no backlash, for high-speed rotationBQLZR BQLZR Shaft Rigid Couplings 6mm Blue D14L25 for 3D Printer CNC Machine Part Pack of 4 The shaft couplers are widely applied to small CNC machines encoding and 3D printers Z shaft coupling, simplifies the deDRBASJHFO DRBASJHFO Motor Shaft Coupler Rigid Flange Coupling Connector 3-14mm(ID 11mm) Rigid shaft coupling is simplicity in structure,high torsional rigidity,no backlash, for high-speed rotationDRBASJHFO DRBASJHFO Rigid Flange Coupling Motor Guide Shaft Coupler Connector 3-14mm Bore(11mm bore) Rigid shaft coupling is simplicity in structure,high torsional rigidity,no backlash, for high-speed rotationB Blesiya Metal Flange Shaft Coupling Rigid Flange Coupling Motors Guide Shaft Bearing of 4 Pack Perfect accessories for RC Model motor, etc.NULYLU NULYLU 4pcs Flange Coupling: High Hardness Rigid Shaft Fittings - Flange Plate - Precision Guide Shaft Coupler for Heavy rigid flange coupling: ensures stable power transmission, making it ideal for heavy duty mechanical connection scenariosDRBASJHFO DRBASJHFO 2 Pack Flange Rigid Shaft Coupling Multiple Sizes(3mm bore) Rigid shaft coupling is simplicity in structure,high torsional rigidity,no backlash, for high-speed rotationDRBASJHFO DRBASJHFO M4 Rigid Flange Coupling 7mm 8mm 10mm Bore(7mm) The overall height is 13mm, the distance between the opposite sides of the base is 24mm,DRBASJHFO DRBASJHFO Rigid Flange Coupling Motor Shaft Coupler 3-10mm Bore(3mm) Rigid shaft coupling is simplicity in structure,high torsional rigidity,no backlash, for high-speed rotationsourcing map sourcing map 5mm to 6mm Bore Rigid Coupling Set Screw L22XD14 Copper,Shaft Coupler Connector,Motor Accessories,2pcs Connection Diameter: 5mm to 6mm, Total Length: 22mm /0.87 inch, Outside Diameter : 14mm/ 0.55 inchsourcing map sourcing map 8mm to 8mm Bore Rigid Coupling Set Screw L25XD18 Aluminum Alloy,Shaft Coupler Connector,Motor Accessories,2 Connection Bore Diameter: 8mm to 8mm; Total Length: 25mm/0.98 inch, Outside Diameter:18mm/0.7 inch; with M4 ScrewsDRBASJHFO DRBASJHFO 3 pcs Rigid Flange Coupling Motor Guide Shaft Coupler Connector Multiple Bore Sizes(3mm bore) Rigid shaft coupling is simplicity in structure,high torsional rigidity,no backlash, for high-speed rotationNovent Bore Rigid Coupling Set Screw - Lightweight Printer Shaft Coupling Accessories - Aluminum Alloy Shaft Coupling Stepper M ⇥Variety of Coupling: Our Printer Shaft Coupling provides a range of specifications to fit different shaft diameters andDRBASJHFO DRBASJHFO Rigid Flange Coupling 3-10mm Motor Shaft Guide Connector(6MM bore) Rigid shaft coupling is simplicity in structure,high torsional rigidity,no backlash, for high-speed rotationBE-TOOL 5PCS Couplings Shaft, BE-TOOL Various Sizes Rigid Coupling Aluminum Shaft Coupling with Spanner and M4 Screw for DIY Mod Three Types Coupler，26 different sizes for your choosingDRBASJHFO DRBASJHFO 2pcs Flange Rigid Shaft Coupling 3-6.35mm Bore(6.35MM bore) Rigid shaft coupling is simplicity in structure,high torsional rigidity,no backlash, for high-speed rotationDRBASJHFO DRBASJHFO Rigid Flange Coupling Multiple Bore Sizes Motor Guide Shaft Coupler and Connector(8MM BORE) Rigid shaft coupling is simplicity in structure,high torsional rigidity,no backlash, for high-speed rotationDRBASJHFO DRBASJHFO Rigid Flange Coupling 3mm to 14mm Motor Connector Shaft Axis Bearing Fitting(6.35mm) Rigid shaft coupling is simplicity in structure,high torsional rigidity,no backlash, for high-speed rotationRigid-Flexible Coupling Hoisting Robots: Modeling, Analysis, and Control DRBASJHFO DRBASJHFO 45 Steel Rigid Flange Coupling Bearing Support Connector for Motor Guide Shaft 3-12mm Bore(6mm) Material:45 SteelDRBASJHFO DRBASJHFO Rigid Flange Coupling Motor Guide Shaft Coupler Connector Shaft Axis Bearing Fittings Multiple Sizes(4mm) Rigid shaft coupling is simplicity in structure,high torsional rigidity,no backlash, for high-speed rotationDRBASJHFO DRBASJHFO Rigid Flange Coupling 7mm 8mm 10mm 11mm 12mm 14mm(10mm) Side Fixed Hole Screw: M3/M4Springer Rigid-Flexible Coupling Dynamics and Control of Flexible Spacecraft with Time-Varying Parameters ANKROYU ANKROYU 6mm Flange Shaft Coupling Rigid Durable Steel Motor Connector for RC Model Motors and Mechanical Transmission Si [PREMIUM STEEL CONSTRUCTION] Crafted from high-quality steel with heating and electroplating treatment, this flange coupDRBASJHFO DRBASJHFO Rigid Flange Coupling 3-14mm Inner Hole Motor Guide Shaft Coupler(7mm) Material: 45 Steel, hardened by heat treatment, and then electroplatedPLAFOPE PLAFOPE Motor Guide Shaft Coupler 4 Pcs Flange Couplings Rigid Flanged Joints for Airplane Boat Motor coupler: flexibility of this coupler removes stress between motor and driving component,flange coupling connector.Generic 3Pcs Rigid Shaft Coupling 5Mm To 8Mm Bore L23Xd18 Shaft Coupler C Ector For 3D Printer Stepper Cnc Silver 3Pcs 🌻Rigid shaft coupling, compatible with 3D printer, CNC , stepper , etc.Oshhni oshhni Rigid Metal Flange Shaft Coupling Flange Coupling Guides - 8mm Perfect accessories for RC Model motor, etc.Mingzhe Mingzhe 3pcs Rigid Shaft Coupling 5mm to 8mm Bore L23xD18 Shaft Coupler Connector for 3D Printer Stepper Motor CNC Machi Made of high quality aluminum alloy, durable and wear resistant.