Specification Brand : HAHIYO BulletPoint1 : Tick flange:The flange on the bottom is solid and clean cut.Fit well between lead screws and motor shafts.They provide shock absorbsion by bigger contact area making smoother transitions.By using these you can stabilize the jerk mechanism result from the motors moving.After you place it on,the flange will work well with the set screws internally.That allows the connecting center to roll idealy. BulletPoint2 : Two set screws lock:Accurately machined smooth set screws.The coupling that come with the original could pop out of position if pressure was applied to the Z gantry and often require realignment.With two set screws lock so easy to use,you can easily secure the coupler in the position you want,getting the shafts centered properly and securely in the coupler. BulletPoint3 : Quality carbon steel:Made with high quality carbon steel,gives it corrosion resistance,enhanced durability.These edges are clean and smooth perfectly machined,not easy to cause deformation under pressure.No burrs to block the flange from sliding onto the shaft past the hole,the rod could pass through all the way out effortlessly even after months. BulletPoint4 : A breeze to put on:They fit well and are easy to install.The build-in set screws will save you from the trouble of bore extra holes and be more secure as well.This will got your coffee bean roasting drum back up and running.Working great,without bringing backlash or wobble.All you need to do is just to take the motors off and replace the old couplers,it could be done in minutes. BulletPoint5 : Multi-Function:These are nicely built flange coupling connector for your project.If your stepper motor shaft gets more and more unlevel,it’s time for you to use these and fix the problem.Great for a robotics projects,too.Or you can use it for remote control ship.More over,try to use them between a servo motors and an encoder.The improvement in quality is noticeable for difference purpose. Color : Blue DriveSystem : External Hex ExteriorFinish : Steel ExternallyAssignedProductIdentifier1 : 791809896221 ExternallyAssignedProductIdentifier2 : 0791809896221 FinishType : Polished ItemName : Hahiyo 7mm Inner Diameter Flange Coupling Connector with Set Screws Lock Sturdy Solid Cut Clean Rigid Guide Coupler Quality Carbon Steel Bright Finish 4 Sets for Stepper Motor 7mm 4Sets ItemPackageDimensions_Height : 30.4038 centimeters ItemPackageDimensions_Length : 1.6002 centimeters ItemPackageDimensions_Width : 8.509 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : set-screw-couplings Manufacturer : Hahiyo Material : Steel MetalType : Carbon Steel ModelNumber : 2021031202-Flange Coupling NumberOfItems : 4 PartNumber : 2021031202-Flange Coupling ProductDescription : Material:High quality carbon steel Size:Inner diameter 7mm Package Include: 4 Sets flange coupler These are nicely built flange coupling connector for your project.The improvement in quality is noticeable after replaced. ProductSiteLaunchDate : 2021-03-13T17:25:53.002Z Size : 7mm-4Sets Style : Rigid Couplings SupplierDeclaredDgHzRegulation : not_applicable UnspscCode : 31161700