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- 19x19 Lead Screws and Nuts
GS19 Coupling 19×19 D40XL66 Machined Ready Size
Original price was: 12.96$.5.83$Current price is: 5.83$.


















12 mm Shafts with Support and Bearings
16 mm Shafts with Support and Bearings
20 mm Shafts with Support and Bearings
25 mm Shafts with Support and Bearings
30 mm Shafts with Support and Bearings
SBR Bearing Types
Shafts with Support
Shafts with Support and Bearings (12 mm)
Shafts with Support and Bearings (16 mm)
Shafts with Support and Bearings (20 mm)
Shafts with Support and Bearings (25 mm)
Shafts with Support and Bearings (30 mm)
Shafts with Support and Bearings (40 mm)
TBR Bearings




1/3 Ratio Planetary Gearboxes
1/3 Ratio Planetary Gearbox Options
1/3 Ratio Planetary Gearbox Varieties
1/5 Ratio Planetary Gearbox Options
1/5 Ratio Planetary Gearbox Series
1/10 Ratio Planetary Gearboxes
1/10 Ratio Planetary Gearbox Options
1/10 Ratio Planetary Gearbox Varieties
Servo Motor Planetary Gearboxes
Stepper Motor Planetary Gearboxes
Varvel Zero-Backlash Gearboxes






















12 mm Shafts with Support and Bearings
16 mm Shafts with Support and Bearings
20 mm Shafts with Support and Bearings
25 mm Shafts with Support and Bearings
30 mm Shafts with Support and Bearings
SBR Bearing Types
Shafts with Support
Shafts with Support and Bearings (12 mm)
Shafts with Support and Bearings (16 mm)
Shafts with Support and Bearings (20 mm)
Shafts with Support and Bearings (25 mm)
Shafts with Support and Bearings (30 mm)
Shafts with Support and Bearings (40 mm)
TBR Bearings




1/3 Ratio Planetary Gearboxes
1/3 Ratio Planetary Gearbox Options
1/3 Ratio Planetary Gearbox Varieties
1/5 Ratio Planetary Gearbox Options
1/5 Ratio Planetary Gearbox Series
1/10 Ratio Planetary Gearboxes
1/10 Ratio Planetary Gearbox Options
1/10 Ratio Planetary Gearbox Varieties
Servo Motor Planetary Gearboxes
Stepper Motor Planetary Gearboxes
Varvel Zero-Backlash Gearboxes




Showing 11 products
The 40 mm Coupling GS19 is a mechanical component designed to connect motor shafts to lead screws or other rotating shafts. It is engineered to absorb vibration and misalignment between connected shafts, ensuring smoother operation and protecting sensitive machinery components. This specific model, GS19, refers to its series or design type, offering a 40 mm diameter for robust applications.
40 mm couplings like the GS19 are crucial in various CNC and automation systems. They are commonly used in the drive systems of CNC routers, milling machines, lathes, and 3D printers to connect servo motors or stepper motors to lead screws or ball screws. Their role is vital in applications requiring precise motion control and vibration damping, such as automated assembly lines, robotic arms, and precision positioning systems.
When selecting a 40 mm coupling, consider the torque requirements, shaft diameters to be connected, speed of rotation, and the degree of misalignment or vibration expected. For the GS19 model, ensure your motor and screw shaft diameters are compatible with its bore sizes. Check material specifications for durability and environmental resistance. For applications requiring high precision and minimal backlash, specific coupling types might be more suitable. You can explore various options in our couplings category.
The 40 mm Coupling GS19 is designed for compatibility with standard motor shaft and lead screw sizes commonly found in industrial automation and CNC machinery. Its primary use case is to provide a flexible yet rigid connection that dampens torsional vibrations and compensates for minor axial, radial, or angular misalignments. This ensures efficient power transmission and extends the lifespan of motors and screws in demanding operational environments.
Mermak CNC, based in the Ankara Uzay Sanayi region, has been a manufacturer and supplier of CNC spare parts and machinery for approximately 16 years. We pride ourselves on offering high-quality components like the 40 mm Coupling GS19. Our commitment is to provide reliable solutions for your automation and machining needs, backed by extensive industry experience.
At Mermak CNC, the stock quantities and prices displayed on our website are always up-to-date. Products shown in stock are prepared directly from our Ankara Uzay Sanayi factory/warehouse, meaning no waiting for production. This ensures prompt shipment rather than production delays, allowing us to serve international clients efficiently.
We understand the needs of our international customers. Mermak CNC ensures careful packaging for all shipments. We provide all necessary invoices and documents and meticulously track shipments until they reach you. Our experienced team works with reliable logistics partners to ensure smooth delivery. We can also provide product videos or factory/warehouse tours via WhatsApp or other contact channels upon request, offering transparency and confidence in your purchase.
Yes, Mermak CNC has established supply and international shipment processes for numerous countries. We regularly serve customers in the United Kingdom, the United States, Canada, Australia, Ireland, New Zealand, South Africa, and many other international markets. Our logistics network is designed to handle global distribution efficiently, ensuring your components arrive safely, wherever your business is located.
For every international order, Mermak CNC provides comprehensive documentation, including the necessary invoices and shipping manifests. We offer shipment tracking services, allowing you to monitor your order’s progress from our facility to your doorstep. Our team is dedicated to ensuring a transparent and secure shipping process for all our global clients.









