| Bulk Pricing | ||
|---|---|---|
| QTY | Unit Price(Inlc. GST) | |
| 25+ | ₹195.02 ₹ 165.27 + 29.75 GST | |
| 50+ | ₹193.03 ₹ 163.58 + 29.45 GST | |
| 75+ | ₹191.04 ₹ 161.9 + 29.14 GST | |
| 100+ | ₹189.05 ₹ 160.21 + 28.84 GST | |
Securely mount wheels and mechanisms to your 8mm motor shafts! This rigid metal flange coupler features a 32mm outer diameter, four mounting holes, and includes two M4 set screws for a tight, slip-free connection.
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MACH3 CNC USB Interface Driver 4 Axis Controller Board Machine ₹2,799.00 Robust Shaft Connection The 8mm Rigid Metal Flange Coupler is the perfect hardware solution for securely attaching wheels, gears, or custom flat mechanisms to an 8mm rotating shaft. Unlike flexible couplings, this rigid hub ensures zero backlash and maintains a perfectly perpendicular 90-degree angle between the shaft and the mounted component.
Precise Dimensions Designed for exact fitment, this coupler is machined with precision. The inner bore diameter (d) is exactly 8mm to match standard NEMA stepper motors and DC gear motors. The total height of the coupler (H) is 13mm. This total height is made up of a 3mm thick flat flange base (h2) and a 10mm high central boss (h1). The flange provides a wide surface area with an overall outer diameter (D) of 32mm.
Secure Mounting and Integration To prevent the hub from slipping under high torque, the 16mm diameter central boss (d1) is drilled and tapped with M4 threads (d3). Two black set screws are included to firmly lock the coupler against the flat edge of a D-shaft or bite into a round shaft. For mounting your wheel or plate, the flat flange features four mounting holes (d2) sized at 4mm (compatible with M3 hardware). These mounting holes are spaced apart with a diagonal pitch (L) of 24mm.
Specifications
Inner Bore Diameter (d): 8mm
Outer Flange Diameter (D): 32mm
Total Height (H): 13mm
Flange Thickness (h2): 3mm
Center Boss Diameter (d1): 16mm
Center Boss Height (h1): 10mm
Mounting Hole Diameter (d2): 4mm (M3 Compatible)
Mounting Hole Diagonal Pitch (L): 24mm
Set Screw Thread (d3): M4
Material: Rigid Metal Alloy
Key Applications and Projects
Robotics Chassis: Mounting heavy Mecanum, Omni, or standard rubber wheels directly to the 8mm shafts of high-power DC gear motors.
DIY CNC Machines & 3D Printers: Coupling large timing belt pulleys or custom lead screw mounts to NEMA 23 stepper motors.
Rotary Actuators: Attaching custom acrylic or metal arms and levers to motorized pivots for animatronics or mechanical displays.
Unlock New Capabilities (Project Evolution) The Heavy-Duty Omni-Directional Rover: Move beyond basic differential drive! By utilizing four of these 8mm flange couplers, you can solidly mount a set of heavy-duty Mecanum wheels to four independent DC gear motors. Because these couplers are rigid and provide zero backlash, your microcontroller's PID motor control algorithms will translate into immediate, precise lateral and diagonal movements, allowing you to build an industrial-grade rover capable of complex pathing!
1 x 8MM Rigid Metal Flange Coupler
2 x M4 Set Screws (Grub Screws)
1. What is the exact inner bore diameter? The inner bore (d) is precisely 8mm, designed to slip smoothly over standard 8mm motor shafts.
2. What is the outer diameter of the flat flange? The flange has a total outer diameter (D) of 32mm.
3. How tall is the entire coupler assembly? The total overall height (H) of the coupler from top to bottom is 13mm.
4. How thick is the flange base? The flat flange base has a thickness (h2) of 3mm.
5. What is the diameter of the raised center section? The raised center boss has an outer diameter (d1) of 16mm.
6. What is the height of the center boss alone? The center boss height (h1) protruding above the flange is 10mm.
7. What is the distance between the mounting holes? The diagonal distance or pitch (L) between the opposite flange mounting holes is 24mm.
8. What size are the mounting holes on the flange? The four mounting holes (d2) are 4mm in diameter. This allows for standard M3 bolts to pass through easily, or M4 bolts if tapped/forced depending on tolerances.
9. How does the coupler secure to the motor shaft? It secures using two M4 set screws that thread into the side of the central boss and press tightly against the motor shaft.
10. What thread size are the set screws? The tapped holes (d3) for the set screws use an M4 thread size.
11. Are the set screws included with the purchase? Yes, two black M4 set screws are included with the metal coupler.
12. Is an Allen wrench/hex key included? No, a hex key is not included. You will need a standard metric hex key to tighten the M4 set screws.
13. What material is this coupler made from? It is manufactured from a solid, rigid metal (typically a zinc-plated steel or heavy aluminum alloy).
14. How many mounting holes are on the flange? There are four mounting holes evenly spaced at 90-degree intervals around the flat flange.
15. Is this a flexible coupling? No, this is a completely rigid flange coupling. It will not flex to accommodate shaft misalignment.
16. Can I use this to mount a robot wheel? Absolutely. Flange couplers are the industry standard for mounting custom plates, gears, or robot wheels to motor shafts.
17. Will this fit a standard NEMA 17 stepper motor? Standard NEMA 17 motors usually have a 5mm shaft, so this will be too large. This is designed for NEMA 23 stepper motors or geared DC motors that utilize an 8mm shaft.
18. Can it mount to D-profile shafts? Yes, it works exceptionally well with D-shafts. Ensure you align one of the set screws so it presses flat against the flat portion of the D-shaft for maximum hold.
19. Can I mount a pulley to this flange? Yes, as long as the pulley has a matching mounting hole pattern (24mm diagonal pitch) or can be custom-drilled to match.
20. Do I need to use threadlocker on the set screws? While not strictly required, using a mild threadlocker (like blue Loctite) on the set screws is highly recommended for robotics or high-vibration applications to prevent them from vibrating loose over time.
| Coupler Type | Rigid |
|---|---|
| Mounting Type: | Shaft-Flange |
| Shaft Bore Size-Side A (mm) | 8 |
| Shaft Bore Size-Side B (mm) | NA |
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Probots sells every Electronics Part for your next Project. You can order 10,000+ Electronic Parts Online - Arduino, Raspberry Pi, NodeMCU Development Boards, Sensors, Motors, Motor Drivers, SMPS, Plastic Enclosures etc in India directly on probots.co.in
We offer specialized services for Bulk, Wholesale & B2B Customers like discounted prices, additional shipping options, customised products, etc . Customer with large quantity & regular orders qualify for the specialised discounted rates.
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⭐⭐⭐⭐⭐ Excellent experience at this electronic equipment store! They have a good range of quality electronic products at reasonable prices. The staff is polite, knowledgeable, and helpful in choosing the right products. Great customer service and a smooth shopping experience. Highly recommended for anyone looking for electrical equipment! 👍
Best
A very great place for electronics Such a well maintained shop... Felt good shopping here
Nice
For new developments kit available and they will support till working, and I suggest this place strongly
This place has all the electronic parts students will ever need, staff is friendly and the place is organised.
Had a great experience at ProBots Koramangala! The staff was friendly, helpful, and professional. The overall environment was excellent, and I really appreciated the support and guidance provided throughout. Everything was well organized and smooth. Highly recommended for anyone looking for a good experience with robotics and technology! ⭐⭐⭐⭐⭐
It was a really nice experience! I was happy to find such a wide range of robotics kits for kids, suitable for different age groups and learning levels.
Excellent experience
Get better components in right place
Good stuff
Buyed them. But no bargain. Helpful staff.
if you have opted for store pickup, there is no clear communication, although the staff took accountability and did the needful
I had ordered online from Probots.co.in, and set Probots-KMG shop as self pickup. They messaged in whatsapp, once the order was packed and ready for pickup by rapido/porter. Good service.
Available all children school project spears parts like electronics
It was good experience
⭐⭐⭐⭐⭐ Excellent experience at this electronic equipment store! They have a good range of quality electronic products at reasonable prices. The staff is polite, knowledgeable, and helpful in choosing the right products. Great customer service and a smooth shopping experience. Highly recommended for anyone looking for electrical equipment! 👍
Best
A very great place for electronics Such a well maintained shop... Felt good shopping here
Nice
For new developments kit available and they will support till working, and I suggest this place strongly
This place has all the electronic parts students will ever need, staff is friendly and the place is organised.
Had a great experience at ProBots Koramangala! The staff was friendly, helpful, and professional. The overall environment was excellent, and I really appreciated the support and guidance provided throughout. Everything was well organized and smooth. Highly recommended for anyone looking for a good experience with robotics and technology! ⭐⭐⭐⭐⭐
It was a really nice experience! I was happy to find such a wide range of robotics kits for kids, suitable for different age groups and learning levels.
Excellent experience
Get better components in right place
Good stuff
Buyed them. But no bargain. Helpful staff.
if you have opted for store pickup, there is no clear communication, although the staff took accountability and did the needful
I had ordered online from Probots.co.in, and set Probots-KMG shop as self pickup. They messaged in whatsapp, once the order was packed and ready for pickup by rapido/porter. Good service.
Available all children school project spears parts like electronics
It was good experience
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