5mm to M10 Shaft Adapter - 775 Motor Grinder & Saw Blade Stud

Specification	Details
Inner Diameter	5.0 mm (Motor Shaft Fit)
Outer Thread	M10 (10mm)
Material	Hardened Carbon Steel
Mounting Type	Dual Grub Screw (Set Screw)
Compatible Motor	775 / 755 / 795 DC Motors
Finish	Anti-Rust Black Oxide

Price

₹ 72.03

(Tax included)

Barcode: 96381

Product Description

The 5mm Shaft Adapter Stud Connector is a heavy-duty mechanical coupler designed to transform a standard 775 DC motor into a versatile power tool. By converting the 5mm smooth motor shaft into a threaded M10 stud, this adapter allows for the direct mounting of angle grinder discs, circular saw blades, sanding pads, and drill chucks. Precision-machined from high-strength steel, it utilizes a dual-grub screw locking mechanism to ensure a non-slip grip even under high torque and high RPM applications. This connector is the essential component for DIY enthusiasts looking to build custom bench grinders, mini table saws, or portable cutting tools using high-torque DC motors.

Key Features

High Torque Transmission: The dual-point set screw system provides superior mechanical locking, preventing the adapter from spinning freely on the motor shaft during heavy loads.
M10 Universal Threading: Optimized for compatibility with standard 4-inch (100mm) angle grinder accessories and saw blades commonly available in hardware stores.
Hardened Steel Construction: Built to withstand the centrifugal forces and heat generated by high-speed 12V-24V DC motors without warping or stripping threads.
Precision Bore: The 5mm internal diameter is machined to tight tolerances for a "press-fit" feel, minimizing axial runout (wobble) and vibration.
Corrosion Protection: Treated with a black oxide finish to resist rust and oxidation, ensuring long-term durability in workshop environments.

Technical Details

Total Length: ~30mm to 42mm (Variant dependent).
Screw Type: M4 Hex Grub Screws.
Accessories Included: Typically includes the matching Allen key and flange nuts for blade mounting.

Prototyping and Engineering Tips from Robogears

Reducing Vibration: CRITICAL: To achieve a "true" spin with zero wobble, ensure the motor shaft is clean and free of burrs. Tighten the two grub screws incrementally—turn the first one slightly, then the second, then back to the first—to center the adapter perfectly on the shaft.
The Flat-Spot Hack: If your 775 motor shaft is perfectly round, use a small metal file or a Dremel to create a tiny "flat spot" where the grub screws sit. This provides a "mechanical shoulder" that prevents the adapter from flying off if the screws loosen over time.
Thrust Bearing Care: 775 motors are powerful but not always designed for heavy "axial" (pushing) loads. When using a saw blade with this adapter, try to avoid pushing too hard against the motor. If your project requires heavy pressure, consider adding an external bearing block to support the shaft.
Thread Direction Awareness: Standard M10 threads are right-handed. If your motor rotates counter-clockwise (CCW) while cutting, the resistance may actually loosen the nut. Always ensure your motor rotation direction "tightens" the nut against the blade during operation.
Safety Housing: Never operate a 775 motor with a saw blade or grinder disc attached without a protective guard. These motors can reach 15,000+ RPM; a shattering disc or a loose adapter at these speeds is extremely dangerous. Use a 12V 10A to 20A Power Supply for consistent torque.

Package Includes

1 x 5mm Shaft Adapter Stud (M10 Thread)
2 x M4 Grub Screws
1 x Matching Allen Key
2 x Flange Nuts (Inner & Outer)

Disclaimer: This adapter is intended for DIY prototyping and light-duty hobbyist use. Always wear safety goggles and gloves when operating high-speed rotating machinery. Ensure all screws and nuts are fully tightened before applying power. Not recommended for industrial-scale heavy milling or high-precision lathe work.