M3x30mm 304 Stainless Steel Dowel Pin (Cylindrical Locating Shaft)

Product Description

The M3x30mm 304 Stainless Steel Dowel Pin is a high-precision, solid metal shaft that is absolutely critical for building rigid and perfectly aligned mechanical assemblies. Manufactured to the strict GB119 standard, this 3mm diameter by 30mm long cylindrical rod features a perfectly smooth surface and slightly chamfered ends, allowing it to slide precisely into printed plastic parts, metal brackets, and bearing inner races without catching or binding.

Because it is made from premium 304 stainless steel, this locating pin offers exceptional shear strength and high resistance to wear and workshop corrosion. It is highly popular in the custom 3D printing community, specifically acting as the structural shaft for the gantry idlers and bearing stacks (often paired with F695 bearings) in advanced CoreXY machines like the Voron Trident and Voron 2.4.

Unlike standard threaded screws which can grind against bearings and introduce slop into your motion system, this smooth solid rod ensures your CNC belts and 3D printer pulleys rotate flawlessly on a perfectly cylindrical axis.

Key Features

• Precise Dimensions: Exact 3mm outer diameter and 30mm length for tight-tolerance mechanical fits.

• Premium 304 Stainless Steel: Highly durable, rust-resistant, and capable of withstanding heavy shear forces in moving assemblies.

• GB119 Standard: Manufactured to strict engineering tolerances to ensure a perfectly straight, solid shaft.

• Chamfered Ends: The slightly rounded edges make it easy to press-fit the pin into 3D-printed ABS parts or aluminum CNC brackets.

• Smooth Surface: Provides an ideal, low-friction resting axis for rotating bearings and pulleys, eliminating the grinding caused by threaded screws.

Applications

• Acting as the primary idler shaft for Voron Trident and Voron 2.4 gantry bearing stacks

• Precise alignment locating pins for DIY CNC router frames and aluminum extrusions

• Hinge pins and rotational joints for custom electronics enclosures and laser engraver chassis

• General robotics, mechanical prototyping, and heavy-duty RC applications