Knurler with Fine, Medium, Coarse Knurls

This scissor's knurling tool is made to our design, specifically for the mini lathe. This knurler fits in the standard tool post of the mini lathe without any modification. This knurling tool also works with any of the quick-change tool posts we sell.

The design allows for controlled, parallel motion of the knurling wheels against the rotating workpiece, ensuring a uniform pattern and minimizing tool or workpiece deflection. This tool holder reduces lateral forces, thereby preventing distortion of delicate or thin-walled parts.

The tool holder accommodates different types of knurling wheels—straight, diagonal, or diamond—to create various surface textures that improve grip, aesthetics, and functionality of components such as handles, shafts, and knobs. It comes with the following diamond knurls:

• Fine (33 lines per inch, 0.8 mm pitch)
• Medium (21 lines per inch, 1.2 mm pitch)
• Coarse (14 lines per inch, 1.8 mm pitch) diamond knurls.

The mounting bar is 3/8" (9.5 mm) tall so it replaces a 3/8" tool bit.

Constructed from high-grade alloy steel, the knurling tool holder offers excellent rigidity, wear resistance, and long service life even under demanding machining conditions. It is heat-treated and ground to precise tolerances for enhanced durability and stability. 

Here is how to figure out stock diameters for even knurls, based on work by Walt White.

Knurling is usually pretty forgiving of the diameter of the stock you knurl, but if you use the diameters calculated you are pretty much guaranteed success.

The knurls are held in place with 1/4" retaining rings. If you are going to change the knurls, go to your local hardware store and get some 1/4" retaining rings. (Or get them here.) The ones you get in the US will have proper holes for the pins of the retaining ring pliers and you will be able to re-use them. The retaining rings that come on the knurlers are pretty much one-use clips.