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Knurls
Straight
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Left-Hand Spiral
Get a grip—pair these knurls with a knurling tool to form patterns on your workpiece to make it easy to twist, grip, and pull. Also known as full face or standard knurls, they have a consistent pattern with sharp unbeveled edges suitable for most uses. All knurls have a ground finish to make precise, clean marks. To form a diamond pattern—common for tool handles, knobs, and fasteners—machine your material with both a right- and left-hand spiral.
M1 high-speed tool steel knurls work well on most materials.
Teeth per inch (TPI) determines how fine your pattern is. The higher the number, the smoother, more closely spaced your pattern will be. A tool handle is usually knurled with 30 TPI. A precision instrument knob would require an 80 TPI.
| Dia. | Face Wd. | Hole Dia. | Finish | For Use On | Choose No. of Teeth Per Inch | Each | |
Straight—M1 High-Speed Tool Steel | |||||||
|---|---|---|---|---|---|---|---|
For Coarse Finish | |||||||
| 5/8" | 1/4" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 16 | 00000000 | 000000 |
| 5/8" | 5/16" | 7/32" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 14 | 00000000 | 00000 |
| 3/4" | 1/4" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 16 | 00000000 | 00000 |
| 3/4" | 3/8" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 0000000 | 00000 | |
| 1" | 3/8" | 5/16" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 14 | 00000000 | 00000 |
For Medium Finish | |||||||
| 1/2" | 3/16" | 3/16" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 0000000 | 00000 | |
| 5/8" | 1/4" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 0000000 | 00000 | |
| 5/8" | 5/16" | 7/32" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 21 | 00000000 | 00000 |
| 3/4" | 1/4" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 0000000 | 00000 | |
| 3/4" | 3/8" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 00000000 | 00000 | |
For Fine Finish | |||||||
| 1/2" | 3/16" | 3/16" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 00000000 | 00000 | |
| 5/8" | 1/4" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 00000000 | 00000 | |
| 5/8" | 5/16" | 7/32" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 33 | 00000000 | 00000 |
| 3/4" | 1/4" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 00000000 | 00000 | |
| 3/4" | 3/8" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 00000000 | 00000 | |
Right-Hand Spiral—M1 High-Speed Tool Steel | |||||||
For Coarse Finish | |||||||
| 5/8" | 1/4" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 16 | 000000000 | 00000 |
| 5/8" | 5/16" | 7/32" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 14 | 000000000 | 00000 |
| 3/4" | 1/4" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 16 | 000000000 | 00000 |
| 3/4" | 3/8" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 00000000 | 00000 | |
| 1" | 3/8" | 5/16" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 14 | 00000000 | 00000 |
For Medium Finish | |||||||
| 1/2" | 3/16" | 3/16" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 00000000 | 00000 | |
| 5/8" | 1/4" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 00000000 | 00000 | |
| 5/8" | 5/16" | 7/32" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 21 | 000000000 | 00000 |
| 3/4" | 1/4" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 000000000 | 00000 | |
| 3/4" | 3/8" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 000000000 | 00000 | |
For Fine Finish | |||||||
| 1/2" | 3/16" | 3/16" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 000000000 | 00000 | |
| 5/8" | 1/4" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 000000000 | 00000 | |
| 5/8" | 5/16" | 7/32" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 33 | 000000000 | 00000 |
| 3/4" | 1/4" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 00000000 | 00000 | |
| 3/4" | 3/8" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 000000000 | 00000 | |
Left-Hand Spiral—M1 High-Speed Tool Steel | |||||||
For Coarse Finish | |||||||
| 5/8" | 1/4" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 16 | 00000000 | 00000 |
| 5/8" | 5/16" | 7/32" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 14 | 00000000 | 00000 |
| 3/4" | 1/4" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 16 | 00000000 | 00000 |
| 3/4" | 3/8" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 0000000 | 00000 | |
| 1" | 3/8" | 5/16" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 14 | 0000000 | 00000 |
For Medium Finish | |||||||
| 1/2" | 3/16" | 3/16" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 0000000 | 00000 | |
| 5/8" | 1/4" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 0000000 | 00000 | |
| 5/8" | 5/16" | 7/32" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 21 | 00000000 | 00000 |
| 3/4" | 1/4" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 0000000 | 00000 | |
| 3/4" | 3/8" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 00000000 | 00000 | |
For Fine Finish | |||||||
| 1/2" | 3/16" | 3/16" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 00000000 | 00000 | |
| 5/8" | 1/4" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 00000000 | 00000 | |
| 5/8" | 5/16" | 7/32" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 33 | 00000000 | 00000 |
| 3/4" | 1/4" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 00000000 | 00000 | |
| 3/4" | 3/8" | 1/4" | Uncoated | Aluminum, Brass, Bronze, Nickel, Plastic, Stainless Steel, Steel, Titanium | 00000000 | 00000 | |
Manual Lathe Knurling Tools
Bump
Swivel Bump
Press a grip into your workpiece using your manual lathe. These tools use knurls with smooth, rounded teeth to form grooves on your material. Upon contact with your material, the tool head adjusts to center the knurls for a consistent pattern. Use left and right-hand spiral knurls together to create a diamond pattern—common for tool handles—in one go. When your knurls wear out, you can pop them out and replace them. You can also swap the included spiral knurls for straight ones.
Swivel bump knurling tools have three sets of knurls that you can rotate between: coarse, medium, and fine pitch.
Shank | Knurl | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Min. Workpiece Size | Wd. | Ht. | O'all Lg. | Material | Dia. | Face Wd. | Hole Dia. | Material | Includes | For Use On | Each | |
Bump | ||||||||||||
2 Knurling Wheels | ||||||||||||
| 1/4" | 5/16" | 3/4" | 6 1/4" | Steel | 5/8" | 5/16" | 7/32" | M4 High-Speed Tool Steel | One right-hand spiral knurl (21 teeth per inch) One left-hand spiral knurl (21 teeth per inch) | Aluminum, Brass, Bronze, Cast Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium | 00000000 | 0000000 |
| 1/4" | 3/8" | 7/8" | 6 1/4" | Steel | 5/8" | 5/16" | 7/32" | M4 High-Speed Tool Steel | One right-hand spiral knurl (21 teeth per inch) One left-hand spiral knurl (21 teeth per inch) | Aluminum, Brass, Bronze, Cast Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium | 00000000 | 000000 |
| 3/8" | 1/2" | 1 1/8" | 7 9/16" | Steel | 3/4" | 3/8" | 1/4" | M4 High-Speed Tool Steel | One right-hand spiral knurl (21 teeth per inch) One left-hand spiral knurl (21 teeth per inch) | Aluminum, Brass, Bronze, Cast Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium | 00000000 | 000000 |
| 3/8" | 5/8" | 1 3/8" | 7 9/16" | Steel | 3/4" | 3/8" | 1/4" | M4 High-Speed Tool Steel | One right-hand spiral knurl (21 teeth per inch) One left-hand spiral knurl (21 teeth per inch) | Aluminum, Brass, Bronze, Cast Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium | 00000000 | 000000 |
Swivel Bump | ||||||||||||
6 Knurling Wheels | ||||||||||||
| 1/4" | 5/16" | 3/4" | 6 1/2" | Steel | 5/8" | 5/16" | 7/32" | M4 High-Speed Tool Steel | One right-hand spiral knurl (14 teeth per inch) One right-hand spiral knurl (21 teeth per inch) One right-hand spiral knurl (33 teeth per inch) One left-hand spiral knurl (14 teeth per inch) One left-hand spiral knurl (21 teeth per inch) One left-hand spiral knurl (33 teeth per inch) | Aluminum, Brass, Bronze, Cast Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium | 0000000 | 000000 |
| 1/4" | 3/8" | 7/8" | 6 1/2" | Steel | 5/8" | 5/16" | 7/32" | M4 High-Speed Tool Steel | One right-hand spiral knurl (14 teeth per inch) One right-hand spiral knurl (21 teeth per inch) One right-hand spiral knurl (33 teeth per inch) One left-hand spiral knurl (14 teeth per inch) One left-hand spiral knurl (21 teeth per inch) One left-hand spiral knurl (33 teeth per inch) | Aluminum, Brass, Bronze, Cast Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium | 0000000 | 000000 |
| 3/8" | 1/2" | 1 1/8" | 6 1/2" | Steel | 3/4" | 3/8" | 1/4" | M4 High-Speed Tool Steel | One right-hand spiral knurl (14 teeth per inch) One right-hand spiral knurl (21 teeth per inch) One right-hand spiral knurl (33 teeth per inch) One left-hand spiral knurl (14 teeth per inch) One left-hand spiral knurl (21 teeth per inch) One left-hand spiral knurl (33 teeth per inch) | Aluminum, Brass, Bronze, Cast Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium | 0000000 | 000000 |
| 3/8" | 5/8" | 1 3/8" | 7" | Steel | 3/4" | 3/8" | 1/4" | M4 High-Speed Tool Steel | One right-hand spiral knurl (14 teeth per inch) One right-hand spiral knurl (21 teeth per inch) One right-hand spiral knurl (33 teeth per inch) One left-hand spiral knurl (14 teeth per inch) One left-hand spiral knurl (21 teeth per inch) One left-hand spiral knurl (33 teeth per inch) | Aluminum, Brass, Bronze, Cast Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium | 0000000 | 000000 |