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Knurling

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Best suited for softer metals such as aluminum and standard grade steel, frequently knurled objects include tool handles, metal flashlights, knurled nuts, knurled control knobs, barbell bars, metal shafts, knurled winged screws, mechanical pencils and metal tubes. Knurling is particularly useful when it comes to assembling a high precision part into a hole in a low precision part when the hole does not closely match the diameter of the high precision part. Read More…

Knurling Knurling is a manufacturing process in which a rough, patterned texture is created on the surface of a metal in order to provide a grip as well as for aesthetic purposes. Accomplished through the use of specialized CNC turning tools, knurled patterns are visually appealing and are often more easily gripped than smooth surfaces.
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Leading Manufacturers

Reed City, MI  |  231-832-2356

H & R Screw Machine Products-ISO 9001-certified manufacturer of high-volume screw machine products for many industries. We also produce CNC turned parts and provide machining of customer supplied castings, forgings and stampings.

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H & R Screw Machine Products, Inc. $$$

Brentwood, NY  |  800-238-3929

It is Thuro’s mission to be the leading choice for screw machine parts, and to offer our products at the highest quality and the lowest cost. Our team members dedicate themselves to ensuring that our customers receive the perfect part on time, every time.

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Thuro Metal Products, Inc. $$$

Calabasas, CA  |  866-317-0208

Pacific West America, Inc. offers a wide variety of products and services including precision turning. We use Swiss CNC Turning for our more intricate parts. We use a variety of materials such as, aluminum, steel, brass, among others.

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Pacific West America, Inc. $$$

Easton, PA  |  610-253-9626

Founded in 1978, Randolph Mfg. has been recognized as one of the top screw machine shops in PA, starting with QS9000 certification in 2002 to meet the automotive industry’s requirements. We’ve continued our certifications and transitioned to ISO when QS became obsolete. We provide full traceability from raw bars of steel, brass and aluminum, to order fulfillment. PPAP capable, we ensure our quality policy of Quality, Service & Value are met for every customer, large & small.

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Randolph Manufacturing Corporation $$$

Rochester, NY  |  585-464-9000

At Kaddis Manufacturing, our amazing employees provide service that not only meets but also anticipates our customers’ needs. We work hard to make sure that we always deliver products that meet our customers’ needs and exceed their expectations. From the specialized raw materials we use, to our top-quality machinery, the products we deliver are always the best of the best. Our quality programs are based on the process approach as outlined in ISO9001-2015. Call us today for more information!

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Kaddis Manufacturing Corporation $$$
placeholder image H & R Screw Machine Products, Inc. Thuro Metal Products, Inc. Pacific West America, Inc. Randolph Manufacturing Corporation Kaddis Manufacturing Corporation

The knurled pattern on the high precision part presses into the knurled walls of the low precision part and forges a connection that otherwise would not have been. In addition, knurling offers extensive manufacturing and repair applications that allow knurling companies to serve diverse industries such as electronics, automotive, construction, aerospace, telecommunications, fitness equipment and marine.

Most often conducted on a lathe, knurling is commonly achieved through the same automatic-feed mechanisms that are used to form screw machine products. Knurling tools are used in conjunction with the lathe and enable the embossing of the pattern. Embossing is the process of creating a three-dimensional design on a part or material.

There are four general knurling patterns: annular rings, straight, angular and diamond knurl. These knurling patterns can be used independently or in a combination. Annular rings are most often used when using a plastic mating component. While annular rings allow for easy mating, the ridges can make the components difficult to pull apart. A straight knurling pattern is also referred to as a linear knurl pattern and consists of a series of linear straight ridges. The straight ridges can also be formed into helical grooves referred to as a helical knurling pattern.

Angular knurling consists of straight ridges in an angular direction and is typically used in order to give extra traction to an external handle or other connective piece. The most common type of knurling pattern for hand grips is diamond knurl because it creates the most traction between a user's hand and the handle. A diamond knurl consists of a criss-cross pattern of ridges.

Knurling Informational Video