Soft touch knobs have become a popular alternative to traditional hard plastic and bare metal knobs. They are characterized by a soft texture. Soft touch knobs are still strong, but they have a naturally cushioned, sponge-like surface that’s comfortable to grip. While they all have a soft texture, however, soft touch knobs are available in different styles. Here’s how to choose the right soft touch knob for your next project.
Look for a Durable Insert
Make sure the soft touch knob has a durable insert. The insert is the inner piece that connects directly to a machine or device. Most soft touch knobs feature an insert that’s covered in a soft, semi-elastic material. Inserts made of strong and durable materials, such as zinc-plated steel, can withstand heavy use. Inserts made of cheap and low-quality materials, on the other hand, may fail prematurely.
Check the Outer Mold’s Hardness Rating
You should consider the outer mold’s hardness rating when choosing a soft touch knob. The outer mold, of course, is typically softer than the insert. The insert serves as the frame, whereas the outer mold provides a soft gripping surface. To determine exactly how soft, or hard, the outer mold is, check its hardness rating. A 48 rating on the Shore A scale, for instance, indicates the outer mold is soft. A 70 or higher rating indicates the outer mold is relatively hard.
Stud vs Tapped Mount Type
Soft touch knobs are available in stud and tapped mount types. Both types have a soft texture, but they are mounted in different ways. Stud knobs feature a threaded stud at the base. You can mount them by twisting the threaded stud into a threaded hole. Tapped knobs feature a threaded hole at the base. You can mount them by twisting them onto a threaded stud.
Choose a Comfortable Shape
Not all soft touch knobs are the same shape. Some of them are round, whereas others are lobed. What are lobed knobs exactly? Lobed knobs are characterized by a star-like shape. They typically feature five equally spaced points, which makes them easy to grab and turn. Round knobs, though, are smaller and more compact, making them ideal for applications with limited space.
Opt for the Right Thread Type
Soft touch nobs are available with both inch and metric threads. Always verify the thread size and depth to avoid future maintenance issues. A properly matched knob not only lasts longer but also provides consistent, reliable performance.