In the architectural ironmongery industry, the most common purpose of the grub screw is to attach a door knob or door handle directly to the spindle shaft. Grub screws perform a great many different roles in various industries, such as in mechanics and engineering, where metal surfaces rub together and must not be obstructed by screw or bolt heads. This is useful in situations where a traditional nut and bolt fixing would either obstruct the operation of an item, or be aesthetically unacceptable. This is important, because the ability to secure without a nut makes the grub screw very versatile, and means that a grub screw can be used in applications that require a very small and unobtrusive fixing. So, what function does the grub screw perform? Well, the grub screw is generally used to secure an item against another item, without the use of a nut. This is because it is grooved, so that it may be threaded into a pre-existing threaded hole, rather than driven into a surface, like a traditional screw would be. Let's take a look at what causes this and how to resolve this problem, as well as asking what type of grub screw is best to use, and actually why it is that we use grub screws.Ī grub screw, also sometimes known as a 'set-screw' in North America and other countries, is actually rather confusingly a type of bolt. “My grub screws keep falling out, how can I fix this problem?” Is a question we are sometimes asked. The More Handles Technical guides series of articles aims to break down confusing industry jargon, and help explain the differences between similar items where confusion can easily occur. Vintage Cupboard Handles & Knobs View AllĪrchitectural Ironmongery can be a confusing place - filled with different terminology and jargon that can quickly become confusing.Luxury Cupboard Handles & Knobs View All.Unique Cupboard Handles & Knobs View All.Polished Nickel & Satin Nickel Cupboard Knobs.Polished Chrome & Satin Chrome Cupboard Knobs.Thumblatches & Privacy Latches View All.Aluminium & Stainless Steel Pull Handles.Polished & Satin Nickel Door Pull Handles.Antique Iron, Steel & Pewter Pull Handles.Polished Nickel & Satin Nickel Door Handles on Rose.Polished Chrome & Satin Chrome Door Handles on Rose.Stainless Steel & Aluminium Door Handles on Rose.Bronze & Antique Brass Door Handles on Rose.Aluminium & Stainless Steel Door Handles.Polished Nickel & Satin Nickel Door Handles.
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