A grub screw, also known as a set screw, is a small, headless screw with an internal hex socket. It is typically used to secure components in place, such as gears, pulleys, and knobs. Grub screws are available in a variety of sizes and materials, including stainless steel, brass, and nylon.
Grub screws have a wide range of applications in various industries and settings. They are commonly used in:
There are several types of grub screws, each designed for specific applications. The most common types include:
Grub screws are typically made from the following materials:
Choosing the right grub screw for your application involves considering several factors:
Installing and tightening grub screws is a straightforward process:
Pros:
Cons:
Grub screws and set screws are essentially the same type of fastener. The term "grub screw" is more commonly used in the UK, while "set screw" is more common in the US.
The size of the grub screw depends on the size of the hole in the component it is securing. Measure the hole diameter and refer to a grub screw size chart to determine the appropriate size.
Tighten the grub screw to a torque value that is appropriate for the size and material of the screw and the component it is securing. Overtightening can damage the component.
It is generally not recommended to reuse grub screws due to the risk of damage to the threads or hex socket. However, in less critical applications, a grub screw may be reused if it is in good condition.
A medium-strength thread locker is typically sufficient for most grub screw applications. However, consult the manufacturer's instructions for specific recommendations.
Use a screw extractor to safely remove a stripped grub screw. Drill a small hole into the center of the screw and insert the screw extractor. Rotate the extractor counterclockwise to remove the grub screw.
Grub screws can be purchased from hardware stores, automotive parts stores, and online retailers.
The cost of grub screws varies depending on the size, material, and type. Generally, they are relatively inexpensive, ranging from a few dollars to several dollars per piece.
Screw Diameter (mm) | Screw Length (mm) |
---|---|
2 | 4-12 |
3 | 5-15 |
4 | 6-18 |
5 | 8-20 |
6 | 10-24 |
Material | Applications |
---|---|
Stainless Steel | Outdoor uses, marine applications, corrosive environments |
Brass | Electrical connections, soft materials |
Nylon | Non-critical applications, electrical insulation, soft materials |
Type | Features |
---|---|
Socket Head Grub Screw | Hexagonal socket head, high torque capacity |
Slotted Head Grub Screw | Slotted head, easy to tighten |
Cup Point Grub Screw | Rounded head, easy to adjust |
Knurled Head Grub Screw | Knurled head, secure grip |
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