Dog Point Grub Screw

Description

Dog Point Grub Screw, often referred to simply as a dog point set screw, is a specialized type of fastener used in mechanical engineering and industrial applications. Its primary function is to hold components together, often without the use of a nut, by threading into a tapped hole and exerting pressure through its tip. The “dog point” designation refers specifically to the shape of the tip of the screw, which is cylindrical and flat-ended, protruding beyond the thread diameter.

They are used for permanent location of one part to another. They have flat end with the threads stopping short of the end.

The tip is normally located into a groove in a shaft and allows the shaft to rotate whilst retaining the part in place.

The end is spotted in hole drilled in shaft or against flat (milled). They often replace dowel pins. Works well against hardened members or hollow tubing.

It is used traditionally to hold one or more objects in place both safely and securely. They are also commonly used in guiding industrial parts into drilled holes.

Applications of Dog Point Grub Screw

Dog point grub screws are highly versatile and are used across various industries. Their primary function is to secure one object within another, especially in mechanical assemblies involving rotating parts. Typical applications include:

• Securing collars, gears, and pulleys to shafts

• Locating components with precision on a shaft or assembly

• Detent mechanisms, where the screw acts as a stop or positioning pin

• Alignment in jigs and fixtures, where repeatability is key

• Robotics and automation: Used in joints and arms where movement control is required

• Electronics and instrumentation: When a small, precise fastener is needed

The dog point design ensures that the screw engages with a pre-drilled hole or recess in the mating part, minimizing wear and maintaining accurate positioning. Unlike cone or cup point screws that can mar or deform the surface, the dog point offers a more reusable and non-damaging option.

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