Cup point grub screws - These grub screws have a cup-shaped indentation on the end, which creates a sharp edge that digs into the surface of the object being secured. This provides a strong grip and helps prevent the screw from slipping or loosening over time. Cup point grub screws are commonly used in applications where a high level of torque is required, such as in machinery or equipment. Point: the end of the screw that’s first driven into the material when a rotational force is applied. Grub screws, also known as set screws, are a type of fixing screw that’s most often used to join one component or part securely to another. Overall, choosing the right type of grub screw for a particular application depends on several factors, including the level of stress or vibration involved, the size and shape of the object being secured, and the level of surface damage that can be tolerated. Consulting with a knowledgeable supplier or engineer can help ensure that the right type of grub screw is chosen for a particular application. A grub screw, also known as a set screw is used for securing sliding or moving components in place. Grubs screws have threaded inserts instead of tapering screw grooves. The screw is passed through a threaded hole in the outer object and then tightened against the inner object to prevent it from moving relative to the outer object. Grub screws are commonly used to secure a pulley or a gear to a shaft or for attaching a handle or cam to a spindle. You can learn more in our comprehensive grub screws guide and our complete set screws guide.

Flat point grub screws - These grub screws have a flat end that provides a larger surface area for gripping the object being secured. Flat point grub screws are ideal for use in applications where a strong grip is required but surface damage must be minimized, such as in delicate machinery or equipment.Roofing screws are available in carbon steel and hardened steel. And, as they are most commonly used for outdoor applications, they have a coating that protects them from the elements and stops rusting. They’re available in gauge sizes ranging from 4 to 6.3mm and lengths ranging from 16 to 120mm.

However, the basic steps to removing a grub screw will be largely similar to those required for removing any other type of threaded fastener: If it won’t budge and needs to be drilled out, start by taking an awl or centre punch and using it with a hammer to make a small indentation in the visible end of the grub screw - this will help reduce the risk of the drill bit from slipping or wandering while you drill through the metal To choose the right size grub screw for your application, it is important to consider the size of the shaft or gear that you are trying to secure, as well as the diameter and length of the threaded hole that the screw will be inserted into. The chart below provides an overview of some common grub screw dimensions: Diameter (mm)Truss or Mushroom Head Phillips slotted or Combination Truss or Mushroom Head Phillips slotted or Combination Cone point grub screws- These grub screws have a pointed end that is shaped like a cone. The cone-shaped point creates a deeper and more secure grip than a cup point, which makes them ideal for use in applications where the object being secured is subject to high levels of vibration or movement. Cone point grub screws are commonly used in applications such as automotive engines, aircraft, and heavy machinery. Knurl point set screws should not be reused because the cutting edges of the knurls are deflected when tightened. During removal, the cutting edges are torn and no longer have full strength to resist unscrewing. ISO standard for Knurled cup point set screw is ISO 4029. Knurled cup point grub screws- These grub screws have a cup-shaped indentation on the end, similar to cup point grub screws. However, the surface of the indentation is knurled, which provides an even stronger grip. Knurled cup point grub screws are commonly used in applications where a high level of torque is required, such as in automotive engines or heavy machinery.

Coach screws: these are driven into materials using a spanner through a square or hexagonal head. They provide robust and heavy-duty fixing. Low Cost - Grub screws are generally less expensive than other types of fasteners, such as bolts or nuts. This can make them a good choice for applications where cost is a consideration. In American English, a set screw is a screw that is used to secure an object, by pressure and/or friction, within or against another object, such as fixing a pulley or gear to a shaft. [1] [2] A set screw is normally used without a nut (which distinguishes it from a bolt), being screwed instead in a threaded hole drilled in only one of the two objects to be secured. A set screw is often headless and threaded along its entire length, so that it will sit entirely inside that hole; in which case it may be called a grub screw or blind screw.

Surface Damage - Grub screws can cause surface damage to the object they are securing if they are not installed correctly. Stainless steel: All DIN, GB Standard and part ASNI standard stainless steel Grub Screws, Example: ISO7380, DIN7981, DIN7982, DIN916, DIN913, DIN7985, DIN912 Masonry screws (also called concrete screws) are self-tapping screws that are perfect for fixing materials directly into stone, masonry, and concrete without needing wall plugs. They have deep, wide threads, ensuring a secure fit once installed. Often used to fix timber, uPVC frames, pipes, and cable housing into masonry. The type of screw heads available for masonry screws include countersunk, double self-countersunk, flange, flat, pan, raised, and wafer. cup point grub screws, which offer much the same function as cone point varieties but can be driven still further to provide even more torque and gripping force When choosing the thread, consider the density of the timber. It’s best to use fine threads for hard timber and coarse threads for soft timber.