Set screws and grub screws are
two different types of screwdrivers. Unlike the standard projecting screw head,
set screws lack a threadless shank below the head. Instead, the "head-end"
of a set screw is a recessed internal depression. Unlike set screws, a hex or
star socket can seat a headless grub screw. Set screws may also be seated in
standard slotted drives.
Socket-Head Drive Designs
Socket-head drive designs for a
variety of screws have been around for over a century. They are the most common
type of drive, with the socket-head being the safest type due to its ability to
transmit maximum torque. Both types of drive are compatible with many different
types of tools. There are many different tip types for grub screws, including
common Cup Points and Torx heads. To suit your specific application, bespoke
manufacturing is available.
Socket-head drive designs for a
variety of Grub Screws & Set Screw types are available. Set screws, or grub
screws, are commonly used for fine adjustment and permanent positioning of
parts. Their hex fitting head does not have a threadless shank underneath it,
and instead features a recessed internal depression that serves as the
"head-end". Socket-head drive designs for grub screws and set screws
are designed for standard slotted or hex-head driver sets.
Point Types
Set screws and Grub screw points
are similar in appearance. Both types of fasteners are used to clamp or join
objects. They are used in a variety of scenarios where a traditional nut and
bolt combination would be inconvenient or inadvisable. For example, grub screws
are often used as indoor handles to attach them to the spindle. Unlike bolts,
which are made with heads, grub screws have no protruding edges.
One of the most common grub screw
point types is a cup or cone point. This point features a flat, extended
perimeter to guide the screw into the pre-drilled location hole. These types of
grub screws are used to secure rotating parts, such as shafts and gears. They
are also used to achieve fine adjustments. However, their flat, pointed ends
limit their use in automotive applications.
Sizes
There are several different sizes
of grub screws and set screw types available for your fixing requirements. Both
types are versatile, highly adaptable, and have the benefit of greater
corrosion resistance than a bolt or nut. Listed below are some of the most
common sizes and types of grub screws and set screws. They are used for a
variety of applications, from small repairs to large-scale projects.
A standard set screw size is
based on the screw diameter. The diameter should be equal to one-half the shaft
diameter. If you are unsure about the screw size, contact the manufacturer for
the proper screw data. Common materials for set screws include stainless steel,
brass, and alloy steel. Plastic set screws are also widely available. While a
set screw's diameter can vary widely, its diameter should match the diameter of
the shaft to be effective.
Common Uses
Grubbers, also known as a socket,
or set screws, are used to join two objects with a tight torque. Developed over
a century ago, grub screws were the first screw to eliminate the need for a
screwhead, thus reducing the chance of accidents. They are generally headless
and can be seated using an Allen key or a screwdriver with a hexagonal insert
bit. Grub screws have several different point types, which are important to
know when putting them together.
Often used to attach two pieces
of metal, grub screws have a flat point that bites into the surface of the
second object when fully screwed in. Set screws can also have a slotted head,
recessed drive, hex or square head, or crosshead shape. These are commonly used
for fastening screws to metal and plastics. When used in this way, they are
incredibly versatile.
A small headless screw that is slotted at one end to receive a screwdriver and when placed in a continuous threaded hole between two adjacent pieces prevents lateral movement.
— Joddie Marshall (@joddie_marshall) May 16, 2022
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Reusability
In addition to being a popular
tool in industrial settings, Grub Screws & Set Screws play an important
role in the mechanics and engineering fields. They are used to attach door
handles and knobs to spindle shafts. To attach a door handle or knob to a
spindle, the grub screw thread extends into a square locator recess on the
spindle and then is driven into the tapped hole. The screw is fully driven into
the hole and the grub head projects through the hole. As a result, the spindle
is moved to the proper position on the door handle.
Set screws and grubs are often used together, as they provide a more secure connection. Unlike a traditional bolt, a grub screw doesn't have a projecting head and threads into the surface, rather the head is recessed into the hole. Depending on the application, a grub screw or set screw may be seated into a standard slotted drive or hex socket.
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