Bolt types and applications
A bolt is a type of mechanical fastener with threaded shafts. This fastener is often inserted between two objects with aligned holes.
After the bolt is insert through the parts, which all have unshield holes, a nut is put onto it to create a clamping force and stop axial motion. The threads of a screw are attach with cables in one segment after passing through the first piece with an evacuation hole.
The bolts are categorise by strength using two integers separate by points.
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Description
Bolts are use to secure and join items through their aligned unthread holes, typically with a matching nut. The majority of a bolt is made up of the shaft and head. The thread and unthread sections of the bolt shaft are refer to as the shank and bolt thread, respectively. Nuts and washers are occasionally use with bolts as well.
Different components of a bolt
Head
The head is the topmost part of the bolt head when it is seen above the workpiece or component. Different sizes and shapes of heads are possible. The bolt’s radius or diameter influences the size of the head. The nut and the head are identical in size and shape from the outside.
Grip length
The grip length of a bolt is the length of the bolt below the threadless head. The thickness of the workpiece in the clamp is greater than the length of the grip.
Thread length
The length below the grip length that is thread is called the thread length. This is the length, including the spinning nut.
Nominal length
The bolt’s nominal length is its whole length, omitting the height of the head.
Screw
The bolt and nut are two distinct parts. If there is no nut, the bolt is refer to as a screw. To tighten the assembly and establish a strong link, a nut is use.
Radius
The radius of a bolt is its radius along the length of the bolt. When working with bolts, having this measurement on hand is essential.
Various types of bolts
Anchor screws
Anchor bolts secure components to concrete surfaces. They frequently work in the construction industry. Anchor bolts frequently live in the bases of steel poles. They are also use to attach façade systems to walls made of reinforce concrete.
Without using wet concrete, anchor bolts are insert via drilling. They are drop directly into an expansive pit line with harden concrete.
Blind bolts
Blind bolts are ideal when there is restrict access to one of the sides of the secured goods. To spin the nut on the visible side, rotate the fitting bolt while using a wrench. This procedure produces a robust joint that may be finish quickly.
Carriage bolts
They have a shallow dome head and a flat tip. There is some threading on the bolt shaft. A square neck is present under the head of the bolt to prevent the bolt from spinning while the nut is tighten. They are typically use to put together metal and wooden parts. They are use in frames, patios, decks, and furniture.
Elevators bolts
Elevator bolts’ rounded, flat and thin heads fit well with the connection surface and evenly distribute the load across a larger area. The bolt shaft has coarse, incompletely threaded threads.
A square neck beneath their heads prevents the bolt from turning as the nut is tighten or loosen.
The ideal option is lift bolts because they don’t interfere with the operation of pulleys, conveying systems or lifts.
Eye bolts
Eye bolts feature a thread on the end that is straight and a completely or partially looped shank. To boost bending resistance, a square or round neck may be position in between the loop and the rope. The looped shank can raise weights up to a certain point.
A few different types of eye bolts can serve as a point of attachment for tasks including lifting, hoisting, tugging, and rigging. In order to lessen workplace hazards, you can also use them to organise and route supplies like cables, wires, hoses, and ropes.
Hanger bolts
The opposite ends of headless bolts, also referred to as hanger bolts, have machine bolt and lag screw threads. They function flawlessly to combine wood and metal objects. Since the lag screw thread has a pointed tip, they can use a tap to make holes in the wooden portion.
The machine bolt thread is receive in predrilled holes on a machine. To complete the setup, a nut is position and screw onto the machine bolt thread.
Lag bolts
Lag bolts or lag screws are technically screw fasteners because they do not require a nut. Unlike other bolts with blunt ends, they have a point end that enables them to create a thread hole as they are spun on their heads. The heads of lag bolts are frequently square or hexagonal. They are typically use to secure wood components.
J-bolts
J-bolts are without a bolt head, yet they can accept nuts on their threaded end. They frequently work in the construction industry. As anchor bolts, you can bend the cast in a concrete slab. They are involve in wall-to-concrete attachments and roofing.
Hex screws
Hex bolts can be identify by their forge hexagonal heads, which can be easily grab and rotated with a wrench. They are widely employ to fasten machine and structural components. They are effective for joining wooden and metal components.
machine screws
Hex or square heads on machine bolts are frequently secured with a wrench or socket. They are not fit with a washer and neither do they have chamfer or round ends.
Machine screws are typically use to fasten metal to wood and metal to metal. They can also be use to fasten wood goods. Compared to lag bolts, they are more stiff and have a higher load capacity, but they also require access to all sides of the material.
Uses of bolts
Bolts are applicable in the situations indicate below.
- when it’s necessary to constantly disassembly and reassemble the fixed components
- The fasteners are made of brittle materials that cannot accommodate strong threads
- When fastening components, such as plates, flanges, beams, etc., have a medium thickness.
- If a space is available for the bolt head and nut
- when there is room for a spanner
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