What is the material of the sleeve and the role of the sleeve Introduction to the role of the sleeve

Sleeves are generally made of steel, cast iron, bronze or brass.

to be made. Some plain bearings.

The "bimetallic structure" can be used to pour bearing alloy materials such as babbitt alloy on the inner wall of steel or cast iron by centrifugal casting, which can not only save valuable non-ferrous metals, but also improve the life of the bearing.

Sliding bearing, a bearing that operates under sliding friction. Plain bearings work smoothly, reliably and noiselessly. Under the condition of liquid lubrication, the sliding surface is separated by the lubricating oil without direct contact, which can also greatly reduce friction loss and surface wear, and the oil film also has a certain vibration absorption ability.

However, the starting friction resistance is large. The part of the shaft that is supported by a bearing is called a journal, and the part that matches the journal is called a bearing. The layer of anti-friction material cast on the inner surface of the bearing in order to improve the frictional properties of the bearing surface is called a bearing lining.

The material of the bearing pad and bearing lining is collectively referred to as the plain bearing material. Plain bearing applications are generally under high-speed and light-load conditions.

Sleeves are generally made of steel, cast iron, bronze, or brass. Some sliding bearings adopt a bimetallic structure, and the bearing alloy materials such as babbitt are poured on the inner wall of steel or cast iron by centrifugal casting, which can not only save valuable non-ferrous metals, but also improve the life of the bearing.

The sleeve is machined from No. 45 steel.

Are you talking about rebar connection sleeves? If so, the rebar connecting sleeve is machined from 45 high-quality carbon structural steel.

1. Resist the inner ring of the bearing, and reduce the unnecessary slippage of the bearing after the sail is tightly prepared, and the bearing will rotate directly on the nail without that thing, the inner ring of the bearing will rotate directly on the nail (it can also be said that the inner ring of the bearing will rotate with the outer ring), so that the local rolling bearing can not be fully operated, so that the speed is reduced.

2. The socket refers to the socket wrench.

The abbreviation is a special tool for tightening or loosening screws. The sleeve is composed of several inner hexagonal sleeves and one or several handles of the upper sleeve, and the inner hexagonal of the sleeve is arranged in sequence according to the model of the bolt, and can be selected according to the need.

Resist the inner ring of the bearing, tighten the nail after the pin collapses and the bearing unnecessary slippage, without that, the inner ring of the bearing will rotate directly on the nail (it can also be said that the inner ring of the bearing will rotate with the outer ring), so that the bearing can not be fully operated, thereby reducing the speed.

A socket refers to a socket wrench.

The abbreviation is a special tool for tightening or loosening screws. The sleeve is composed of several inner hexagonal sleeves and one or several handles of the upper sleeve, and the inner hexagonal of the sleeve is arranged in sequence according to the model of the bolt, and can be selected according to the need.

Bolt sockets are referred to in a variety of different ways, and their uses are different.

1. The adapter of the nut. It is used to convert nuts of different specifications into a uniform size, which is convenient for tightening a large number of nuts of different specifications with one or several tools;

2. Connecting parts of steel bars or bolts;

3. Change the thread specification so that it can be matched with other specifications of thread parts;

4. connecting parts at one end of the bolt;

5. Protect the parts of the exposed part of the bolt.

6. Other parts that are sleeved on bolts and have special functions. Such as the bolt sleeve of an expansion bolt.

1. Socket refers to the abbreviation of socket wrench. A special tool for tightening or loosening screws. It is composed of several inner hexagonal sleeves and one or several upper sleeve handles, and the inner hexagonal sleeves of the sleeve are arranged in sequence according to the model of the bolt, and can be selected according to needs.

A water supply pipe connection fitting, which can be used for the connection of steel pipe and cast iron pipe, etc.

2. Steel bar connection sleeve, a special product used for mechanical connection of steel bar, is divided into cold extrusion sleeve, tapered thread sleeve and straight thread sleeve.

The specifications of the sleeve are, in addition to the positive and negative wire and the reducer sleeve, such as: 25 positive and negative wire, 28 positive and negative wire, 28 25, 28 22 and so on.

Sleeves are divided into tapered thread sleeves, straight thread sleeves, cold extrusion sleeves, upsetting sleeves, split sleeves, grouting sleeves and other types. Straight thread sleeves are further divided into ribbed straight thread sleeves and direct rolling straight thread sleeves.

The specifications of the sleeves of the insensitives are named according to the specifications of the steel bars to which they are connected. Such as the sleeve that connects 25 steel bars is called the sleeve of 25, and the sleeve of connecting 28 steel bars is called 28.

Rebar sleeves are usually produced with precision steel pipes. The precision steel pipes used specifically for the production of rebar sleeves are made of 45 steel, often referred to as "rebar connection sleeves".

Rebar sleeve, also known as rebar joint: a connector used to connect rebar and have an internal thread corresponding to the thread of the wire head.

Classify. There are six types of rebar sleeve connections: (variable diameter type, flaring type will not be introduced here).

1. Standard connection.

The use of possible free rotation cases. Iron rod reasons are used opposite each other opposite the endpoint force of the lock bridge piece. Prefer a standard sleeve or a reducer connecting sleeve.

2. Extended connection.

It is used for occasions where the steel bar is too long and dense, and it is inconvenient to rotate. The connecting sleeve is screwed into the extended thread of a steel bar in advance, and then the end thread of the connected steel bar is reversed, and the connector can be locked by rotating the steel bar for half to one turn, and the standard connecting sleeve can be selected.

3. Locking female connection.

It is used for the steel bar that cannot be rotated at all, such as the mutual docking of bending steel bars and steel cages such as bridges and cast-in-place piles. The lock nut and the connecting sleeve are pre-screwed into the extension thread, and then screwed in another rebar end thread, and the connecting sleeve is locked with the lock nut. Standard or flared connection sleeves are available with locking nuts.

4. Positive and negative thread connection.

It is used for occasions when the steel bar cannot rotate at all and requires the adjustment of the internal force of the steel bar, such as construction joints, post-pouring belts, etc. The connecting sleeve has a positive and negative thread buckle, which can loosen or tighten two steel bars in one screwing direction, and the connecting sleeve with a positive and negative thread buckle should be used first.