Types and uses of wrenches

A wrench is a common hand tool. What kinds of wrenches are there? Common wrenches include fixed wrenches, box wrenches, adjustable wrenches, dual-purpose wrenches, box wrenches, and so on. All kinds of wrench specifications, model size, use methods, precautions are different.

A wrench is a hand tool that uses the lever principle to turn bolts, screws, nuts, and other threads to tighten the opening or casing firmware of a bolt or nut. A wrench is usually made of a clamp at one or both ends of the handle with an external force applied by the handle to turn the bolt or nut by holding the opening or casing of the bolt or nut.

 

 

 ​​

Features: One or both ends are provided with fixed size openings for turning nuts or bolts of fixed size.
Function: General tool, assembly machine tools or spare parts and transportation, agricultural machinery maintenance necessary hand tools.
Size: 4x5, 5.5x7, 8x10, 9x11, 12x14, 13x15, 14x17, etc. (in MM)
Use: It can be used up and down or inserted directly.

The wrench can be divided into double end wrench, single end wrench, knock wrench, high neck wrench, dual-purpose wrench,

 

1. Double end spanner
Double end spanner is a general tool, is the assembly of machine tools or spare parts and transportation, agricultural machinery maintenance necessary hand tools.
Double end wrench manufacturing materials - generally choose high quality carbon steel forging, through the overall heat treatment processing. Products must pass quality inspection and verification, avoid use in the process
Personal injury caused by product quality problems.
The type and specification of the double-ended fixed wrench (in MM) :
4x5, 5.5x7, 8x10, 9x11, 12x14, 13x15,14x17, 17x19, 19x22, 22x24, 30x32, 32x36, 41x46, 50x55,
65 times 75.

 

2. Single end spanner

Large industrial single head spanner is suitable for petroleum, chemical industry, metallurgy, power generation, oil refining, shipbuilding, petrochemical, machinery and other industries, is the installation of equipment, equipment and equipment inspection

Necessary tools for repair and maintenance work.

Single end spanner can be divided into metric system and British system. The difference between the metric system and the British system is that the metric system is measured in meters, centimeters, millimeters, etc., while the British system is measured in inches or feet, etc

A unit of measurement. The relationship between the British and metric systems is 1 inch = 25.4 mm, mainly for thread standards.

The manufacturing material of single end spanner is usually 45 medium carbon steel or 40Cr alloy steel.

Manufacturing standard for single end fixed wrenches: GB/T4392-1995 (percussion fixed wrenches and single end fixed wrenches).

Features of single end spanner: Single end spanner is forged from high quality medium carbon steel or high quality alloy steel. It has reasonable design, stable structure, high material density and anti-beating

Strong ability, no folding, continuous, no bending, high precision product size, durable and so on.

 

3. Knock the stupid wrench
Knock the wrench is suitable for petroleum, chemical, metallurgy, power generation, oil refining, shipbuilding, petrochemical and other industries, is the equipment installation, equipment and equipment repair, maintenance work is necessary
Tools.
Percussion wrench is divided into metric and British two kinds, generally using 45 medium carbon steel or 40Cr alloy steel overall forging processing.
Manufacturing standard for percussion wrench: GB/ T4392-1995
Percussion wrench is the most common type of percussion wrench. The end of the product is the percussion end, and the other end has a fixed size opening for turning a nut or bolt of one size.

 

4. Lead the wrench
High neck wrench is generally made of tool steel or 40Cr alloy steel.
It is mainly suitable for the occasion where the working space is narrow and the common wrench cannot be used. Small Angle, can be used where there is only a small swing Angle (only need to turn 1/2 the Angle of the hand),
And in the joint surface is large, can be used for strong tightening.

 

5. Double wrench
Large-scale industrial dual-purpose wrench is mainly used in petroleum, chemical industry, metallurgy, power generation, oil refining, shipbuilding, petrochemical and other industries, equipment installation, equipment maintenance, maintenance
Two tools are necessary for repair work.
Dual-purpose wrenches are available in metric and English systems.
The material of dual-purpose wrench is mainly made of 45 medium carbon steel or 40Cr alloy steel.
Manufacturing standard for dual-purpose wrenches: GB/T4392-1995 (percussion wrench and percussion box wrench).
The dual-purpose wrench is forged from high quality medium carbon steel or alloy steel, which is easy to use.

 

Special: Both ends with hexagonal holes or twelve corner holes of the working end, suitable for small working space, can not use the ordinary wrench occasions.
Can: The plum end is usually used as the initial release and final locking of the screw (cap).
Second Lieutenant: 8*10, 10*12, 12*14, 14*17, 16*18, 17*19 (in MM).
Use: With the left hand, push the joint between the wrench and the bolt, keep the box wrench and the bolt completely fit, and with the right hand, hold the other end of the wrench and apply force.

 

Features :- The end is the same as the single end of the fixed wrench, the other end is the same as the box wrench, and the bolts or nuts of the same specification are twisted at both ends.
Functions: Equipment installation, installation, equipment maintenance, large industrial petroleum, chemical, metallurgical power generation, oil refining and other industries.
When :4".6".8 ", 10", 12", 15", 18", 24", etc.
Use: When using, adjust the wrench mouth to a little larger than the nut, shake the handle with the right hand, and then rotate the worm gear with the right hand to tighten the nut.

 

Features: called adjustable wrench, period width can be adjusted within a certain range, is used to tighten and loosen different specifications of nuts and bolts - a kind of tool.
Function: to rotate hexagon or square head bolts, screws, nuts.
Dimensions :4", 6", 8", 10", corresponding opening 1.3, 1.93, 2.4, 3 cm.
Use: The wrench is not easy to open, should make the tension action on the thicker side after opening, in order to prevent the opening "eight" shape.

 

Special: Also known as crescent wrench, used to turn the thickness of the limited flat nuts.
Function; Twist flat nuts with limited thickness, etc.; Special for disassembling and assembling round nuts on vehicle machinery equipment.
Pay :22-26, 28-32, 34-36, 45-52, etc.
Use: Adjust to the torque value you need on the wrench, lock the bolt with the wrench, and release the bolt as soon as the torque value is reached.

 

Features: A wrench composed of a plurality of sleeves with six holes or twelve corner holes and equipped with a handle, connecting rod and other accessories.
Function: Suitable for turning the position is very narrow or concave very deep bolt or nut.
Size: Large, medium and three types, common 6.3mm series, 10mm series and 12.5mm series.
Use: Put the sleeve on the square tenon of the matching handle. Hold the joint of the handle and the sleeve tightly with your left hand. Do not shake, lest the sleeve slip out or damage the corners of the bolts and nuts. Can be connected to the connecting rod lengthening use, increase the torque.

 

Features: L - shaped hexagon bar wrench, specially used for turning hexagon screws.
Can: Specially used for fastening or disassembling round nuts on machine tools, vehicles and mechanical equipment.
Size: Height 10mm~70mm; Length 32mm~175mm; Hexagonal opposite side 0.7mm~19mm.
Use: Place the six-edge wrench in the inner hexagonal slot of the screw. Tighten the screws clockwise. Loosen the screws counterclockwise.

 

Features: Also known as torque wrench, torque wrench, torque adjustable wrench, can set torque, and torque adjustable
Function: Fastening bolts, the initial tightening and final tightening of large hexagonal high-strength bolts need to use torque wrench
Size: 1-5N,525N, 10.5ON, 20, 40200N,70-350N.
Use: first plum wrench square cotton connection technology good auxiliary accessories, ensure the connection, before strengthening the torque, set the force value to be reinforced. And lock the fruit lock device, adjust the direction change button to the direction of the afterforce.

 

Pipe wrench
Features: Its shape is like an adjustable wrench, but the two claws have teeth to increase the grip force, and the front jaw is an active claw, by adjusting the nuts to adjust the size of the opening.
Function: Used to clamp rotating steel pipe or other round working objects.
Size: Specification 8"~-48"; The total length ranges from 200mm to 1200mm.
Use: should first check whether the fixed pin is firm, clamp force into the torque, with the dirty twist direction of the greater force will be able to clamp the pipe tighter.