What is the value of the M12 M48 anchor bolt after the reduction of the diameter

What is the value of M12-M48 anchor bolt reduction, fastener consultant Yu Wenlong believes that the value table of M12-M48 anchor bolt diameter reduction is unlikely to be provided, all are the company's technical secrets or technical information, it is impossible for you to reach out to someone to give, the best way is to study the standard, people have worked hard for decades of accumulation, you will give it as soon as you open your mouth, it is impossible, it is for you, it is also outdated, incorrect, and the quality is not up to standard if you are not careful. Of course, if you can pay, you can find Yu Wenlong, a fastener consultant, who has a numerical table of M12-M48 anchor bolt diameter.

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Hello, according to the problem description, we first know: bolt hole diameter = bolt diameter + 6mm (m12 m16), 8mm (m20 m24), 10mm (> m24), for example: m16 chemical bolt drilling diameter is 18mm, normal hole depth 135mm.

If other standards subtract the pitch separately, it is the diameter of the threaded bottom hole. The rotor is generally 2mm larger than the nut sizeFor example, a 10mm expansion bolt requires a 12mm drill bit.

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Hello, according to the problem description, we first know: bolt hole diameter = bolt diameter + 6mm (m12 know m16), 8mm (m20 m24), 10mm (> m24), for example: m16 chemical bolt drilling diameter is 18mm, normal hole depth 135mm.

If it is other standards, subtract the pitch separately, which is the diameter of the threaded bottom hole. The selection rotor is generally 2mm larger than the nut sizeFor example, a 10mm expansion bolt requires a 12mm drill bit.

The bolt size of M42, the inner diameter of M42 = when set to a coarse thread) the diameter of the ordinary triangular thread d=m-p*

where m is the major diameter of the thread and p is the pitch.

Bolts are divided into two according to the performance level9. Eight grades, including grades, the bolts above grade (including grades) are made of low-carbon alloy steel or medium-carbon steel and are heat-treated (quenched.

tempering), commonly known as high-strength bolts.

Below grade (excluding grade) is commonly known as ordinary bolts.

Expansion of the slag capital to start the material:Stainless steel bolts are divided into A1-50, A1-70, A1-80, A2-50, A2-70, A2-80, A3-50, A3-70, A3-80, A4-50, A4-70, A4-80, A5-50, A5-70, A5-80, C1-50, C1-70, C1-110, C4-50, C4-70, C3-80, F1-45, F1-60.

The first letter and number represent the group of stainless steel, and the first number represents the tensile strength.

of 1 10.

When measuring the pitch, it is best to print the tip of the thread upside down on the white chalk, which is relatively clear and easy to measure. To measure the metric pitch, you should measure a length, such as 10, 15, 20, mm, etc., count how many teeth are contained, and calculate the pitch in inches to specify the thread specification for the inch thread.

For example: g1"。Metric threads are defined in metric millimeters.

For example: M30.

The bolt size of M42, the inner diameter of M42 = when set to a coarse thread) the diameter of the ordinary triangular thread d=m-p*

where m is the major diameter of the thread and p is the pitch.

I would like to remind friends who ask questions that the bolt of M42 should not be a coarse thread, the coarse pitch is, the fine tooth has it, and the corresponding path can be calculated according to the above formula.

M24 bolt, the diameter of the screw is 24mm, the opposite side of the nut of the outer hexagon is 36mm, and the inner diameter of the inner hexagon is 19mm. This is the national standard.

M42 I.D., Bolt ISO4016 O.D. 78, ISO4762 O.D. 69

The bolt size of M42, the inner diameter of M42 = when set to a coarse thread) the diameter of the ordinary triangular thread d=m-p*

where m is the major diameter of the thread and p is the pitch.

Bolts are divided into8. Quietly start by9. Eight grades, of which the bolt material above grade (including grade) is low-carbon alloy steel or medium-carbon steel and heat-treated (quenching + tempering), commonly known as high-strength bolts, and below grade (excluding grade) is commonly known as ordinary bolts.

Different types of nut grinders implement different national standards, for example, square nut class C implements the national standard GB 39-88;Hexagon nut class C implements the national standard GB T41-2016; Hexagonal thick nuts implement the national standard GB 56-88. But the pitch of the thread specification is the same, the following is the data of the national standard GB T41-2000 hexagon nut grade C:

1. The nut data of M5 M20, the pitch of the nut is in the red box.

2. The nut data of M25 M40, the pitch of the nut is in the red box.

Physical drawing of nut:

The thickness of the M12 nut is:

The thickness of the M16 nut is:

The thickness of the M20 nut is:

The thickness of the M22 nut is:

The thickness of the M24 nut is:

The thickness of the M30 nut is:

According to the national standard (GB), the M12 nut size is as follows:

Specification: M12; Thickness:; Diagonal: 20mm; Opposite side: 18mmThe following figure is a comparison table of nut size under the national standard (GB).

The bolt of M12 means that it has an outer diameter of 12mm.

The actual size is less than 12, and it can also be said that 12 is the nominal diameter.

The actual diameter of the bolt of M12 is between.

m stands for metric thread, for example: m8* means nominal diameter of 8mm, pitch is screw length of 50mm; L is the length of the bolt and D is the nominal diameter.

Specification standard - GB standard.

You didn't say which standard, did you? If it is a coarse tooth, the full thread length is 270mm, if it is not a full thread, the thread length is not necessarily, this mechanical manual has it, the bottom diameter of M12 is.

6g coarse tooth external thread small diameter limit size: maximum, minimum.

M42x4, 5 --- coarse teeth.

There are also five kinds of fine teeth: 4, 3, 2, 1, 5, 1, a total of six.

The pitch of a normal M42 screw is; Use a drill bit to drill the bottom hole.

For those with fine teeth, the pitch is 4, 3, 2, respectively, and the pitch is coarse.

Metric common threads: 4, 3, 2, 4 pitches with a nominal diameter of 42.

Pitch, the axial distance between the corresponding points of two adjacent threads on the thread. You can use the thread rail to measure, or you can press the thread on the paper to leave a trace, and then use a scale to measure and then divide by the number of teeth to get the quotient, which is the pitch of this thread. Standard threads are available in metric and imperial systems, so the pitch of the same M10 thread is not the same.

The pitch in the model airplane and the propeller of the fixed wing refers to the distance that the propeller of the rotor or fixed wing rotates 360 degrees and walks upwards or forward. It's like a screw, the length that can be screwed in after one turn.

The larger the pitch, the greater the distance traveled, and vice versa! However, it is difficult to measure the size of the actual pitch, so the diameter and pitch of the propeller used in fixed aircraft will be marked on the propeller with the same pitch, so as to facilitate the use of suitable engines.