|What is a limit thread gauge?|
The limit thread gauge is a set of GO and NOGO. The GO can pass the thread under test smoothly, and the gauge must stop within 2 rotations (tooth) for this thread to be qualified.
Example: outer diameter 3mm, pitch 0.5mm
|What is a needle gauge?|
Necessary inspection tool for needle gauge to measure precision holes
Needle gauges, also known as plug gauges, bolt gauges, pin gauges, cylindrical gauges, PIN gauges and PIN GAUGE, etc., are gauges designed to check whether products meet standards. They are made of stainless steel, tool steel, ceramics, tungsten steel, and bearing steel. A round rod with a specific size made of high hardness and other materials. It is used to check the position, measure the size of the hole, check the distance between two holes, and can also be used as a stop gauge and measure the depth of the hole. It is a necessary inspection tool for standardized inspection of holes.
The precision specifications of the needle gauge are as shown in (below):
The outer diameter of the needle gauge size ranges from φ0.200 to φ50.00m, and the standard product is below φ20mm, and can be produced to three decimal places. 0.2mm~10.00mm, the accuracy of the general standard pin gauge is ±0.5um, and the accuracy of the ultra-precision type is ±0.3um (applicable to high-precision industries such as optical fiber).
Types and classification of needle gauges
EISEN needle gauge materials are divided into three categories
Our company is the general agent of EISEN, a major Japanese manufacturer, in Taiwan. The needle gauges sold are all made in Japan and imported with original packaging. EISEN is a world-renowned manufacturer of gages such as bolt ring gauges and diamond knives. Few listed and OTC companies are their users.
|What types of metal hardness testers can be subdivided into?|
Hardness testers are roughly divided into metal hardness testers, rubber (plastic) hardness testers, gem hardness testers, cement hardness testers, etc. Generally speaking, most of what we discuss are metal hardness testers and rubber hardness testers.
The types of metal hardness testers can be subdivided into
Rubber (plastic) hardness testers are generally distinguished by English characters, such as A type, D type, C type, F type, etc., which are roughly divided into rubber, plastic, foam, etc., such as Teclock, Kori, etc. There is a Barcol Hardness Tester that can also detect plastics, aluminum products, PE and leather.
Then explain the general purpose of the metal hardness tester:
Common test rulers are HRC, HRB, HRA, HRE and HR15N, HR30N, HR15T, HR30T, etc. In fact, Rockwell hardness testing machine can also measure plastic products whose rulers are HRR, HRL, HRM, such as detecting the hardness of substrates. HRC hardness scales are generally used to detect the hardness of hard metals and heat-treated steels, HRA are generally used to detect the hardness of tungsten steel, and HRB are used to detect the hardness of soft metals or untreated steel. As for HRE, the general inspection is aluminum products. As for HR15N and HR30N, the surface hardness is tested. HR15T and HR30T detect the hardness of thin iron or tinplate.
Micro Hardness Tester/Micro Vickers Hardness Tester (HMV)
The detection range is very wide, ranging from soft metals to hard metals. It can also detect the hardness of coatings, glass and ceramics. The ruler is displayed as HV. There is also a Knoop Hardness Tester (Knoop Hardness Tester), and the ruler is displayed as HK. The use load is 10g to 1kg. As for the Vickers hardness gauge, the ruler is HV, but the load is 1kg to 50kg. At present, many specifications use 10kg to beat the hardness of the material.
Vickers/Vickers Hardness Tester (HV)
It is suitable for measuring thin materials and small metal materials. The measurement range can cover almost all metals. According to the characteristics of the test, the hardness value of the material obtained after the force of the same material is similar, and the test High precision, compared with Rockwell hardness method, it is suitable for hardness testing with a wide range of changes.
Leeb Hardness Tester (HL)
It is widely used in the hardness test of large materials, special structures such as pressure vessels such as elevators and boilers, metal warehouse materials, molds, aerospace, transportation, offshore wind power and other permanent assembly components. It is not only convenient to carry, but also can use different shapes Impactor, to meet different test requirements, and can maintain stable testing in harsh environments.
Brinell hardness tester
The large load force used in the detection, the large diameter of the probe, the large indentation diameter, are suitable for the hardness testing of large-grain metal materials, such as cast iron, forging materials, non-ferrous metals and their alloys, various annealing, quenched and tempered metals, and For steel materials, for softer metals such as pure aluminum, copper, lead, zinc, tin, etc. and their alloys, the test accuracy is stable and accurate.
|How to choose the best hardness test method?|
The hardness test you choose should be determined based on the microstructure (such as uniformity) of the material you are testing, the type of material, the size of the part and its condition.