Measuring the full tooth height h method: When the gear because modulus big, a tooth and other reasons, is not easy to measure the diameter of addendum circle time, measure the tooth to determine the full height h or diameter section modulus. Tooth Full height h available vernier caliper depth stings to measure, the other depth measurement tool also, according to the site conditions may be; if the gear hole may be indirectly determined tooth Full height h spur gear plant, by measuring the hole wall to the addendum and root of the tooth is subtracted from the total height h, modulus or diametral pitch Press equation: m = h / 2f + c Dp = 25.4 * (2f + c) / h long history of human use of spur gears, There are historical records, 400 BC to 200 years ago in ancient China began to use gear, Shanxi, China unearthed bronze gear is the oldest ever found in the gear. Zhang Heng's seismograph, the ancient Indian cotton nuclear reject mechanism (now at the Berlin Museum) contains a gear mechanism. Gear inventor no history to test, and Aristotle can be considered the first systematic discussion of this mechanism person. 300 years BC, the Greek Aristotle "mechanical problems" transmitting rotary motion set forth by bronze or cast iron gear problem. AD 235, China's Ma Jun in its creation guide the gear train car full set of applications. In 1674, Denmark proposed to epicycloids Roemer as tooth profile. In 1765, the Swiss L. Euler recommended for involute tooth profile. 1899 Spur strip, pull the implementation of the program of the first round Shifted Gear. 1923 E. US 怀尔德哈伯 arc tooth profile of gear made in 1955 to the Soviet MA Novikov arc gear-depth study and make it used in production. Luoyang Fuyuan gear Machinery Co., Ltd. is the production of construction machinery, tractors and cars gear, shaft, disc-type parts mainly vertical gear, diversified into other products integrated manufacturing enterprises. With a variety of small, medium and large spur bevel gear and shaft, disk parts thirty thousand sets of annual production capacity. It is mainly with China First Tractor Group, Luoyang Construction Machinery, Luoyang dual Swiss Group, Luoyang locomotive factories and other units supporting the production gear, shaft and disc-type parts. The company's existing slotting machines, gear shaping machines, gear hobbing machine, a variety of grinders, milling machines, broaching machines, presses and other equipment. There are a full range of quality testing equipment gear and equipment. Company organization sound, have experienced production and marketing, warehousing, financial and other management personnel, a senior engineer, senior inspectors, high-ranking operational and technical teams. Straight Gear Factory, Fuyuan gear industry leader, Nanning spur gear provided by Luoyang Fuyuan Machinery Co. Luoyang Fuyuan gear Machinery Co., Ltd. (www.lyfycl.com) is a leader in Luoyang, Henan Province, gear over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Fuyuan gear in leadership with the staff warmly welcome all inquiries negotiations to create a better future Fuyuan gear.