The core of the milling machine reducer is gear meshing, speed reduction, speed reduction and torque increase, and is used in conjunction with the milling machine spindle/feed transmission. 1. Basic principle: The motor has high-speed and low-torque input → multiple sets of gear pairs and large and small gears mesh alternately: the small gear drives the large gear, reducing the speed and amplifying the output torque, matching the low-speed and large torque required for milling machine cutting. Driving pinion gear: few teeth, high speed; driven large gear: large number of teeth, low speed, relying on tooth surface meshing to transmit power. 2. Division of work between two types of reducers for milling machines (1) The spindle speed reducer has a multi-stage sliding gear structure. It switches different gear pairs through the shift fork, changes the transmission ratio, realizes high and low spindle speed switching, and is suitable for different cutting conditions of milling, drilling, and boring. (2) The feed reducer is mostly used for tool feeding on the workbench. After deceleration, it drives the screw and converts the rotational power of the motor into linear feed of the workbench. The deceleration ensures stable feed and sufficient thrust to prevent milling from being stressed and boring. 3. Auxiliary structural principle: the box is sealed and lubricated Read More

For equipment such as bucket elevators and inclined belt conveyors that require loading to stop and reverse, the supporting Flanders reducer will be equipped with a backstop. Once the backstop fails, it will cause the conveyor belt to reverse and slip material, or even cause a major safety accident in which the equipment overturns. When repairing a backstop failure, there are several key points that are easily overlooked. 1. The most common backstop failure is failure and slippage, which cannot prevent the equipment from reversing. In many cases, problems will still occur after replacing a new backstop. In fact, the root cause is that the input shaft or mounting seat is not processed to the correct size. The inner ring of the backstop and the shaft are an interference fit. If the fit gap is too large, the inner ring will rotate with the shaft when the backstop is working, and the outer ring will slip if it does not rotate, and it will not function as a backstop at all. When replacing the backstop, you must measure the size of the shaft. If the shaft is worn and the size is too small, you must first repair the size of the shaft and then install a new backstop, otherwise it will be useless no matter how many times you replace it. 2. Another problem is that the rotation direction is reversed during installation, and the backstop can only be installed in one direction. Read More

The design life of SEW reducers can usually reach more than 10 years, but in actual factory applications, many equipments break down frequently after only three to five years. The reason is often not that the quality of the equipment is poor, but that the daily 'maintenance, maintenance, and inspection' are not done properly. Do the following three things to make the reducer 'extend its life'. 1. Lubricating oil management is the top priority. Lubricating oil is the 'blood' of the reducer. First oil change: After the new machine has been running for 200-500 hours, the first oil change must be performed to remove metal particles produced during the running-in period. Regular replacement: For reducers that work continuously for a long time, it is recommended to replace the oil with new oil every 5,000 hours or once a year. Mixing is strictly prohibited: the same oil as the original brand must be added. Mixing oils of different brands may cause chemical reactions and render the oil ineffective. Oil level control: The oil amount should be controlled at 1/2 to 2/3 of the oil level window. Too much oil will cause increased stirring heat, and too little oil will cause insufficient lubrication. 2. Installation and fastening cannot be careless. Read More

Industrial production scenarios are complex, and harsh environments such as dust, high temperature, humidity, and heavy loads will accelerate equipment wear and tear. Maintenance cycles and projects must be optimized based on general maintenance. 1. Core pain points in dust working conditions (cement plants, coal mines, building materials factories, grinding workshops): Dust can easily enter sealing gaps and mix with lubricating oil, exacerbating the wear of gears and bearings, and blocking heat dissipation channels. Optimization plan: ① Double the cleaning cycle: add surface dust removal once a day, and deep clean the heat sink and breathable cap every week; ② Encrypt oil quality inspection: check the oil quality every 10 days, and change the oil immediately if the oil is found to be dusty; ③ Replace seals in advance: shorten the seal replacement cycle to 3-4 months; ④ Install a dust cover: install a dust-proof device at the shaft end and breathable cap to block dust intrusion. 2. Core pain points in high-temperature working conditions (metallurgy, forging, and drying equipment): high ambient temperature + heating of equipment during operation, resulting in a decrease in lubricating oil viscosity and seals Read More

The key specifications of the core maintenance module of SEW reducer are as follows: 1. Lubrication management (maintenance core, top priority) SEW reducer lubrication is divided into two types: oil immersion lubrication and splash lubrication. Different models correspond to different lubricant brands. ① Oil selection: L-CKC220 and L-CKC320 medium-load industrial gear oils are used for normal working conditions, and high-viscosity and extreme-pressure gear oils are used for high-temperature and heavy-load conditions; ② Oil change specifications: New reducers must change the oil for the first time during the running-in period (200-300 hours); continuously operating equipment needs to change oil every 5000 hours/year; shorten the cycle as needed for severe working conditions; ③ Taboo: It is strictly forbidden to mix gear oils of different brands and grades; the amount of refueling should strictly follow the oil level mark. Too much or too little will cause malfunction. 2. Fastener management: All bolts, pins, and coupling bolts must be tightened with a torque wrench according to standard torque. It is prohibited to tighten bolts by feel; Read More

Misunderstandings in maintenance of SEW reducer seals: oil seals and gaskets are not replaced in a standardized manner, and oil leakage occurs repeatedly. The details are as follows: Misunderstanding 1: The oil seal is damaged and only the oil seal is replaced without checking the status of the journal. Wrong approach: If oil leakage is found at the shaft head, directly remove the old oil seal and install the new oil seal. It may take a few days or a month or two before oil leakage occurs again. Root cause: The long-term friction between the oil seal and the journal will cause scratches, wear, and rust on the surface of the journal. The lip of the new oil seal cannot closely fit the damaged journal, and it will naturally leak again. Correct solution: Before replacing the oil seal, the journal surface must be carefully inspected. Use fine sandpaper to grind and polish minor scratches and rust; for severely worn journals with deep grooves, repair them by spraying or directly replace the shaft body; use a special pressure sleeve when installing the oil seal. Hammering is prohibited. The lip of the oil seal faces the inside of the box, and a small amount of grease is applied to the outside. Misunderstanding 2: Apply sealant at will, too much or too little. Wrong approach: When oil leaks from the joint surface of the box, seal Read More