Core grain and oil processing equipment including screw oil presses, rice mills, flour mills, grain cleaning screens, bucket elevators, polishers and shellers operate under harsh working conditions: continuous alternating extrusion loads, floating large quantities of grain dust, bran and rice husk debris, relatively high workshop humidity, pervasive oil volatiles, uninterrupted all-weather processing and dust agglomeration after contacting moisture. Grain and oil production lines demand high continuity. Once bearing failure causes shutdown, materials trapped inside equipment tend to agglomerate and deteriorate. Cleaning takes a long time, leading to grain raw material loss and delayed order delivery. Ordinary cylindrical roller bearings cannot adapt to dusty and humid environments in grain and oil processing plants, becoming a common operational pain point. Screws of screw oil presses bear continuous huge extrusion loads, and rollers of rice and flour milling equipment are under long-term cyclic stress. Ordinary bearings lack sufficient fatigue resistance and tend to form raceway indentation and surface peeling after long-term operation, aggravating equipment vibration and reducing sorting precision of processed materials. Fine flour, rice bran, bran and oil powder are continuously generated during production. Light dust drifts easily. Simple seals cannot block tiny grain dust from penetrating into bearings. Dust mixes with grease and forms abrasive medium that accelerates raceway wear. Humidity rises in workshops during damp seasons, causing dust to clump, blocking lubrication passages and enabling water vapor to emulsify and degrade grease. High temperature and volatile oil media exist in oil pressing areas, which easily age seals. Ingress of impurities also brings risks of grease contaminating grains. Procedures for cleaning grain inside equipment and replacing bearings are complicated. Frequent shutdown maintenance directly cuts output and raises operation costs.

Focusing on transmission supporting field for grain and oil processing equipment, Japan NMT specially develops heavy-duty grain-dust & moisture resistant wear-resistant long-life cylindrical roller bearings dedicated for grain and oil machinery to solve industry pain points of ordinary grain & oil bearings such as easy ingress of grain dust, tendency to rust and grease emulsification in humid environments, susceptibility to fatigue under continuous extrusion loads, seal erosion by oil volatiles and short service life. Through five core upgrades including high-toughness wear-resistant alloy steel matrix, multi-layer labyrinth dust-proof moisture-resistant composite sealing, low-adhesion super-finishing technology for raceways, moisture-resistant dust-proof long-life lubrication and extrusion alternating load stress equalization optimization, it fully adapts to heavy-load, grain-dust and humid working conditions of oil pressing, rice milling and flour milling equipment. It fundamentally solves problems including abrasive wear by dust, grease emulsification and bearing jamming, stabilizes operating precision of rollers and screws, avoids grain contamination risks, and guarantees long-term continuous stable production of grain and oil processing lines.

Core Product Advantages

1. High-toughness wear-resistant alloy steel matrix withstands continuous extrusion heavy loads: Adopting refined bearing alloy steel specially for grain & oil extrusion processing equipment with multiple quenching & tempering strengthening heat treatments to balance toughness and wear resistance. It bears long-term continuous alternating extrusion loads of oil press screws and milling roller systems, effectively restrains raceway plastic deformation, fatigue pitting and surface peeling.

2. Multi-layer labyrinth dust-proof moisture-resistant composite sealing blocks ingress of grain dust, bran and water vapor: Equipped with exclusive multi-layer labyrinth and anti-winding wear lip sealing system for grain & oil working conditions. It effectively intercepts flour, rice bran, bran and fine oil powder, prevents workshop water vapor from penetrating into bearing cavities, avoids dust clumping and blocking lubrication passages, inhibits grease emulsification caused by water absorption, reduces seal erosion by oil volatiles, and eliminates risks of lubricant leakage contaminating grain raw materials.

3. Low-adhesion super-finishing technology for raceways reduces dust accumulation: Micron-level super-finishing grinding is applied on raceways and rolling elements to lower surface adsorption capacity, reduce adhesion and accumulation of light grain dust, slow dirt formation, maintain smooth long-term bearing rotation and lower risks of jamming failure.

4. Moisture-resistant dust-proof long-life lubrication system adapts to workshop temperature & humidity fluctuation: Custom lubrication formula developed for humid and dusty grain & oil processing conditions features excellent hydrolysis resistance and anti-dust pollution performance. It is not easily deteriorated by grain dust impurities and maintains stable performance under varying temperature and humidity, continuously forming stable protective oil film and extending lubrication maintenance intervals.

5. Optimized structure for alternating extrusion loads evenly disperses vibration stress: Optimizing roller arrangement and internal clearance parameters to improve load distribution during continuous operation of screws and milling rollers, relieve local stress concentration caused by periodic vibration, slow precision attenuation from long-term continuous operation, stabilize smooth equipment operation and improve finished quality of grain products.

Application Scenarios

Screw oil presses, rice mills, flour mills, grain polishers, shellers, vibrating cleaning screens, bucket elevators, auxiliary oil leaching equipment, roll shaft and screw supporting transmission parts of complete rice, wheat, peanut and rapeseed grain & oil processing lines.

Precision Quality Assurance

NMT heavy-duty cylindrical roller bearings for grain and oil processing machinery are manufactured strictly in accordance with Japanese food processing equipment manufacturing standards. Selected special bearing steel with high toughness, wear resistance, dust and moisture resistance undergoes continuous extrusion durability test, grain dust sealing test, hot-humid cycle aging test, long-term vibration fatigue test and lubricant leakage prevention test. The products feature stable load capacity, outstanding dust & moisture resistance and reliable anti-leakage sealing, fully adapting to 24-hour continuous processing conditions with pervasive light grain dust and humid environment in grain and oil processing plants.

Product Range

Heavy-duty cylindrical roller bearings for screw oil presses, low-vibration long-life bearings for rice polishing machines, dust-proof wear-resistant bearings for flour mills, moisture-resistant bearings for grain cleaning and elevating equipment, stable supporting bearings for oil seed shellers, customized non-standard heavy-load bearings for complete grain & oil production lines.

Brand Strength

Japan NMT focuses on R&D and manufacturing of bearings for heavy grain & oil processing under working conditions of continuous extrusion loads, light grain dust, hot-humid workshop environment and erosion by volatile oil media, specializing in performance optimization under scenarios of grain dust adhesion & blockage, humid emulsification rust and long-term alternating extrusion loads. With Japanese wear-resistant steel heat treatment technology, exclusive dust-proof moisture-proof anti-leakage sealing technology for grain & oil equipment and strict hot-humid dusty working condition simulation testing system, it accurately solves industry problems of grain & oil bearings such as abrasive wear failure caused by grain dust, water vapor rust, grease emulsification, raw material contamination via seal leakage and frequent maintenance replacement, supplying high-load, dust & moisture resistant, safe long-life core transmission components for global flour, rice and vegetable oil processing industries.