Single-screw extruders, twin-screw compounding extruders, plastic granulators, film extrusion equipment, pipe and profile extrusion production lines, waste plastic recycling granulation machinery and other plastic processing equipment operate under strict working conditions of continuous axial screw thrust, high-temperature barrel thermal radiation, diffuse fine plastic dust, alternating impact load and all-weather non-stop extrusion production. Plastic extrusion production lines belong to continuous light chemical industry equipment. Once bearing failure causes shutdown, molten plastic inside the barrel will easily cool and solidify, leading to lengthy cleaning work, massive raw material scrap and output loss. Ordinary cylindrical roller bearings cannot adapt to the harsh conditions of extrusion equipment, and frequent failures restrict production. Continuous screw rotation generates huge combined axial and radial loads. Ordinary bearings have insufficient structural strength and are prone to raceway indentation and roller fatigue damage under long-term compression, resulting in screw vibration, uneven discharge and inconsistent thickness of profiles. The extruder barrel continuously radiates high heat and conducts heat to bearing positions. Conventional bearings have limited heat resistance, and long-term heating accelerates grease carbonization and drying, triggering excessive bearing temperature rise, abnormal noise and locking shutdown. Fine resin dust generated during plastic crushing and feeding cannot be effectively blocked by simple seals. Dust mixes with grease to form abrasive paste and accelerates raceway wear with continuous expansion of bearing clearance. Equipment start-stop and raw material fluctuations bring alternating impact loads. Traditional bearings have poor fatigue resistance and fast precision attenuation, requiring frequent shutdown, disassembly and bearing replacement as well as cleaning solidified raw materials, greatly increasing operation and maintenance costs for plastic processors, becoming a widespread equipment pain point in the plastic extrusion industry.

Focusing on precision transmission for plastic extrusion equipment, Japan NMT specially develops heavy-duty high-temperature long-life cylindrical roller bearings dedicated for plastic extrusion machinery to solve industry pain points of common extruder bearings including insufficient load capacity, easy carbonization under high temperature, easy dust ingress, rapid fatigue wear and heavy shutdown losses. Through five core upgrades: heavy-duty reinforced alloy steel base material, high-temperature composite sealing, anti-carbonization long-life lubrication system, axial load optimized structure and continuous-operation fatigue-resistant heat treatment, it fully adapts to high-temperature heavy-duty continuous working conditions of twin-screw extruders and granulation recycling equipment. It fundamentally solves problems including bearing overheating locking, dust abrasive wear, screw vibration and rapid precision attenuation, providing stable and reliable core transmission support for automatic plastic extrusion production lines.

Core Product Advantages

1. Heavy-duty reinforced alloy base material withstands combined loads: Adopting high-purity alloy steel specially for extrusion equipment with deep quenching and tempering heat treatment to improve compression toughness. It can withstand long-term combined radial and axial thrust generated by screw rotation, effectively suppress raceway indentation and roller fatigue damage and maintain stable screw operation.

2. High-temperature composite sealing blocks dust and heat transfer: Equipped with multi-layer high-temperature resistant composite sealing structure, it prevents fine plastic dust from entering the bearing cavity and slows heat conduction from the barrel to reduce bearing operating temperature rise and avoid abrasive wear caused by dust accumulation.

3. Anti-carbonization high-temperature lubrication system maintains stable oil film: Matched with exclusive lubrication solution for extrusion high-temperature conditions, it resists coking, carbonization and drying under high temperature. A complete protective oil film can be maintained during long continuous operation to eliminate dry friction overheating and extend lubrication replacement cycles.

4. Load optimized structure buffers alternating impact: Optimizing roller arrangement and stress distribution to evenly disperse alternating impact loads caused by screw start-stop and raw material fluctuations, reduce local stress concentration and slow precision attenuation during long-term cyclic operation.

5. Fatigue-resistant precision raceway retains long-term operating accuracy: Adopting ultra-precision mirror raceway grinding technology for smooth and uniform contact surfaces and lower friction loss. Clearance looseness rarely occurs during long continuous extrusion to stabilize discharge uniformity and guarantee consistent quality of pipes, films and modified pellets.

Application Scenarios

Twin-screw compounding extruders, single-screw extruders, plastic granulators, film extrusion production lines, pipe and profile extrusion equipment, waste plastic recycling granulation machinery, masterbatch mixing and extrusion equipment.

Precision Quality Assurance

NMT heavy-duty cylindrical roller bearings for plastic extrusion are manufactured strictly in accordance with Japanese light chemical machinery manufacturing standards. Selected special high-temperature and heavy-load bearing steel undergoes combined load durability test, high-temperature continuous temperature rise test, dust sealing durability test, alternating impact fatigue test and long-term precision stability inspection. The products feature excellent load capacity, high-temperature and carbonization resistance, dust and wear resistance and lasting precision retention, fully adapting to the high-temperature, heavy-load, 24-hour continuous production working conditions of plastic extrusion equipment.

Product Range

Heavy-duty cylindrical roller bearings for extruders, high-temperature bearings for twin-screw equipment, dust-proof wear-resistant bearings for granulators, long-life fatigue-resistant bearings for plastic machinery, transmission bearings for recycled plastic equipment, customized non-standard heavy-duty bearings for extrusion equipment.

Brand Strength

Japan NMT focuses on the R&D and manufacturing of bearings for light industry plastic, chemical extrusion and continuous high-temperature heavy-duty working conditions, specializing in performance optimization under environments of high-temperature radiation, combined axial loads and fine dust. With Japanese precision heat treatment technology, exclusive sealing technology for extrusion working conditions and complete machine working condition simulation testing system, it accurately solves industry problems of extruder bearings such as high-temperature carbonization, dust wear, screw vibration and frequent shutdown replacement, supplying high-load, high-temperature resistant and long-life core transmission components for the global plastic modification, plastic extrusion and recycled resource processing industries.