Mining crushing, stone rolling, large reducers, metallurgical extrusion and heavy roller pressing equipment operate under extreme heavy-load conditions with long-term instantaneous overload, static high pressure, rolling compression and low-frequency high load. Conventional caged cylindrical roller bearings have limited roller arrangement due to cage space occupation and low load limit, which cannot withstand the extreme pressure of mining heavy industry. Under ultra-heavy load, they are prone to fatal failures such as cage fracture, roller collapse, raceway indentation, overall collapse and bearing locking, resulting in crusher shutdown, production line paralysis and high maintenance costs, which are the most troublesome accessory problems for extreme heavy-load equipment.

Aiming at the pain points of extreme heavy load, static pressure bearing and rolling impact working conditions, Japan NMT independently develops and manufactures full-complement cage-free cylindrical roller bearings. Canceling the traditional cage structure, the internal space is fully utilized for roller arrangement to maximize roller quantity, contact area and load density, completely breaking the load bottleneck of conventional bearings. Adopting Japanese heavy-duty forging technology and ultra-high-strength steel, it creates high-density, high-rigidity, compression-resistant and overload-resistant core parts, providing long-term and stable pressure-bearing transmission guarantee for various ultra-high-load, low-speed heavy-duty and extrusion-type heavy industrial equipment.

Core Product Advantages

1. Full-complement roller design doubles load capacity: The cage-free structure enables dense internal roller arrangement, greatly increasing the effective contact area. The ultimate radial load capacity far exceeds that of ordinary caged bearings, easily coping with ultra-heavy load of mining and crushing equipment.

2. Solid overall structure with excellent compression resistance: Without weak cage components, the whole bearing consists of high-strength rollers and solid inner and outer rings, eliminating the risk of cage fracture and outstanding in compression resistance and collapse resistance, suitable for long-term static high-pressure working conditions.

3. Strong overload resistance and impact pressure tolerance: The mechanical structure is optimized for instantaneous overload and material rolling impact of crushers, with uniform load distribution, low risk of local collapse and raceway depression, and high overload fault tolerance.

4. Extreme rigidity and ultra-low deformation: Supported by high-density rollers, the overall rigidity is maximized with minimal shaft offset and elastic deformation under heavy load, ensuring stable equipment operation, consistent crushing accuracy and no transmission looseness.

5. Targeted for low-speed heavy-load working conditions: Designed specifically for low-speed, high-load, continuous pressure and reciprocating extrusion conditions, focusing on heavy-load durability rather than invalid high-speed redundancy, with service life far exceeding conventional bearings in harsh heavy-duty environments.

Application Scenarios

Mining jaw crushers, cone crushers, impact crushers, large stone rolling equipment, heavy industrial reducers, metallurgical rolling mills, building material extrusion equipment, heavy-load conveying roller tables, port heavy-duty handling machinery, low-speed heavy-load industrial transmission equipment.

Precision Quality Assurance

NMT full-complement cylindrical roller bearings are strictly manufactured in accordance with Japanese extreme heavy-load bearing standards. Adopting heavy-duty special ultra-high-strength refined bearing steel, they undergo ten-thousand-ton forging densification, multiple tempering hardening, deep carburizing strengthening, raceway mirror superfinishing and heavy-load pairing precision calibration. All products pass extreme static pressure test, ultra-load rolling test, repeated impact durability test and long-term heavy-load fatigue test, featuring dense structure, ultra-high strength and no deformation under pressure, serving as the preferred replacement for extreme heavy-load industrial scenarios.

Product Range

Cage-free full-complement cylindrical roller bearings, ultra-heavy load crusher special bearings, low-speed heavy-load full-complement roller bearings, mining and metallurgy pressure-bearing bearings, heavy-duty reducer matching full-complement bearings, high-density full-roller heavy-load bearings, customized ultra-heavy load non-standard bearings.

Brand Strength

Japan NMT deeply cultivates the field of extreme heavy industrial load. Solving the industry pain points of insufficient load capacity, easy damage and short service life of conventional bearings, it continuously iterates full-complement heavy-load series bearings. With ultra-high structural strength, extreme load-bearing performance and long-term heavy-duty durability, NMT empowers cost reduction and efficiency improvement for global mining, metallurgy and building material heavy enterprises, and strengthens the core transmission barrier of heavy industrial equipment.