Equipment in industries such as cold chain logistics, low-temperature warehousing, frozen processing and low-temperature detection operates long-term under special working conditions of sub-zero low temperature, alternating temperature difference and dry cold frost. Ordinary industrial bearings perform stably at room temperature, but are prone to two fatal problems in low-temperature scenarios: lubricating grease solidifies and agglomerates at low temperature with zero fluidity, causing sharp increase of starting resistance, start-up jamming and abnormal operation noise; steel materials suffer from cold embrittlement at low temperature with reduced toughness and increased brittleness, resulting in micro cracks and surface peeling under slight vibration and load, and finally leading to premature bearing scrapping.

Most failures of cold chain equipment stem from insufficient low-temperature adaptability of bearings rather than equipment body problems. In low-temperature environments, grease of ordinary bearings thickens and solidifies, failing to form an effective oil film and causing direct dry friction between raceways and steel balls and abnormal wear in a short time. Meanwhile, low-temperature shrinkage sharply reduces the internal clearance of bearings, leading to excessive fitting tightness and rigid rotation, which frequently causes start-up stuttering, equipment startup failure and production line shutdown. Low-temperature embrittlement is an invisible hidden danger. Long-term alternating freezing and thawing temperature accumulates internal stress in bearings, easily causing sudden fracture and failure, bringing great safety risks and operation and maintenance losses to continuous cold chain production and low-temperature warehousing transportation.

Tailor-made for sub-zero low-temperature working conditions, NMT low-temperature freeze-resistant stainless steel bearings break through the low-temperature performance shortcomings of ordinary bearings and complete low-temperature adaptation upgrading from three dimensions: material formula, low-temperature lubrication and clearance structure. Adopting low-temperature embrittlement-resistant stainless steel base material and undergoing ultra-low-temperature cryogenic stabilization treatment, they completely eliminate the low-temperature cold brittleness of the material, maintaining excellent toughness and structural strength in ultra-low sub-zero environments, resisting vibration and impact without cracking and peeling, and eliminating hidden dangers of material failure at low temperature.

Equipped with an exclusive ultra-low-temperature anti-freezing lubrication system for cold chain equipment, different from ordinary room-temperature grease, it has superior low-temperature fluidity and can maintain a flexible liquid state in ultra-low temperature environments from -40℃ to -60℃ without solidification, waxing or adhesion loss. A uniform protective oil film can be formed instantly upon low-temperature startup, completely solving pain points such as high starting resistance, dry friction and abnormal noise during low-temperature start-up. Meanwhile, the exclusive low-temperature clearance is precisely optimized to reserve sufficient margin for low-temperature shrinkage, offset material cold shrinkage deformation, and ensure smooth bearing rotation and reasonable clearance without jamming under low-temperature conditions.

Able to withstand long-term continuous low-temperature operation, frequent cold and heat alternation and frost dry cold environments, NMT freeze-resistant bearings maintain low-resistance, high-smooth and high-stable transmission throughout the process with zero start-up stuttering, zero operation noise and zero material embrittlement, perfectly meeting the all-weather continuous operation needs of various cold chain low-temperature equipment. They greatly reduce the failure rate of low-temperature equipment, extend the service life of bearings in low-temperature working conditions, reduce shutdown and maintenance times of cold chain production lines, and provide stable and reliable low-temperature transmission guarantee for low-temperature intelligent manufacturing, cold chain warehousing and transportation, and frozen processing industries.

Core Advantages

Anti-freezing and non-solidification at low temperature. Exclusive low-temperature grease never agglomerates or waxes in extreme cold, maintaining excellent fluidity for zero-resistance low-temperature start-up.

Material cold brittleness resistance. Cryogenically stabilized stainless steel retains high toughness at low temperature, avoiding embrittlement cracking and surface peeling.

Smooth low-temperature operation without stuttering. Exclusive low-temperature clearance design offsets cold shrinkage deformation to prevent tight clearance jamming and ensure smooth operation.

Fatigue resistance under cold-heat alternation. Adaptable to alternating temperature working conditions with no stress accumulation during freeze-thaw cycles and no performance attenuation in long-term operation.

Long-term low-temperature low wear. The stable low-temperature oil film continuously isolates friction to prevent dry friction damage and greatly extend service life in low-temperature environments.

Applications

Cold chain transmission lines, low-temperature cold storage transmission equipment, frozen food processing machinery, low-temperature laboratory testing instruments, quick-freezing equipment fan modules, low-temperature intelligent sorting equipment, cold chain logistics transfer machinery, sub-zero environment sensing transmission devices, low-temperature medical refrigeration equipment

Manufacturing Technology

Adopting Japanese ultra-low-temperature adaptive manufacturing technology, NMT low-temperature freeze-resistant bearings select special low-temperature embrittlement-resistant stainless steel raw materials, stabilize the material metallographic structure through ultra-low-temperature cryogenic aging treatment and eliminate low-temperature stress. Raceways adopt ultra-precision mirror grinding technology to ensure smooth rotation at low temperature. The cage adapted to low-temperature working conditions will not deform or stiffen in low-temperature environments. Anti-freezing special grease is filled in a low-temperature dust-free closed environment to avoid grease impurities affecting low-temperature performance. Before delivery, products pass continuous ultra-low-temperature freeze-thaw cycle tests, sub-zero extreme start-up tests, low-temperature continuous operation fatigue tests and cold-heat alternation stability tests to fully verify adaptability in extreme cold working conditions.

Product Series

Ultra-low-temperature anti-freezing bearings, special bearings for cold chain equipment, freeze-resistant micro bearings for cold storage, stable low-temperature fan bearings, fatigue-resistant bearings for cold-heat alternation, precision bearings for sub-zero testing instruments, non-standard customized bearings for extreme cold low-temperature working conditions. The full series covers all equipment working conditions of low temperature, extreme cold and alternating freeze-thaw.

Global Service

Focusing on the global low-temperature cold chain transmission supporting field, NMT provides exclusive low-temperature bearing solutions for customers in cold chain logistics, frozen processing, low-temperature scientific research and medical refrigeration industries relying on Japanese ultra-low-temperature material processing technology and extreme cold condition testing standards. We support working condition selection and adaptation for extreme cold environments, customized low-temperature structure design, batch spot supply and transnational low-temperature technical docking, helping enterprises completely solve the problems of jamming, embrittlement and short service life of low-temperature bearings, stabilize the operating rate of low-temperature equipment and reduce long-term operation and maintenance costs.