MF72 Flanged Bearing | Open / ZZ / 2RS | Enhanced Load Miniature Flange Bearing

MF72 flanged bearing, MF72 open miniature bearing, MF72ZZ shielded bearing, MF72 2RS sealed bearing, 2x7x2.5mm miniature flange bearing, high load tiny flanged bearing for micro automation

Product Overview

The MF72 flanged deep groove ball bearing is an upgraded high-load model in the mainstream MF miniature bearing series, iterated from MF62 with expanded outer diameter and optimized internal ball structure. It retains the ultra-compact miniature installation size while greatly improving bearing capacity and structural stability, solving the load insufficiency problem of smaller MF-series bearings in long-cycle micro-operation scenarios. Adopting an integral outer-ring flange design, this bearing realizes precise one-step axial positioning without additional fixing accessories, lowering assembly difficulty and improving the overall structural compactness of miniature precision equipment.

Available in three professional sealing versions to match diverse operating environments: MF72 open type for high-speed clean scenarios, MF72ZZ metal shielded type for dust-proof dry environments, and MF72-2RS rubber sealed type for moisture and pollution-resistant working conditions. Supported with five industrial-grade material options, covering standard dry transmission, light humidity, dust, salt spray and mild chemical corrosion scenarios, it is a versatile upgraded miniature flange bearing for modern micro precision machinery.

MF72 Seal Type Features And Application Scenarios

1. MF72 Open (No Shield)

Featuring a fully open unobstructed structure, this version minimizes running friction and heat accumulation, delivering excellent sustained high-speed operation performance. It supports free grease replacement and routine equipment maintenance, with outstanding heat dissipation that avoids high-temperature grease failure during long working hours. Designed exclusively for fully enclosed, dust-free indoor precision equipment with stable circulating lubrication. Not resistant to dust and moisture, it is the optimal choice for high-speed, continuous-running micro transmission components.

2. MF72ZZ Double Metal Shields

Equipped with non-contact double-sided steel protective shields, it effectively isolates floating dust, fine processing particles and fiber impurities in the air. Pre-filled with high-stability low-temperature and high-speed grease, it achieves long-term maintenance-free operation. The non-contact structure does not hinder high-speed rotation, balancing dust-proof protection and extreme speed performance. Suitable for dry indoor micro motors, model drive systems, precision optical instruments and daily electronic precision equipment, unable to resist water and moisture penetration.

3. MF72-2RS Double Rubber Seals

Adopts upgraded elastic rubber lip contact sealing technology, forming a fully enclosed protective cavity inside the bearing. It effectively blocks dust, humid air, water splashes and oil stains, preventing internal grease loss, oxidation and failure. The enhanced sealing structure improves operational stability in variable environments and extends service life greatly. Ideal for semi-open workshops, slightly humid indoor environments and unattended long-running miniature automation equipment.

Material Performance And Industrial Application

1. GCr15 Chrome Steel (AISI 52100)

Features: High overall hardness, excellent wear resistance and structural rigidity, with significantly upgraded dynamic and static load capacity compared with MF62 series. It runs smoothly with low noise, featuring high cost performance and stable mechanical properties under long-cycle operation, with conventional anti-rust limitations.

Applications: The preferred material for standard industrial micro transmission scenarios, widely used in micro drive motors, RC model power components, precision instrument rotating parts and commercial miniature automation equipment.

2. 420 Stainless Steel

Features: Heat-treatable magnetic martensitic stainless steel, with reliable oxidation resistance and basic anti-rust performance. It possesses good impact toughness and stable intermittent operation capability, serving as the most economical anti-corrosion material for general miniature machinery.

Applications: Suitable for mildly humid indoor working environments, household smart miniature devices, small electronic precision equipment and cost-effective anti-rust micro mechanical projects.

3. 440 Stainless Steel (440C)

Features: High-performance hardened stainless steel, integrating high hardness, wear resistance and moderate corrosion resistance. It maintains stable output under medium-speed and micro-load cyclic operation, with far better durability than ordinary stainless steel, achieving a perfect balance of load capacity and anti-rust performance.

Applications: Universal industrial anti-rust grade, applicable to food-grade miniature transmission equipment, precision medical micro-instruments, light salt spray environments and high-stability micro mechanical components.

4. 304 Stainless Steel

Features: Non-magnetic food-grade austenitic stainless steel, with excellent moisture resistance and weak acid-base corrosion resistance. It supports water washing and high-temperature sterilization, featuring hygienic and pollution-free properties. Non-hardenable with low hardness, only applicable for low-speed and light-load steady operation.

Applications: Professional hygienic scenarios including food processing micro-equipment, medical auxiliary miniature devices, clean laboratory precision instruments and sanitary smart equipment parts.

5. 316 Stainless Steel

Features: Molybdenum-reinforced anti-corrosion stainless steel, with superior resistance to chloride erosion, seawater salt spray and chemical liquid corrosion. Non-magnetic and sterilizable, it adapts to harsh corrosive environments that ordinary stainless steel cannot withstand.

Applications: Specialized for severe corrosion scenarios, widely used in marine miniature sensing equipment, chemical micro-instruments, high-grade medical disinfection components and anti-corrosion micro transmission devices.