300pcs 6 Sizes Various Precision Steel Bearing Balls 2/32 1/8 5/32 3/16 7/32 1/4 Inch Grade 25 G25Feature:1. Good wear resistance, hardness up to 60-62 (HRC), constant compression;2. Solid steel ball with strength, super precise wear resistance, greasy packaging, mirror brightness, good material wear resistance, high precision processed into finished steel balls, steel balls bearing steel balls can be used for welding;3. Nine processes finely polished: stretching, cold forging, light ball, softball, heat treatment, quenching, grinding, grading, packing;4. High-quality materials: using high-quality materials, exquisite workmanship, quality assurance, suitable for multiple purposes;5. Exquisite craftsmanship: after several processes of stamping, annealing, compaction, anti-extrusion testing, durable;6. Solid compression: the bearing steel ball is a solid steel ball with strong compressive strength; At the same time, it has good toughness, not easy to break, high hardness and high precision, and is suitable for precision instruments and mechanical equipment. Specification: Product material: GCr15 bearing steel (chemical composition: GC15 refers to a kind of high carbon chrome bearing steel with less alloy content, after quenching and low temperature quenching, it has high hardness, uniform structure, good wear resistance, high fatigue performance.)Production Process: Stamping, Annealing, Hard Grinding, Grinding and other Multiple ProcessesSurface Treatment: Polishing, Degaussing, GrindingProduct Advantages: Smooth and flat surface, high strength and wear resistance, super toughnessScope of application: Engines, Aerospace, Civil Cars, CNC Machine Tools, Mechanical Engineering, Bicycles, Motorcycles, Ships, Yachts, etc. Note:1. There may be slight deviations in size due to manual measurement, different measurement methods and tools.2. The picture may not reflect the actual color of the item due to different light, angle and shooting monitor.50X3/32" Ball Bearings50X1/8" Ball Bearings50X5/32" Ball Bearings50X3/16" Ball Bearings50X7/32" Ball Bearings50X1/4" Ball Bearings