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No hay artículos en el carroDescripción del producto
Las bolas de acero chapado en cromo demuestran alta dureza, resistencia a la deformación y excelentes características de desgaste. Las aplicaciones ideales para bolas de cromo incluyen medios de caída, agitación de latas de pulverización, rodamientos de bolas, diapositivas de cajones, instrumentos de escritura, acabado vibratorio, componentes de movimiento lineal, válvulas de retención y mecanismos de bloqueo.
Especificaciones:
Grado: 25
Material: Acero chapado en cromo AISI 52100
Material: Acero chapado en cromo (AISI 52100)
Diámetro estándar: 1/2, 0.5 pulgadas
Diámetro métrico: 12,7 mm
Peso: 0.2969 onzas (8.419 gramos)
MR TERRY L PECK
Comentado en los Estados Unidos el 2 de noviembre de 2024
Perfect size to replace lost ‘steelies’ for kids game.
Jeff
Comentado en los Estados Unidos el 8 de septiembre de 2024
Works in my flip ball game ok.
Ms. Moneypenny
Comentado en los Estados Unidos el 29 de septiembre de 2024
SUMMARYThese 10-piece bags of Ø ½″ bearing balls are OK… but only if you know how to cut through the seller’s false claims. The seller undoubtedly knows full well that the 52100-alloy isn’t stainless; they are counting on the ignorance of buyers, who may well truly need stainless bearing balls for their applications. DETAILS👎 Does the supplier have good quality control? No. One of the ten balls in my 10-piece bag was a wild outlier. It was bigger than 12 mm ball (0.47244) and smaller than 0.5000; I don’t know what it was supposed to be. It was a clear miss-sort (or defect) and I threw it away. 👍 Are they compliant with G25 specs? Probably. I don’t own the highly precise measuring instruments required to confirm whether or not these are truly G25-grade, which requires that all the balls within a lot (a 10-piece bag) have the same diameter to within 0.00005 inch). But to the best of my ability with my micrometer, nine of the ten good balls met the G25 specs as I could detect no ball-to-ball variation. See photo. 👎👎 Are they “stainless” steel? No… and no. Whether these are stainless or not is important because virtually no Amazon customer buying bearing balls here on this page is machining, grinding, and lapping bearing races where durable, wear-resistant, 52100 bearing balls (and proper bearing grease) are required. Far more likely is they DO need corrosion resistance due to the environment and operating conditions. The seller is counting on most customers not knowing what “52100” means, but it is THE alloy that makes highly durable, wear-resistant bearing balls for heavy-duty bearing applications. However, 52100 is by no means stainless (resistant to rusting without being bathed in bearing grease). ” The 52100 alloy has only 1.3–1.6% chromium. No steel alloy can be regarded as stainless unless it contains at least 10.5% chromium; that’s where the “18-8” stainless alloy gets its name (304 is an 18-8 alloy): it contains 18% chromium, which makes it very rust resistant and suitable for making flatware (forks and spoons). As a magnet is strongly attracted to the bearing balls I received, they are undoubtedly 52100, which makes them suitable for use in heavy-duty bearing applications. However, if you have an application where you need corrosion resistance, such as exposure to the elements, then you should look elsewhere here on Amazon for bearing balls made of 304 stainless, which is an “18-8” alloy that won’t rust… and you can confirm that because a magnet will only very weakly—if at all—be attracted to 304.
Customer
Comentado en los Estados Unidos el 4 de octubre de 2023
Very nice item,but took to way long to receive it. Using for making round balls from coins
Kevin Tran
Comentado en los Estados Unidos el 18 de octubre de 2022
I'd leave a 1 star because for my purposes they did not work.It's intended use is for lubed bearing application. I instead wanted to use these for the Hario coffee immersion drip, they rusted after a few days.
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