Industrial Metal Ball Grades
US Ball subscribes to the A.F.B.M.A. Industrial Ball Grades standards which are listed in this chart. Definitions of the listed custom metal ball tolerances are likewise listed below. The most common ball tolerances are listed. All the metal balls grades include many other tolerances which have not been listed. From metric to miniature to large and small metal precision balls.
Allowable deviation from spherical ball form: The greatest radial distance in any radial plane between a sphere circumscribed around the precision ball surface and any point on the industrial ball surface.
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Ball Surface roughness: The irregularities which form the surface relief but are not deviations of form or waviness.
Basic ball diameter tolerance: The maximum allowable deviation in any precision metal ball mean diameter from the basic diameter ordered. Metric and Standard.
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Ball Grade |
Deviation From Spherical Ball Form | Surface Roughness Arithmetical Average (in micro-inches) | Basic Ball Diameter Tolerance (+/-) |
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3 5 10 16 24 25 48 50 100 200 500 1000 |
.000003" .000005" .000010" .000016" .000024 .000025" .000048" .000050" .0001" .0002" .0005" .001" |
.5 .8 1.0 1.0 2.0 2.0 3.0 3.0 5.0 8.0 |
.000030" .000050" .0001" .0001" .0001" .0001" .0002" .0002" .0005" .001" .002" .005" |
US Ball Corp utilizes all manner of materials. The table below is a list of the most common materials used. Need a different material? "No problem." Just let us know what you need, and we will take care of it, and manufacture your next precision ball requirements.
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Alloy Steels M50 100 Chrome Steel, 52100 Graph Mo 1013 1018 1018 Carbonized Rc 60 min 1215 4130 4140 4340 M50 M2 Soft Carbon, Mild Steel Hard Carbon Cast Iron 12L14 8620 |
Ferritic Stainless 429 430 430 F SE |
Austeitic Stainless 302 303 304 304 L 316 316 L 317 316LVM 321 347 |
Martensitic Stainless 410 416 420 430 431 440 C 440 A 440 V Lescalloy BG 42 |
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Age Hardenable Stainless Balls 17-4 PH 17-7 PH 15-5 PH Custom 450 Custom 455 |
Specialty Stainless Balls Nitronic 32 Nitronic 33 Nitronic 40 Nitronic 50 Nitronic 60, (trade mark of Armco Inc.) Alloy 20, Carpenter 20 606 Invar 36, Knar 608 Kovar |
Copper Alloys 101 Copper 102 Copper 110 Copper C172 BeCu C260 Brass. 70/30 C360 Brass C464 Bronze, Naval Brass, Mil-B-1083 Comp 6, MS19063 C510 Phos Bronze A C624 Bronze, Alum Bronze C630 Alum Bronze |
Aluminum Alloys 1100 2011 2017 2024 5052 5056 6061 7075 2219 |
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Colbalt Based Super Alloys Cobalt Elgiloy Haynes Alloy 25, L-605 Stellite® |
Iron Based Super Alloys A-286 Discaloy Incoloy 800 |
Nickel Alloys Nickel 200 Nickel 400 (Monel) Nickel 500 (K-Monel) Hastelloy C276 Hastelloy B2 Inconel 600 Inconel 625 Inconel 718 Inconel X-750 Waspalloy Rene 41 Hastelloy X Hastelloy B3 Incoloy 825 Monel R405 MP35N |
Tin-Lead Balls Tin Lead Babbit |
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Titanium Alloys Balls Commercial Pure, Gr 2 6AL4V, Gr 5 6AL4V Eli Commercial Pure Gr 1 |
Tungsten Carbide Balls C6, 6% Cobalt C13, 13% Cobalt 6% Ni |
Ceramic Balls
A1203, Aluminum Oxide, Alumina 99.95% Min SiN03, Silicon Nitride Silicon Carbide Saphire Ruby Titanium Carbide Alumina 90% Zirconia - Mg Stabilized Zirconia- yttrium Stabilized Aluminum Nitride Zirconium Carbide Hex Boron Nitride |
Glass Balls Soda Lime Borosilicate Fused Silica, Quartz |
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List of Metals for Balls Beryllium Bismuth -99.9% Gold Hafnium Indium Iridium Magnesium Molybdenum TZM Niobium, Columbium Platinum Rhenium Silver Tantalum Tungsten Vanadium Zirconium ABS Acetal, Delrin Acrylics Epoxy's Fluorocarbons-Teflon PVDF, Kynar Nylons Phenolics, Bakelite Poly Carbonates LD P.E., Polyethylene HD .P.E. P.P., Polyprpoplene |
Rubber Balls Viton-75 Durometer Viton-90 Durometer Poly urethane 88 Shore A Buna N, Nitrile 70 Shore A |
Other Ball Materials Graphite |
Contact us to manufacture your next metal ball requirement.
United States Ball Corp.
15919 Phoebe Ave,
La Mirada, CA 90638
Tel: 714-521-6500
Fax: 714-521-6504
Email: sales@usball.com
Balls