Providing High Quality, Specialty Product Solutions for Over 100 Years
... Roll Easy with FRANTZ®
Steel Ball Quality
At FRANTZ Manufacturing Company, Sterling® Steel Ball Division, we take our steel ball product Quality seriously.

  • We manufacture steel balls from raw material to finished product.
    We control the entire process to ensure a quality product. Our steel balls are made to rigid automotive industry standards. Our Quality Management System, established in 1998, is registered to IATF 16949:2016. Click here for certificate. We have manufactured steel balls since 1947 and understand the properties that make for a quality ball product.

  • We have a strong product inspection process.
    In addition to visual inspection of finished product, we employ roller size sorting techniques and eddy current technology to verify that your product meets expectations.

  • We have a sophisticated product testing laboratory.
    Our laboratory examines case depth, hardness, and other metallurgical qualities that our products, balls or bearings, must meet. We sample our steel ball production runs and put the sample through a rigorous testing scheme to assure ourselves that the process is producing products that meet our own high quality standards.

Examples of Equipment in our Quality & Testing Department

Hot/Cold Epoxy Press Mount

Balls are formed in a hot/cold press epoxy powder.

Precision Wet Abrasive Cut-Off Machine

 The finished mount is then cut in half with a precision cut-off machine.

Grinder and Polisher

  The grinder and polisher is used to create a mirror-like surface on the flat surface
of the mounted and sectioned ball so that it can be examined with the metallograph.

Microhardness Tester

This machine is used to make a precision indentation in a highly-polished, flat, metal surface, and then measure that indentation. The size of the indentation is directly related to the hardness of the metal at the location of the indentation. By making a series of indentations from ball surface to core, numerical values can be assigned to surface hardness, core hardness and effective case depth.

Metallograph (reflected light microscope)

The metallograph is used to examine and evaluate the internal microstructure of the ball.

Rockwell Surface Hardness Tester

This machine is used to indent the surface of a ball to check surface hardness to ABMA Standards.

Stereoview Microscope

Used to test fracture grain to validate proper case after heat treating.

Diameter Gauge

The diameter of the balls is measured with precision gages in custom fixtures designed specifically for balls so that desired accuracy is achieved.

Surface Roughness Tester - Profilometer

The shiny surface of the balls is actually composed of tiny scratches.  The instrument measures those scratches to conform to roughness standards ISO-1997 and ANSI.

TIR Gauge

This gauge is used to measure the Total Indicated Runout, or "concentricity" of bearings
and drilled ball products.

FRANTZ Sterling® Steel Ball Quality. Simply better.

Product Selector
Click Here
Impact Testing
Steel Conveyor Wheels
Impact Rating

FRANTZ goes the extra mile to provide the industry’s best conveyor wheels!
Click here to learn more.
My Shopping Cart

Quality Certifications &
Industry Standards
Terms & Conditions of Use     |       2022 FRANTZ Manufacturing Co.
1000 Series - Crimping Tool300 Series - Crimping Tool620 Series - Crimping ToolABEC-1 Core Precision BearingsAbout FRANTZAbout FRANTZ ManufacturingABOUT USAbsentee PolicyAdvertising InformationBall Bearing Sheaves, Idler, Pulley and Guide WheelsBall TransfersBall TransfersBALLSBearing Packaging OptionsBrochures & LiteratureBurnishing MediaBurnishing MediaCareersCAREERSChamfered BearingsCompetitor DefectsCompetitor Match-UpContact Felt Seal Conveyor Bearing ProtectionContact FRANTZ ManufacturingCONTACT USContact Your Sales RepresentativeConversion FactorsConveyor Bearing and Conveyor Wheel QualityConveyor Bearing CatalogConveyor Bearing Mounting SpecificationsConveyor Bearing NomenclatureConveyor BearingsConveyor BearingsConveyor BearingsConveyor Roller Mounting TypesConveyor Wheel CatalogConveyor WheelsConveyor WheelsConveyor WheelsConveyor Wheels / Skate WheelsCore Non-Precision BearingsCustom Conveyor Roller DetailsCustom Conveyor RollersCustom Machined and Cold Formed Steel SpacersCustom Machined SpacersCustomer Service EmailEasy Glider™ Ball Transfers and Ball CastersEconomy Grade Hardened Steel BallsEconomy Grade Hardened Steel BallsEmployee InformationFitment Tooling InformationFlanged and Straight Faced IronGrip AdaptersFlanged Unground Non-Precision BearingsFlexible Spending Plan SummaryFractions to DecimalsFRANTZ Garage Door InformationFRANTZ Health Plan (2009)FRANTZ Health Plan AmendmentFRANTZ Insert ToolsFRANTZ SpecialtiesGEN II® Semi-Precision Conveyor BearingsGenII® Core Semi-Precision BearingsGenStar® 4003 Series Precision Conveyor BearingsGenStar® 5000 Series Precision Conveyor BearingsGenStar® Eliminator BearingsGenStar® Precision BearingsGenStar® Precision Conveyor BearingsHardened Carbon Steel BallsHardened Carbon Steel BallsHoliday ScheduleHOMEIdler GuideIL Equal Opportunity StatementInformación TécnicaInventory OverstockMaps and Directions to FRANTZ ManufacturingMeasurementMetric Conveyor WheelsMetric Flanged Unground Non-Precision BearingsMetric GEN II® Semi-Precision Conveyor BearingsMillimeters to InchesNewsOur QualityOur WarrantyOverhead Conveyor ComponentsPower Swage 2.5” Flanged BearingsPrecision ABEC-1 - Machined BearingsPrecision Drilled BallsPrecision Ground Drilled BallsPress and Swage Fit ToolingPress and Swage Fit ToolingPress Fit Conveyor Bearing MountsPress ReleasesPrivacy NoticePrivacy StatementProduct CatalogsProduct IndexesProduct SelectorsRadial Thrust Conveyor BearingsRegreasable & High Temp Conveyor BearingsRegreasable Conveyor BearingsRegreasable Conveyor BearingsRESOURCESSafety RulesServices BrochureSheave CatalogSheavesSheavesSlip and Swage Fit ToolingSlip and Swage Fit Tooling DetailsSoft Ground Polished BallsSoft Ground Polished Steel BallsSprocketed CDLR Conveyor Roller BearingsStainless Steel Ball TransfersStainless Steel BallsStainless Steel BallsStainless Steel Conveyor BearingsStainless Steel Skate WheelsSteel Ball GlossarySteel Ball PackagingSteel Ball QualitySteel BallsSterling Armor®Sterling Armor®Sterling Armor®Sterling Armor®Straight Faced Semi-Precision BearingsStraight Faced Unground Non-Precision BearingsSwage Fit Conveyor Bearing MountsSwage Fit Conveyor Bearing MountsTapered Conveyor Roller BearingsTechnical InformationTechnical InformationTerms and Conditions of UseTOOLSTube ID and GaugeVideosWHAT'S NEWWhat’s New at FRANTZWide Flanged Unground Non-Precision BearingsWork Rules