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11-17-14 | 06:33 PM

tk1971

Senior Member

Joined: Sep 2010

Posts: 273

Likes: 0

From: San Gabriel, CA

Bikes: Nishiki Prestige, Reign, IH Warrior, Rockhopper, Brompton, Q-Bike, Forever, Free-Ride, Dahon, Merckx Premium, Litespeed Teramo, Raleigh MTi 1000, Motobecane Fly Ti, OnOne 456, Kona Unit, Transition TransAM

McMaster Car.

McMaster-Carr

[h=3]Hardened Shock-Resistant S2 Tool Steel[/h]
An extremely strong tool steel, S2 offers excellent impact resistance. These balls have been through hardened yet retain a tough core that resists breaking under shock loads. They are ground and polished to a reflective finish.
View detailed performance properties and composition for steel, and heat-treating guidelines for tool steel.
Warning! Hardness and yield strength are not guaranteed and are intended only as a basis for comparison.

Hardened Balls—Reflective Finish

Yield Strength: 290,000 psi
Hardness: Very Hard (Rockwell C55)
Meet ASTM A681

[TABLE="class: ItmTbl"]
[TR]
[TD="class: ItmTblBaseHdrBorderCell ItmTblColBaseHdrNoPivotIndent NoWrapCell, colspan: 1"]Dia.[/TD]
[TD="class: ItmTblBaseHdrBorderCell ItmTblColBaseHdrSpecInterior NoWrapCell, colspan: 1"]Dia.
Tolerance[/TD]
[TD="class: ItmTblBaseHdrBorderCell ItmTblColBaseHdrSpecInterior NoWrapCell, colspan: 1"]Pkg.
Qty.[/TD]
[TD="class: ItmTblBaseHdrBorderCell ItmTblColBaseHdr NoWrapCell, colspan: 1"] [/TD]
[TD="class: ItmTblBaseHdrBorderCell ItmTblColBaseHdrEndPrice NoWrapCell, colspan: 1"]Pkg.[/TD]
[/TR]
[TR]
[TD="class: ItmTblCellIndentPivotNone ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]3/16"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]±0.001"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpecBefrPartNbr ItmTblContentCell NoWrapCell, colspan: 1"]100[/TD]
[TD="class: ItmTblCellPartNbr ItmTblColSpacePartNbr ItmTblContentCell NoWrapCell"]1995T11[/TD]
[TD="class: ItmTblCellPrce ItmTblColSpacePrceAftrPartNbr ItmTblColSpacePrceTblEnd ItmTblContentCell NoWrapCell, colspan: 1"]$3.03[/TD]
[/TR]
[TR]
[TD="class: ItmTblCellIndentPivotNone ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]1/4"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]±0.001"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpecBefrPartNbr ItmTblContentCell NoWrapCell, colspan: 1"]100[/TD]
[TD="class: ItmTblCellPartNbr ItmTblColSpacePartNbr ItmTblContentCell NoWrapCell"]1995T12[/TD]
[TD="class: ItmTblCellPrce ItmTblColSpacePrceAftrPartNbr ItmTblColSpacePrceTblEnd ItmTblContentCell NoWrapCell, colspan: 1"]5.60[/TD]
[/TR]
[TR]
[TD="class: ItmTblCellIndentPivotNone ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]5/16"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]±0.001"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpecBefrPartNbr ItmTblContentCell NoWrapCell, colspan: 1"]100[/TD]
[TD="class: ItmTblCellPartNbr ItmTblColSpacePartNbr ItmTblContentCell NoWrapCell"]1995T13[/TD]
[TD="class: ItmTblCellPrce ItmTblColSpacePrceAftrPartNbr ItmTblColSpacePrceTblEnd ItmTblContentCell NoWrapCell, colspan: 1"]8.63[/TD]
[/TR]
[TR]
[TD="class: ItmTblCellIndentPivotNone ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]7/16"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]±0.001"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpecBefrPartNbr ItmTblContentCell NoWrapCell, colspan: 1"]50[/TD]
[TD="class: ItmTblCellPartNbr ItmTblColSpacePartNbr ItmTblContentCell NoWrapCell"]1995T14[/TD]
[TD="class: ItmTblCellPrce ItmTblColSpacePrceAftrPartNbr ItmTblColSpacePrceTblEnd ItmTblContentCell NoWrapCell, colspan: 1"]9.16[/TD]
[/TR]
[TR]
[TD="class: ItmTblCellIndentPivotNone ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]1/2"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]±0.001"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpecBefrPartNbr ItmTblContentCell NoWrapCell, colspan: 1"]50[/TD]
[TD="class: ItmTblCellPartNbr ItmTblColSpacePartNbr ItmTblContentCell NoWrapCell"]1995T15[/TD]
[TD="class: ItmTblCellPrce ItmTblColSpacePrceAftrPartNbr ItmTblColSpacePrceTblEnd ItmTblContentCell NoWrapCell, colspan: 1"]11.59[/TD]
[/TR]
[TR]
[TD="class: ItmTblCellIndentPivotNone ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]9/16"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]±0.001"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpecBefrPartNbr ItmTblContentCell NoWrapCell, colspan: 1"]50[/TD]
[TD="class: ItmTblCellPartNbr ItmTblColSpacePartNbr ItmTblContentCell NoWrapCell"]1995T16[/TD]
[TD="class: ItmTblCellPrce ItmTblColSpacePrceAftrPartNbr ItmTblColSpacePrceTblEnd ItmTblContentCell NoWrapCell, colspan: 1"]14.67[/TD]
[/TR]
[TR]
[TD="class: ItmTblCellIndentPivotNone ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]11/16"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]±0.001"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpecBefrPartNbr ItmTblContentCell NoWrapCell, colspan: 1"]25[/TD]
[TD="class: ItmTblCellPartNbr ItmTblColSpacePartNbr ItmTblContentCell NoWrapCell"]1995T17[/TD]
[TD="class: ItmTblCellPrce ItmTblColSpacePrceAftrPartNbr ItmTblColSpacePrceTblEnd ItmTblContentCell NoWrapCell, colspan: 1"]13.41[/TD]
[/TR]
[TR]
[TD="class: ItmTblCellIndentPivotNone ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]3/4"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]±0.001"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpecBefrPartNbr ItmTblContentCell NoWrapCell, colspan: 1"]25[/TD]
[TD="class: ItmTblCellPartNbr ItmTblColSpacePartNbr ItmTblContentCell NoWrapCell"]1995T18[/TD]
[TD="class: ItmTblCellPrce ItmTblColSpacePrceAftrPartNbr ItmTblColSpacePrceTblEnd ItmTblContentCell NoWrapCell, colspan: 1"]15.56[/TD]
[/TR]
[TR]
[TD="class: ItmTblCellIndentPivotNone ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]13/16"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]±0.001"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpecBefrPartNbr ItmTblContentCell NoWrapCell, colspan: 1"]10[/TD]
[TD="class: ItmTblCellPartNbr ItmTblColSpacePartNbr ItmTblContentCell NoWrapCell"]1995T19[/TD]
[TD="class: ItmTblCellPrce ItmTblColSpacePrceAftrPartNbr ItmTblColSpacePrceTblEnd ItmTblContentCell NoWrapCell, colspan: 1"]8.63[/TD]
[/TR]
[TR]
[TD="class: ItmTblCellIndentPivotNone ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]7/8"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]±0.001"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpecBefrPartNbr ItmTblContentCell NoWrapCell, colspan: 1"]10[/TD]
[TD="class: ItmTblCellPartNbr ItmTblColSpacePartNbr ItmTblContentCell NoWrapCell"]1995T21[/TD]
[TD="class: ItmTblCellPrce ItmTblColSpacePrceAftrPartNbr ItmTblColSpacePrceTblEnd ItmTblContentCell NoWrapCell, colspan: 1"]10.63[/TD]
[/TR]
[TR]
[TD="class: ItmTblCellIndentPivotNone ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]15/16"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]±0.001"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpecBefrPartNbr ItmTblContentCell NoWrapCell, colspan: 1"]10[/TD]
[TD="class: ItmTblCellPartNbr ItmTblColSpacePartNbr ItmTblContentCell NoWrapCell"]1995T22[/TD]
[TD="class: ItmTblCellPrce ItmTblColSpacePrceAftrPartNbr ItmTblColSpacePrceTblEnd ItmTblContentCell NoWrapCell, colspan: 1"]12.29[/TD]
[/TR]
[TR]
[TD="class: ItmTblCellIndentPivotNone ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]1"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpec ItmTblContentCell NoWrapCell, colspan: 1"]±0.001"[/TD]
[TD="class: ItmTblCellSpec ItmTblColSpaceSpecBefrPartNbr ItmTblContentCell NoWrapCell, colspan: 1"]10[/TD]
[TD="class: ItmTblCellPartNbr ItmTblColSpacePartNbr ItmTblContentCell NoWrapCell"]1995T23[/TD]
[TD="class: ItmTblCellPrce ItmTblColSpacePrceAftrPartNbr ItmTblColSpacePrceTblEnd ItmTblContentCell NoWrapCell, colspan: 1"]14.39[/TD]
[/TR]
[/TABLE]

Dunk them in a container of motor oil for storage if you are concerned. Honestly, I've had a baggie of 1/4" balls in my garage for more than a decade and have noticed zero rust whenever I dig into it for a rebuild.