#2 Piston Steel
Bar stock called #2 Piston Steel, also referred to as Turned, Ground, and Polished (TG&P), is a precision ground shafting produced as Cold Drawn, Ground and Polished; Cold Drawn, Turned Ground and Polished; or Hot Rolled, Turned Ground and Polished. All of the diameters carried are produced using the centerless ground and polished process.
The bars are ground to a very close tolerance and must be kept especially straight. After grinding, they are saw cut on one or both ends to provide uniform lengths necessary for rack plating or bar feeding. Specially manufactured abrasive belt polishing machines are used to provide shafting with a surface finish of 29 Ra (32 RMS) or better.
Commercial tolerances may vary by distributor holding to the range limits set in ASTM specification A-108. The Steel Supply Company also provides closer than standard tolerances on many products. Material can be polished to provide for a bearing fit or conveyor shaft application.
All #2 Chrome Piston Steel® begins as #2 Piston Steel and is processed using the exacting inspection requirements established over more than a century of providing this type of product.
Special packaging is available and ASTM specification A-700 is used as a guideline along with customer specifications. A general rule for packaging is to expect plain cardboard tubes and wooden crating. Any customized packaging may require an additional charge.