Production Machining

MAY 2018

Production Machining - Your access to the precision machining industrial buyer.

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Contributed by Barry Rogers Why Honing Oils Matter Like any metalworking process, honing relies on a systemized approach of components working in concert to deliver optimized results. Honing oil is one of these critical components, and this article examines the role it plays in a successful honing operation. :: To achieve high dimensional and surface finish specifications all components in the honing process must be matched to perform the operation in concert. H oning is an abrasive process capable of producing bore size tolerances as small as 0.00002 inch (20 millionths of an inch, or one-half of 1 micron) and is typically used in components that demand the highest level of precision. Honing can consistently hold extremely tight tolerances at sub-micron levels, even when running millions of parts. Holes from 0.060 inch to 60 inches in diameter can be honed, in virtually any type of material used in manufacturing. e success of the honing process depends on the precise performance of each of five key components of the honing system: the machine, fixturing, tooling, abrasive and honing oil. Even though honing oil accounts for around one percent of the total process cost, selecting the right honing oil has a direct and immediate impact on abrasive consumption, labor, cycle times and quality. When the right honing oil is left out of the equation, it will definitely lead to reduced production and increased costs. e wrong oil could drastically increase cycle times by adversely affecting metal removal rates by 50 percent or more and reduce abrasive life by 30 percent or more. Selecting the wrong oil will also drive up scrap costs because of missed tolerances and poor surface finishes. Specialty Lubricity Agents and Additives Honing oils and lubricants serve several important purposes in the honing process. ey reduce friction and thus heat, which can cause major problems during honing such as welding and decreased abrasive life. ey also wash away the chips or swarf from the surface of the workpiece during honing, which brings new abrasive grit to the surface of the stone to maintain optimum abrasive cutting action. Chemical activity is another impor- tant reason for using a top-quality honing fluid. A good honing fluid must not corrode the workpiece, but stay in contact with the workpiece METALWORKING FLUIDS 30 PRODUCTION MACHINING :: MAY 2018

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