Hollow Bar Brings Competitive Edge to Component Machining

Traditionally in the U.S., solid bar is the material of choice when it comes to machining components.

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Traditionally in the U.S., solid bar is the material of choice when it comes to machining components. However, when a central bore is being machined, Sandvik argues that by selecting near-net-shape, machine optimized hollow bar, machine shops can significantly increase their output.     

Many factors influence profitability in the machining process the main ones include type of CNC machine, machining methods, workpiece material, machinist skills, labor costs, country of production and tooling. Among these factors, choice of the workpiece material represents about 17 percent of the overall cost.

The advanced machinability of Sanmac hollow bar means increased cutting speeds and feed rates are achievable. Because the dimensional stability and material consistency from batch to batch is identical, no adjustment is required to be made, so machine settings remain the same reducing setup and processing time the company says. When compared with solid bar, hollow bar helps to reduce setup time, machine cycle times, drilling chips, tooling costs, lubricant usage, electricity consumption and freight costs, offering users an operational advantage, the company says.

Sanmac hollow bar offers a complete selection of material choices. These are available in sizes ranging from OD by ID combinations, and any size configuration in between, to suit customers’ production requirements. Hollow bar in non Sanmac alloys are also available on request.

Looking at this from another perspective, the use of hollow bar allows machine shops to increase their production capacity without capital investment.