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What Is Bar Rolling & Planishing?

At Scot Forge, we can produce anything from a single bar to a full heat with our bar rolling or planishing expertise. 

Planishing and bar rolling are techniques we use to significantly reduce energy consumption and improved material properties. The metal's tendency to resist deformation is low when it is hot, which reduces energy consumption.

Hot rolling can improve the performance of metals and alloys by refining the microstructures in the metal. Coarse grains in the metal are broken,  cracks are healed, casting defects are reduced or eliminated.


Finish rolling (or planishing) begins as the forged bar goes through one of the four hyperbolic grooves of our custom-engineered GFM bar mill. The desired final dimension is reached after a series of bar rotations and reversing passes through the grooves. Using this process, we can offer Tartan Bars from 6" to 16". Larger precision forged bars up to 63" diameter can be manufactured on our open die presses.

Take a look at the bar rolling and planishing process in action! We use these methods to produce Tartan Bars®, a unique bar product offered only by Scot Forge. These bars are produced by combining a preliminary forging process, consolidating the center with a planishing operation, which provides a smooth rolled surface.

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Scot Forge Difference

At Scot Forge, we know the importance of getting your parts on-time, as expected. However, for customers new to procuring forgings, ordering a forging that will meet all specifications for end-use applications may be a challenge, which is why finding a trusted supplier and partner is essential. Our employee-owners are here to ensure your project stays on track with our forgings by offering:

Pro Tip - Did you know near-net shapes can save you time and money? Oftentimes, a customer calls to order a disc, which they will later machine down to a more shaped part. By working with our technically trained sales team you can get as close to your finished product shape as possible to optimize your production process. 

We can help you today!