Tag Archives: Turbines

Shot Blasting

Structural Steel FAQ, Part 8 – Are All Turbines Created Equal?

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Shot blasting machines are widely used for surface preparation and finishing structural steel components for a variety of industries. In addition to specifically designing machines able to accommodate large, heavy, and bulky structural steel workpieces,  Rosler Metal Finishing also expertly designs the turbines within these machines for precise results.

Blast turbines accelerate and throw the blast media against the workpieces. They are for shot blast machines what the engines are for cars and trucks. Both determine the performance of the respective machine or vehicle including the speed of a sports car and the torque of a heavy-duty truck.

Like vehicle engines, the specifications of different turbines directly influence the performance of a shot blasting operation. This installment of our Structural Steel FAQ series will answer How do different blast turbines affect the quality of shot blasting results?

Blast Patterns

Blast patterns are the size and shape of the area where blast media strikes a workpiece as it progresses through the machine. The area of impact is also referred to as a “hot spot.” Long blast patterns are required to accommodate the large size of structural workpieces.

Concentrated blast patterns are often used in shot peening, but would not offer enough finishing coverage for structural steel applications. Similarly, the normal blast patterns used for casting and forgings are also not effective for structural steel.

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Shot Blasting

Air versus Turbine – Balancing Blasting Capabilities and Outcomes, Part 2

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In addition to the pro and con evaluation of air blasting and turbine lasting found in our previous blog, these two methods can also be compared in terms of throwing velocity, applications, and industries.

In terms of throwing velocity. Media thrown by turbines immediately start losing speed the moment that the turbine blade releases it, producing higher intensity blast results closer to the turbine. Larger shot retains its speed better over a distance and is commonly used to maintain intensity while creating a larger blast pattern by positioning the turbine(s) farther away. In contrast, media thrown by air nozzles will continue to accelerate for the first 100-300 mm outside of the nozzle depending on blast pressure and media size and density until the compressed air fully dissipates to the ambient environment, meaning that your best blast results occur a distance away from the nozzle.

Continue reading Air versus Turbine – Balancing Blasting Capabilities and Outcomes, Part 2 →

Shot Blasting

Rosler’s “Gamma G” Series Redefines Blast Turbine Performance

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With the revolutionary Gamma G turbine, Rosler has set a new milestone in continual turbine development. It is the most maintenance-friendly turbine in the world, it can be easily installed or retrofitted into a great range of systems, and has a unique price-performance ratio.

Featuring Y-shaped throwing blades made of forged tool steel for high durability. Since both sides of the throwing blades can be utilized, the cost for wear parts can be drastically reduced. Depending on the abrasive used, throwing blades can be used up to three times longer.

Read more about Rosler’s Gamma G turbines