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Screening Reliability with General Kinematics’ STM-SCREEN™

 by General Kinematics,

Copper Installation-  A Deep Dive into Reliability


The Scenario:

Using the current footprint, the customer wanted to replace an existing screen in a Sag Mill copper installation with a General Kinematics STM-SCREEN™. To avoid unplanned downtime, the operations team swapped out their existing screen 4 times per year. The costs incurred due to the frequency of rebuilding the screen, including, replacement parts, downtime, and maintenance personnel were substantial. 

By the Numbers:

  •       Parts spend annually $550,000 USD
  •       Machine rebuild time annually – 400 total hours
  •       Reactive downtime – approximately 50 hours annually


Complete ROI in 8 months:

The customer understood that the GK STM-SCREEN™ wasn’t the “same screen” from a different OEM, but an entirely new design. After researching GK’s STM-SCREEN™, the team came to the conclusion that this screen would run, without fail. The immediate benefit was the $550K in parts spend removed from their reoccurring expenses. In this case, the customer redeployed their personnel to other projects and did not adjust headcount. However, they did calculate standard hourly rates multiplied by 400 hours of machine rebuild time to add to their ROI calculation. Lastly, their downtown per hour rate was defined by the average amount per work order with no loss production factored into the equation. This dollar amount was then multiplied by the historical 50 hours of reactive downtime. The total of these calculations provided a documented ROI in 6 months.

Intangible Business Benefits

Maintenance planners thrive on consistency and resources. By eliminating 4 rebuilds per year this customer was able to revise their maintenance plan and optimize their utilization. The time previously spent on rebuilds is now used to tackle other work orders. Additionally, with GK’s STM-SCREEN™, the customer was able to reduce costs associated with spare parts and the management of parts inventory.  


Maintenance leadership knew they had an issue that needed solving. Spending such a large percentage of their budget repairing a single screen was not sustainable. Running the numbers demonstrated they could purchase GK’s STM-SCREEN™, within the confines of their maintenance budget. Upon a successful startup, their new screen has been running without incident for 11 months. The maintenance team is being celebrated for their innovation and commitment to continuous operational improvement.

General Kinematics Corporation, incorporated in 1960, was established to market, design, and custom fabricate innovative vibratory equipment for the foundry, recycling, mining, and processing industries. Today the company continues as one of the world’s largest suppliers of vibratory processing equipment and has evolved into an industry-leading EPC firm. Headquartered in Crystal Lake, IL, General Kinematics has seven global locations providing engineering and support to a world-wide customer base. GK is a third generation, family-owned company and is ISO 9001 certified.