SKF supplies mill pinion assemblies for a SAG mill in Russia

2019 July 15, 09:44 Africa

SKF supplied locally manufactured mill pinion assemblies including in-house designed bearing housings as well as a Taconite sealing solution to a longstanding customer in the local grinding mill sector intended for a 22x14 ft. SAG mill at a gold project in Russia.  

Project Engineering Team Leader at SKF, Janus Bezuidenhout, explains that the design for this very specific high load application needed to fulfill performance expectations and allow for the required modifications. In March 2019, SKF’s project engineering department supplied an assessment report on the re-designed mill and recommendations on the scope of work. 

As the customer re-designed the mill with new requirements, SKF had to provide calculations on the expected life cycle of the bearings and load ratings for the bearing housings. The customer decided to convert from a grease to an oil circulating lubrication system for the application which is operating with open spherical roller bearings to allow for misalignment of the pinion to the girth gear by means of the helical pinion gear. “We therefore recommended our robust and cost-effective Taconite sealing arrangement which is ideal for oil circulation systems,” affirms Bezuidenhout. He adds that there are several SKF oil circulating taconite sealing arrangements operating in a number of applications with great success. 

According to Bezuidenhout, SKF’s innovative solutions have impressed the customer who confirmed that the proposed housing and seal design would exceed the expected life at a cost that would make them competitive. “These advanced innovations will not only enhance uptime but will also save on total cost of ownership.” 
This order is currently in the manufacturing phase with SKF-approved suppliers fabricating the various components. The foundry for the castings is based in Kimberly, Northern Cape, whilst the machining of the housings and component manufacture are being completed in Boksburg, Gauteng. 

Delivery of the complete order is expected at the end of August 2019. In order to achieve this rapid five month turnaround, Bezuidenhout says that SKF’s engineering and sales departments collaborated seamlessly. “We always place our customers’ needs first and will tap into all our networks to ensure that we deliver the optimum solution to grow their business’s productivity and profitability levels.” 

As the customer has many years of experience as a specialist in the mill industry, they will be responsible for the installation and commissioning. However, SKF will support the customer by providing the necessary information on tooling requirements as well as assembly and pinion commissioning procedures. 

Wrapping up Bezuidenhout says that “Recognising the tough conditions of the SAG mill environment at this gold project in Russia, we were confident that our rugged SAG mill pinion assemblies are the optimal solution for this application. Through our exceptional local capabilities, internal team efforts, superior quality products and service solutions we are able to remain customers’ preferred bearing and rotating technology partner.” 

For further information please contact:
Samantha Joubert, Marketing Manager
Tel: +27 (0) 821 3602 / Fax: +27 (0) 86 681 4342

SKF’s mission is to be the undisputed leader in the bearing business. SKF offers solutions around the rotating shaft, including bearings, seals, lubrication, condition monitoring and maintenance services. SKF is represented in more than 130 countries and has around 17,000 distributor locations worldwide. Annual sales in 2018 were SEK 85 713 million and the number of employees was 44,428.
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