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Reducing downtime in shipyard’s hull manufacturing plant



At a large shipyard’s hull manufacturing plant, the rod and piston bronze bushings of a 2000T steel plate forming press cylinder were worn.This caused excessive radial movement and metal scoring of the moving metal components.

Root cause

The existing bronze bushings of the pistons and rods were worn by excessive lateral load on the cylinders and by the high number of press cycles. The radial movement caused mechanical damage of the hydraulic seals on the pistons and rods, leading to malfunctioning of the press cylinders. 

Worn, scored piston bushing.



The Chesterton engineering team recommended refurbishment of the worn bushings based on failure analysis of the seals and equipment inspection.


The Chesterton 16K Non-Metallic Hydraulic Wear Rings have exceptional physical properties with high bearing capacity to support heavy lateral loads. The built-in lubricants help reduce friction between mating surfaces to extend equipment and seal life. The split, cut-to-size bearing bands are snap-fitted in the grooves for easy installation. (Rod diameter 710mm (27.95″); Bore diameter 780mm (30.7″).

Bearing grooves being machined in the old bushing


The Chesterton 16K Non-Metallic Wear Rings were installed in the autumn of 2015.The main press cylinder has been in operation without malfunction for over 2 years, providing reliable and smooth operation for the 2000T steel plate forming press.

Benefits of 16K Wear Rings

  • Ease of installation
  •  Reduced repair budget for large diameter press cylinders
  • Faster repair time

Chesterton 16K cut wear rings are installed in the grooves

About us

Chesterton® is a world leader in helping process industry companies and manufacturers improve the reliability and efficiency of their rotating, stationary, and fluid power equipment platforms. We are known across a wide range of industries for our award-winning pump and valve sealing solutions, applications expertise, equipment maintenance and wear-prevention products, and knowledgeable hands-on local service. Chesterton product range includes mechanical seals, packing and gaskets, industrial lubricants and coatings.

® Registered trademark owned by A.W. Chesterton Company

EN36618.  Issued 07/2018.

Technical data reflects results of laboratory tests and is intended to indicate general characteristics only. A.W. Chesterton Company disclaims all warranties expressed or implied, including warranties of merchantability and fitness for a particular purpose. Liability, if any, is limited to product replacement only. Any images contained herein are for general illustrative or aesthetic purposes only and are not intended to convey any instructional, safety, handling, or usage information or advice respecting any product or equipment. Please refer to relevant Safety Data Sheets, Product Data Sheets, and/or Product Labels for safe use, storage, handling, and disposal of products, or consult with your local Chesterton sales representative.

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