Har-Lon Contracting

Har-Lon Contracting Providing customers with experienced oilfield and industrial maintenance, our team is ready to tackle any project.

Years of fabrication and welding experience combined with knowledgeable millwrights we know what it takes to do the impossible!

06/01/2026
Livestock sliding gate job today, great clients, fun new projects!
06/01/2026

Livestock sliding gate job today, great clients, fun new projects!

Ancient plainer! Cool old piece of mill equipment!
05/29/2026

Ancient plainer! Cool old piece of mill equipment!

  After hours fan bearings and alignment job this week. Made some modifications to motor base for easy adjustment and go...
05/28/2026


After hours fan bearings and alignment job this week. Made some modifications to motor base for easy adjustment and got it back in and tested.

04/21/2026

Making some adjustments to keep these dang rocks on the belt, stay tuned for final results

Knowing a thing or 2 about ball mills, this would be a pretty intense process!
04/21/2026

Knowing a thing or 2 about ball mills, this would be a pretty intense process!

A through-wall crack developed in the hardened steel shell of a 36-foot diameter ball mill due to heavy ore impact. I stopped the mill and cleared the grinding media. I gouged out the crack on both sides of the shell using an air carbon arc torch to create a double-V groove. I preheated the shell area to 450°F using propane torches. I welded the repair using E8018-C2 low hydrogen electrodes to match the tensile strength of the mill shell. I used a backstepping sequence, welding 4-inch beads from the center outward to control shrinkage stress on the cylindrical shell. I alternated welding from the inside to the outside to balance the heat input. I deposited a total of 22 layers. After welding, I wrapped the area in ceramic blankets to simulate a slow cool. The mill was restarted and ran at full load for 48 hours with no vibration.

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Turner Valley, AB

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