GL manufactures pistons and liners up to 500mm diameter for diesel, gas, dual-fuel and other type of engines. Annual production capacity for pistons is 1.000.000 and for liners it is 500.000. .


Our piston & liner production history goes back to 1987. Today, our piston & liner manufacturing takes place in Konya with its OEM production experience in 30.000 m² factory, with a high technology laboratory, with more than 200 employees. Each step of the manufacturing process is designed to meet the OEM production standards. GL currently manufactures 360 different pistons and 180 different liners. Additionally, the company manufactures supplementary product such as pins & retainers. GL is capable of manufacturing special design pins using 3 sequential processes with fully automated grinding line and lapping facility.

GL is capable of producing articulated pistons:
» Forged steel
» Aluminum alloy
» Nodular cast iron
» Steel
Centrifugal casting method which produces higher quality liners compared to the static casting method is applied in the liner production.

Quality
We guarantee our products quality by implementing DIN EN ISO 9001-2008, TS 16949 quality standards in every phase of our production. GL employs latest technology machinery of Japanese, German, Taiwan origin. Quality control is operated with high precision machinery to achieve 100% quality.

Quality Control
GL applies quality control during and after production. Every single piston, liner and the supplementary products pass through the quality control steps stated below:
» Material chemical analysis
» Casting micro structure control & etc.
» Universal hardness control
» Micro hardness tests
» Hardness depth control (especially forpins)
» Ultrasonic alpine sticking test
» 100% eye control
» 100% precision dimension controls with CMM machines.

Additionally, round test, digital height measurement, surface roughness measurement, volume measurement and coordinate measurements can be applied in our laboratory.