Trade publisher Penton Media has folded the print editions of American Machinist and Welding Design & Fabrication. The titles were published under Penton’s manufacturing and supply chain group.

Each title will continue to produce their respective Web sites, Penton said. According to group president John DiPaola, the “transition to online information delivery for these two brands is a necessary change to best meet the needs of the industry.”

It wasn’t clear how many layoffs were associated with the closings as a company spokesperson declined to comment on “headcount.”

Published continuously since 1877, the print edition of American Machinist carried a monthly frequency while Welding Design & Fabrication published six times annually. The American Machinist Web site averages 90,000 monthly pageviews and 46,000 unique visitors, the company said. Welding Design & Fabrication’s site gets 1.04 million page views and 87,000 unique visitors per month.

Penton’s manufacturing and supply chain group also publishes several other brands including IndustryWeek, Logistics Today, Forging and Foundry Management & Technology.