This week, 3 Machinery stocks are improving their overall rating on Portfolio Grader. Each of these rates an “A” (“strong buy”) or “B” overall (“buy”).

This is a strong week for Oshkosh Corp (OSK). The company’s rating climbs to B from the previous week’s C. Oshkosh Corp designs, manufactures and markets fire and emergency apparatuses and specialty commercial and military trucks. The company also gets A’s in earnings revisions and earnings surprise. For more information, get Portfolio Grader’s complete analysis of OSK stock.

Franklin Electric Co., Inc. (FELE) gets a higher grade this week, advancing from a C last week to a B. Franklin Electric Co., Inc. provides consulting, seminars, educational materials, publications, and products designed to make individuals and organizations more effective. The company also gets A’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of FELE stock.

The rating of Dynamic Materials Corporation (BOOM) moves up this week, rising from a C to a B. Dynamic Materials Corporation is an industrial manufacturer that focuses on niche markets related to the building of equipment and materials. The company also gets A’s in earnings surprise. For more information, get Portfolio Grader’s complete analysis of BOOM stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.