4 Machinery stocks are moving up in their overall rating this week, according to the Portfolio Grader database. Every one of these is graded an “A” (“strong buy”) or “B” overall (“buy”).

The rating of Oshkosh Corp (OSK) moves up this week, rising from a C to a B. 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) boosts its rating from a C to a B this week. 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.

This week, Altra Industrial Motion Corp. (AIMC) pushes up from a C to a B rating. Altra Industrial Motion Corp. designs, produces, and markets a range of mechanical power transmission and motion control products worldwide. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of AIMC stock.

Luxfer Holdings PLC Sponsored ADR (LXFR) earns a B this week, jumping up from last week’s grade of C. Luxfer Holdings PLC Sponsored ADR a materials technology company, engages in the design, manufacture, and supply of materials, components, and gas cylinders. The company also gets A’s in operating margin growth and earnings momentum. For more information, get Portfolio Grader’s complete analysis of LXFR 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.