Three 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”).

Hyster-Yale Materials Handling, Inc. Class A’s (HY) grade is moving up to a B (“buy”) this week from last week’s C (“hold”). In Portfolio Grader’s specific subcategory of Equity, HY also gets an A. For more information, get Portfolio Grader’s complete analysis of HY stock.

This week, The L.S. Starrett Company Class A (SCX) is making solid headway. The company’s rating improves to an A (“strong buy”) from last week’s B (“buy”) rating. L.S. Starrett manufactures products, including tools and blades, for industrial, professional and consumer markets. The stock price has risen 16.9% over the past month, better than the 1.7% decrease the S&P 500 has seen over the same period of time. For more information, get Portfolio Grader’s complete analysis of SCX stock.

American Railcar Industries, Inc. (ARII) boosts its rating from a C to a B this week. American Railcar Industries designs, manufactures, and sells hopper and tank railcars in North America. For more information, get Portfolio Grader’s complete analysis of ARII 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.