The overall ratings of 4 Machinery stocks are down on Portfolio Grader this week. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Crane Co. (CR) experiences a ratings drop this week, going from last week’s C to a D. Crane Co. manufactures engineered industrial products for the aerospace and electronics, engineered materials, merchandising systems, fluid handling, and controls sectors. For more information, get Portfolio Grader’s complete analysis of CR stock.

Colfax Corporation (CFX) is having a tough week. The company’s rating falls from a D to a F. Colfax Corporation is a supplier of a broad range of fluid handling products and technologies. The company also gets F’s in sales growth. For more information, get Portfolio Grader’s complete analysis of CFX stock.

Slipping from a C to a D rating, Eastern Company (EML) takes a hit this week. Eastern Company manufactures and sells industrial hardware, security products and metal products. For more information, get Portfolio Grader’s complete analysis of EML stock.

Westport Innovations Inc. (WPRT) earns a D this week, moving down from last week’s grade of C. Westport Innovations Inc. is engaged in the research, development and marketing of high performance, low-emission engine and fuel injection systems that utilize alternative gaseous fuels such as natural gas, propane or hydrogen. The company also gets F’s in return on equity and free cash flow. For more information, get Portfolio Grader’s complete analysis of WPRT 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.