Machine fluid from Grainger ensures that your metalworking and machining processes run smoothly. Ensure the quality of your work with a dye penetrant to find surface-breaking defects in nonporous materials. Choose metalworking fluids that cool and lubricate pieces as they're being machined, ground or milled. Select waterproof and weather-resistant stencil ink that dries quickly on your work without smearing or smudging. Grainger supplies machine fluid and metalworking fluids that keep your machines and projects in top condition.