This 1 pc 1/4 in male needle valve type oil cup with a 400 ml capacity is a sight gravity drip feed oiler designed for machine tools such as lathes and mills. It provides a simple, controlled way to apply lubrication exactly where it is needed, helping to protect bearings, slides and gears during operation. Key benefits Precise, adjustable lubrication: The needle valve lets you control the drip rate for steady, predictable lubrication throughout your cut or drill cycle. Reduced maintenance and waste: Gravity fed design delivers lubricant only as needed, minimizing oil waste and over oiling. Easy monitoring and refilling: The sight/seethrough oil cup allows quick level checks, and the 400 ml capacity reduces frequent refills during long runs. Versatile mounting option: The 1/4 in male thread provides broad compatibility with common machine tool oiling points and mounts. Key attributes Functionality: Gravity drip feed oiler with needle valve for precise flow control; sighted oil cup for level monitoring. Compatibility: 1/4 in male thread for mounting to lathes, mills and other machine tools with corresponding oil ports. Size and capacity: 400 ml oil cup capacity for longer operation between refills. Performance: Gravityfed delivery supports steady lubrication during operation, with adjustable drip to suit cutting speed and load. Design intent: Sight and gravity fed lubrication designed to provide reliable oil delivery to bearings, ways and other moving parts. Durability and use: Built to function as a compact, easy to install lubrication solution for machine tools. Two to three use cases Lathe applications: Install above the work area to continuously lubricate spindle bearings and cross feed screws during turning, reducing wear and improving surface finish. Milling operations: Use to lubricate ways, table slides, and cutter bearings during heavy milling, helping maintain accuracy and extend tool life. Drill presses and grinders: Apply steady lubrication to spindle bearings and gear trains, aiding smooth operation and reducing heat buildup in long runs. How to use and install Mount the unit using the 1/4 in male thread on compatible oiling points or brackets specified by your machine tool. Fill the oil cup to capacity (400 ml) and visually verify the oil level through the sight window. Adjust the needle valve to obtain the desired drip rate for your operation and material. During use, monitor the oil level and refill as needed to maintain continuous lubrication. Maintenance and care Periodically check the sight window to ensure adequate oil is available for ongoing operations. Refill with the proper lubricant as needed to maintain consistent drip performance. Clean the oil cup and valve area during routine maintenance to prevent clogs and ensure smooth operation. This oil cup and gravity drip oiler is a practical, straightforward solution for maintaining consistent lubrication on machine tools such as lathes and milling machines, with a clear sight view, a 400 ml capacity, and precise flow control through the needle valve.