Gravity-fed oil cup for machine tools with adjustable needle valve and sight window. Provides simple, reliable drip lubrication without pumps or power. Key benefits Precise lubrication: 1/8 inch male needle valve lets you fine-tune the drip rate so oil goes where it is needed without over- or under-lubricating. Instant level check: sight window lets operators verify remaining oil at a glance, reducing downtime and unexpected refills. Low-maintenance supply: gravity-fed design eliminates pumps and power, simplifying installation and lowering maintenance needs. Compact and practical: 16 ml capacity suits short runs and intermittent lubrication tasks while fitting into tight spaces. Secure mounting: standard 1/8 inch male threaded interface for easy installation and compatibility with common lubrication fittings. Key attributes Function: gravity drip-feed oiler with a needle valve for adjustable flow control. Valve: 1/8 inch male needle valve for precise adjustment of drip rate. Connection: 1/8 inch male threaded interface for reliable mounting. Capacity/size: 16 ml oil cup; compact form factor for close-in mounting on machine tools. Visibility: integrated sight window to monitor oil level. Material: not specified in the product description. Performance: steady, gravity-fed lubrication to targeted surfaces without electrical power or pumps. Typical use scenarios Lathe spindle lubrication: mount the cup near the spindle to supply a controlled drip to bearings and mating surfaces, helping reduce wear during operation. Milling machine ways and leadscrews: position the cup to deliver a steady drip to ways or leadscrews for smoother feeds and reduced friction. General workshop lubrication: use on small to midsize machine tools or sliding components that benefit from visible, adjustable, gravity-fed oiling without complex plumbing. Applications For machine tools that require a gravity drip feed oiler with an adjustable needle valve and visible oil level. Ideal where users need simple, low-maintenance lubrication for short runs or intermittent use. Suitable for setups with a standard 1/8 inch male threaded connection, including lathes, mills, and similar equipment.