K870 - Reconditioned Lincoln Electric K870 Foot Amptrol - 25ft, 6-Pin

Reconditioned Lincoln Electric K870 Foot Amptrol

The Lincoln Electric K870 Foot Amptrol is a staple in the welding industry, known for its durability and precise control over TIG welding amperage. This reconditioned unit (Internal SKU: K870REC) offers the same robust functionality as a new model but at a more accessible price point, having been inspected to ensure it meets operational standards. The device connects to compatible power sources via a heavy-duty 25-foot (7.6 meter) cable equipped with a standard 6-pin Amphenol connector, allowing the welder significant freedom of movement around large assemblies or fixtures.

Operational Mechanics

The K870 is designed for intuitive operation. The welder simply depresses the pedal to initiate the arc and increase the welding current. The further the pedal is depressed, the higher the amperage, up to the maximum setting established on the power source. This variable control is critical for TIG welding, where heat input must be modulated dynamically to prevent burn-through on thin materials or to crater-fill at the end of a weld. Upon fully raising the pedal, the arc is extinguished, and the machine's Afterflow cycle is automatically triggered to shield the tungsten and the weld pool as they cool.

Compatibility and Specifications

This foot control is engineered for a wide range of Lincoln Electric power sources. It is compatible with machines such as the PowerMIG 210, Square Wave TIG 175, 200, and 205, as well as industrial units like the Invertec V160-T, V205-T (AC/DC and DC), V275-S, and V350-Pro. It also supports the Precision TIG series (225, 275, 375) and the Flextec 450. The unit weighs approximately 6 lbs (2.7 kg) and measures 4.5" x 12.25" x 10.38", providing a stable base that resists sliding on shop floors. An optional heel rest is included to reduce ankle fatigue during extended use.