0558011005 - ESAB R-720 Regulator Pressure Adjustment Knob

Don't Let a Broken Knob Slow You Down

We've all been there: you're setting up for a critical cut or weld, you reach for the regulator to dial in your pressure, and the knob is either cracked, spinning freely, or missing entirely. Trying to adjust a regulator with a pair of pliers is not only frustrating and unprofessional, but it can also damage the brass adjusting screw, turning a cheap repair into an expensive replacement. The ESAB 0558011005 Replacement Knob is the exact part you need to fix your trusted ESAB R-720 regulator and get back to work properly.

The ESAB R-720 is a workhorse in the industry, built to handle high flows and tough jobs. It deserves better than a makeshift fix. This replacement knob is the genuine article—the same one that came on the regulator when it was new. It features the classic ESAB design with deep ridges that provide excellent grip, allowing you to dial in your PSI smoothly and accurately, even if you have greasy hands or are wearing thick leather welding gloves. The tactile feel of a proper knob is essential for making those micro-adjustments that dial in a perfect neutral flame or the exact shielding gas flow rate.

Installation is straightforward, designed to get your gear back in service immediately. Made from tough, impact-resistant plastic, this knob is built to survive the inevitable knocks and drops that happen in a busy shop or on a field site. It resists becoming brittle over time and stands up to the heat and grime of the welding environment. Don't compromise your safety or your weld quality by struggling with broken equipment.

Keep your station running smooth and your settings precise. If your R-720 has seen better days, a fresh adjustment knob is one of the easiest and most satisfying repairs you can make. It restores the look and feel of your regulator, ensuring you have total control over your gas delivery every time you strike an arc or light a torch.