Miller-Smith Equipment ST603 Heating Tip Size 71 750 BTU

Miller-Smith ST603 Heating Tip for Acetylene Torches

The Miller-Smith ST603 is a heating tip built for the ST600 series and WH200A torch models. It operates on acetylene fuel and delivers a multi-flame pattern rated at 750 BTU per hour at size 71. The tip uses a tube-and-head design with a number 56 drill size. It is intended for heating applications in metalworking and fabrication shops.

Tube-and-Head Build with Defined Flow Limits

The tip construction uses a tube-and-head layout that threads onto compatible Smith torches including the SW1, SW1A, SW1B, WH200 and WH200A models. Fuel and oxygen flow rates each top out at 50 scfh with a minimum fuel flow of zero. These fixed limits mean the operator must match regulator settings to the tip ratings rather than adjusting freely. The multi-flame flame type spreads heat across a broader area than a single-jet tip.

Replaces Worn ST600 Series Tips for Consistent

This tip replaces a worn or damaged ST600 series heating tip when flame quality drops or flow becomes irregular. The jump is worth it when the existing tip no longer holds the 750 BTU rating at size 71 or when the drill size 56 orifice shows erosion. It is not suited for cutting tasks or for torches outside the listed WH200A and SW1 families. California Proposition 65 warnings apply for cancer and reproductive harm.