Machine Cutting Torches

A machine cutting torch is designed to be mounted on a motorized carriage, cutting table, pipe beveling machine, or shape cutter — not held by hand. The torch body is typically straight (rather than angled like a hand torch), with mounting brackets that accept the carriage clamp. The controls are simplified or remote-operated because the operator is not holding the torch during the cut. Machine torches deliver more consistent, repeatable cut quality than hand cutting because travel speed and torch height are mechanically controlled.

Machine cutting torches are compatible with acetylene, propane, natural gas, and liquid petroleum gas (LPG), depending on the specific torch body and the cutting tips installed. Acetylene provides the highest flame temperature and fastest preheat, making it preferred for production plate cutting. Propane is commonly used on CNC tables and track burners for thicker plate where acetylene consumption costs are high. Confirm which fuel gas your torch series is rated for — mixers and tips are fuel-specific and must match.

Machine torch bodies accept standard mounting hardware: most use a round barrel (typically 1.5 in. or 32 mm diameter) that fits into the carriage clamp of a CNC plasma/oxy-fuel table, portable track burner, or pipe beveling head. Some torches include a front-mounted swivel or tilt mechanism for bevel cutting. When ordering, confirm the barrel diameter and body length against your carriage specifications — an incompatible diameter requires an adapter ring.

Inspect seat surfaces where tips mate to the torch body regularly — nicked or worn seats cause gas leaks and poor flame. Clean preheat holes with appropriate tip cleaners (use the correct size file to avoid enlarging holes). Check hose fittings and torch body connections for leaks with soapy water before each production run. Never use oil or grease near oxygen connections — pure oxygen and hydrocarbons create a fire/explosion hazard. Replace O-rings and valve seats when they show wear.

Stand-off distance (tip to work) for machine oxy-fuel cutting is typically 1/8–3/16 in. (3–5 mm) for most tip sizes on carbon steel up to 2 in. thick. Thicker material may require a slightly greater standoff to avoid tip overheating and to allow proper gas flow dynamics. Excessive standoff widens the kerf and can cause incomplete cutting. Many CNC tables use capacitive height control (CHC) or mechanical followers to maintain consistent torch height automatically.