Craftsman 31354406 welding torch Parts

On a Craftsman 31354406 torch, the numbers on the torch tip identify the tip size, which is mainly the orifice size that controls gas flow (especially cutting oxygen). Bigger numbers mean a larger orifice and higher flow for thicker metal; smaller numbers are for thinner material.

How tip numbers relate to cutting performance

Tip size affects how easily you pierce, how clean the kerf is, and how stable the flame stays while cutting.

• Small tip numbers: lower gas flow; best for thin sheet and light plate
• Large tip numbers: higher gas flow; best for thicker steel
• Too small: slow cut, frequent flame-outs, heavy slag
• Too large: wide kerf, excessive heat, more distortion
• Correct size: steady preheat flames and a smooth, consistent cut

Typical tip size ranges (general guide)

Torch tip numbering varies by torch and tip style, but many cutting tips are commonly labeled from very small sizes up through larger sizes.

Tip size (example range)	Best for (typical)	What you’ll notice
000 to 0	Thin metal	Easy control, low heat input
1 to 2	Light to medium plate	Faster cut, stable preheat
3 and up	Thicker plate	High oxygen flow, more heat

Quick checks before you choose a tip

Use these checks to avoid poor cuts and wasted gas:

• Match the tip to metal thickness and the fuel gas you’re using
• Confirm the tip is the correct series/style for your torch head
• Inspect the orifices; replace tips that are out-of-round or damaged
• Clean spatter carefully; don’t enlarge the orifice with hard tools
• Set regulators correctly and verify flow with a test cut

Why it matters

Using the right tip size helps your Craftsman torch cut faster and cleaner, reduces slag and warping, and prevents overheating the tip and torch head.

For a quick safety refresher before testing or troubleshooting electrical components on related equipment, see are diy appliance repairs safe.

Last updated: February 2026

Common cutting torch problems on a Craftsman 31354406 welding torch include poor cut quality, popping/backfiring at the tip, unstable flame, and difficulty lighting or staying lit. In most cases, the root cause is tip condition (dirty, worn, or deformed) or incorrect gas flow and setup.

Most common symptoms and what they usually mean

• Popping or backfiring at the tip: tip is dirty, damaged, or overheated; gas pressures can also be off
• Ragged cut or heavy slag: tip orifices are misshaped/worn, cutting oxygen flow is restricted, or travel speed is wrong
• Flame won’t adjust cleanly: partially plugged tip, loose connections, or incorrect regulator settings
• Torch won’t light or won’t stay lit: low cylinder pressure, restricted hoses, or a leak at a fitting
• Flame “blows off” the tip: excessive gas flow, wrong tip size, or poor tip seating

Quick checks we recommend (safe, practical basics)

• Confirm the tip is the correct size for the metal thickness and fuel gas being used.
• Inspect the tip face and orifices; replace the tip if it is dropped, deformed, or repeatedly cleaned and the holes are no longer round.
• Verify regulator pressures and that valves open smoothly.
• Check for hose kinks, crushed sections, or heat damage.
• Check fittings for leaks using a leak-detection solution; tighten connections as needed.
• Purge lines briefly (per your normal safe practice) to clear mixed gases before lighting.

Tip condition: clean vs replace

Tip condition	What you’ll see	Best fix
Dirty/sooted	Weak or wandering flame	Clean tip properly
Worn/misshaped holes	Poor cutting, popping	Replace tip
Dropped/deformed	Unstable flame, backfire	Replace tip

Why it matters

A cutting torch that pops, backfires, or cuts poorly is usually telling you the flame chemistry or oxygen stream is wrong. Fixing tip condition and gas flow protects the torch, improves cut quality, and reduces wasted consumables.

For electrical checks on related equipment (like a welder power source feeding accessories), we also use a meter-based approach like the steps in how to use a multimeter to test electrical parts video.

Last updated: February 2026

A Craftsman welding torch used with oxygen and fuel gas (like the torch setup commonly associated with model 31354406) is made up of the handle that mixes gases, the cutting or welding attachment, the tip, and the hoses and regulators that control flow. The exact pieces depend on whether you are welding, heating, or cutting.

Main torch components (and what they do)

• Torch handle (mixing handle): Where oxygen and fuel gas mix; usually has control valves.
• Welding/heating attachment: Angled head used with welding or heating tips.
• Cutting attachment: Adds a cutting oxygen lever and uses cutting tips.
• Tip (welding, heating, or cutting tip): Shapes the flame; the most frequently changed part.
• Oxygen and fuel hoses: Carry gases from regulators to the torch.
• Regulators and gauges: Reduce tank pressure and set working pressure.
• Check valves/flashback arrestors (if equipped): Help prevent reverse flow and improve safety.

Welding vs cutting: what changes

Use	Attachment you typically use	Tip style you typically use
Welding/brazing	Welding/heating attachment	Welding/brazing tip
Heating	Welding/heating attachment	Rosebud or heating tip
Cutting	Cutting attachment with lever	Cutting tip

How to identify what you have

• Cutting lever present: You have a cutting attachment.
• Two control valves on the handle: Standard oxygen and fuel adjustment.
• Tip markings and size: Tip number and style determine flame size and gas flow.

Why it matters

Using the correct attachment and tip keeps the flame stable, prevents backfiring, and helps you get clean cuts or consistent welds. It also ensures you match the right consumables when replacing worn tips, hoses, or valves.

For general repair safety practices before working on hoses, valves, or connections, use: are diy appliance repairs safe.

Last updated: February 2026

Yes; most cutting-torch problems are repairable by servicing wear parts and sealing surfaces. For the Craftsman 31354406, the repairable items are on the torch handle itself (valves, seats, and seals); cutting-specific parts (cutting lever and cutting tip) are on a separate cutting attachment.

What you can repair on the Craftsman 31354406 torch handle

This model is an oxy-fuel welding torch handle, so repairs focus on gas control and leak prevention.

• Oxygen and fuel valve packing that seeps when the valve is closed
• O-rings and seals at the head or hose connections
• Valve stems, seats, or knobs that bind or will not adjust smoothly
• Thread damage at hose fittings (often fixed by replacing the fitting or seal)
• Internal passages contaminated by dirt (cleaning after safe disassembly)

Quick, safe troubleshooting steps

Shut off both gas cylinders, bleed the lines, and let the handle cool before checking anything.

• Listen and smell for leaks only after the system is pressurized again
• Apply an approved leak-detection solution to joints and valve areas; bubbles pinpoint the leak
• If a valve will not shut off cleanly, the packing or seat needs service
• If flow is weak on one side, check for a clogged inlet screen or debris in the handle
• If you are diagnosing a related ignition or accessory issue, use how to tell if a fuse is blown for basic electrical checks (the torch handle itself is not electrical)

Repair vs replace: what usually makes sense

Symptom	Most likely handle issue	Best next step
Bubbles at valve stem	Worn valve packing	Repack or rebuild valve
Leak at hose connection	Damaged seal or fitting	Replace seal, inspect threads
Hard-to-turn valve	Dry/worn stem or seat	Service valve components
Cracked/heat-warped body	Structural damage	Replace handle assembly

Why it matters

A properly sealed torch handle prevents gas leaks, gives stable flame control, and protects the cutting attachment and regulators from contamination caused by debris moving through the system.

Last updated: February 2026