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Brass cutting tip size 3 for acetylene handheld torch, one-piece design

Miller-Smith Equipment

Miller-Smith Equipment MC12-3 Cutting Tip 1.5-2 in Thick

SKU CH-GQ3A-PDRM8

Acetylene cutting tip for handheld torches, handles 1.5 to 2 in steel with medium preheat flame

  • TypeWelding Parts & Supplies
  • Cuts 1.5 to 2 in thick material with Tip Size 3
  • Medium preheat flame suits acetylene fuel at 10 psig pressure
  • Preheat oxygen flow at 12 scfh supports stable cutting
  • Cutting oxygen flow 170 to 181 scfh delivers heavy-duty performance
  • Fits AC309 CC509P DG109A MC505 MC509 compatible cutting attachments

Cutting Tip for 1.5-2 in Steel

The Smith Equipment MC12-3 is a one-piece acetylene cutting tip designed for handheld torches. It covers plate thicknesses from 1 1/2 in to 2 in using a medium preheat flame. Compatible attachments include the AC309, CC509P, DG109A, MC505 and MC509.

Preheat and Cutting Flow Rates

Preheat operation uses 10 scfh of acetylene at 10 psig and 12 scfh of oxygen. Cutting oxygen flows between 170 and 181 scfh. These rates define the gas consumption during normal hand-held cutting work.

Sustained Cutting Behaviour

The tip maintains the specified cutting oxygen range of 170 to 181 scfh throughout a continuous cut. Fuel and preheat oxygen pressures remain steady at the rated values. It is not intended for plate thinner than 1 1/2 in or thicker than 2 in.

Highlights

  • Cuts 1.5 to 2 in thick material with Tip Size 3
  • Medium preheat flame suits acetylene fuel at 10 psig pressure
  • Preheat oxygen flow at 12 scfh supports stable cutting
  • Cutting oxygen flow 170 to 181 scfh delivers heavy-duty performance
  • Fits AC309 CC509P DG109A MC505 MC509 compatible cutting attachments

Specifications

TypeWelding Parts & Supplies
BrandSMITH EQUIPMENT

Questions about this item

How do I install the MC12-3 tip on a compatible torch, and which step is often missed?

Thread the tip onto a Smith AC309, CC509P, DG109A, MC505 or MC509 cutting attachment and set acetylene pressure to 10 psig; the step people skip is verifying both preheat and cutting oxygen pressures before lighting.

What maintenance or replacement will the MC12-3 cutting tip need over time?

The one-piece tip requires periodic orifice cleaning and should be replaced when the preheat flames become uneven or the cutting oxygen stream loses its sharp, straight profile.

What limit appears first during a long cut with the MC12-3 tip?

Sustained cutting at 170 to 181 scfh oxygen flow causes the tip to heat up, so thermal distortion of the orifice is the first limit that degrades cut quality.

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