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Small brass cutting tip with threaded base and single orifice

Miller-Smith Equipment

Miller-Smith Equipment MC12-2 Cutting Tip 3/4 to 1 In Thick

SKU CH-SVJQ-5S8SX

Acetylene cutting tip for 5/8 to 1 inch steel, MC12 series size 2, one-piece design, 107 to 118 scfh oxygen flow

  • TypeWelding Parts & Supplies
  • Cuts 5/8 to 1 in steel with MC12 size-2 tip
  • Medium preheat flame tuned for acetylene handheld torches
  • Oxygen flow 107-118 scfh cutting, 11 scfh preheat
  • Fuel pressure 10 psig acetylene, oxygen 50-55 psig
  • Fits AC309, CC509P, DG109A, MC505, MC509 attachments

MC12-2 Cutting Tip for Medium Preheat

The MC12-2 is a one-piece acetylene cutting tip designed for hand-held torches. It handles steel from 5/8 in up to 1 in thick with a medium preheat flame. Compatible attachments include AC309, CC509P, DG109A, MC505 and MC509. Fuel pressure is set at 10 psig while oxygen runs at 50 to 55 psig.

Flow rates and attachment fit change the cut

Preheat acetylene flows at 9 scfh and preheat oxygen at 11 scfh. Cutting oxygen ranges from 107 to 118 scfh. The tip mates only with the listed Smith attachments, so the torch head must accept one of those models. Using the specified pressures keeps the flame stable across the thickness range.

Suits fabricators cutting 5/8 to 1 in plate

Welders who need a single tip for that thickness band on acetylene will find it matches their torch if the attachment is compatible. Shops running propane or propylene, or cutting thinner sheet or thicker plate, should select a different tip series or size.

Highlights

  • Cuts 5/8 to 1 in steel with MC12 size-2 tip
  • Medium preheat flame tuned for acetylene handheld torches
  • Oxygen flow 107-118 scfh cutting, 11 scfh preheat
  • Fuel pressure 10 psig acetylene, oxygen 50-55 psig
  • Fits AC309, CC509P, DG109A, MC505, MC509 attachments

Specifications

BrandSMITH EQUIPMENT
TypeWelding Parts & Supplies

Questions about this item

How often will the MC12-2 cutting tip need replacing under normal acetylene cutting?

Replace the tip when the orifice wears enough to distort the flame cone or when cut quality drops; frequency depends on hours of use and steel cleanliness, not on a fixed interval.

What limits continuous cutting with this tip before it overheats?

Sustained cutting is limited by the tip body temperature rising above safe handling levels; the one-piece design transfers heat quickly, so pause when the tip becomes too hot to touch.

How much heat and noise does the MC12-2 produce during all-day cutting?

The medium-preheat flame at 9 scfh acetylene and 11 scfh oxygen preheat generates a loud hiss and intense local heat; expect the torch handle to warm steadily during long runs.

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