Two-Post Deck – What is it in Vaping?

Definition

A Two-Post Deck is the build platform inside an RDA (Rebuildable Dripping Atomiser) or RTA (Rebuildable Tank Atomiser) that contains only two posts—one positive and one negative—for mounting coils. Instead of four or more individual terminals, each post has one large terminal hole (or slot) that accepts both legs of a Coil“>single coil or one leg from each of two coils. By reducing the number of posts, the deck frees up extra space for thicker wires, exotic coils and easier cotton placement, making it a favourite among Australian cloud-chasers and flavour hobbyists who build their own atomisers.

Technical Details

Two-post decks are milled from 304-grade stainless steel and measure 18–25 mm in diameter on most modern atties. Each post is separated by a 4–6 mm PEEK or Delrin insulator to prevent a hard short. Terminal holes are typically 2.5–3.5 mm wide, accommodating parallel clapton, fused clapton or even flat Wire“>ribbon wire without stripping. Because the positive post is isolated, the 510 pin underneath is often extra-long to accept bottom-feeding squonk pins. Variations include:

• Clamp-style: a flat bar and side-screw that traps both legs at once
• Split-post: a single post bisected by a slot for quicker drop-in builds
• Offset-post: posts angled toward the airflow to centre the coil under the top cap

All styles share the same goal—minimising metal mass so wicking channels and airflow remain unobstructed.

Usage & Tips

When installing coils, tighten screws firmly but stop once resistance on the driver increases; over-torquing can snap 2 mm post screws. Align coils parallel to airflow slots and raise them 1–2 mm above the air holes for best flavour and cooler temperature control readings. If you experience an uneven Hit“>throat hit, check that both legs are clamped evenly—uneven tension creates hot spots. Finally, because the deck is open, always pulse coils at 15–20 W, strum and squeeze until they glow evenly before wicking. This prevents hotspots that can burn cotton and potentially vent batteries.

History & Context

The two-post layout emerged in 2014 when Australian and U.S. builders pushed for larger coil clearances in competition RDAs. Early four-post designs restricted airflow to smaller, 1.2 mm terminal holes; machining two beefier posts instantly allowed 24-gauge and twisted builds. Today, the design is standard on squonk-ready RDAs and many top-fill RTAs, bridging the gap between simple single-coil decks and complex post-less systems.