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Spear Basics
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The most extensive keg spear portfolio on the web! Micro Matic offers a full selection of spear systems designed for safe, reliable filling and dispensing. Choosing the right spear is key to ensuring product quality, operational efficiency, and compatibility across your draft setup.
Spear Systems and Common Neck Types →
Depending on the market region, the chart below indicates the relevant neck types per spear System.
Choosing Kegs and Spear Systems →
Choosing the right kegs and spear system is about far more than size or price—it’s a strategic decision that impacts compatibility, efficiency, maintenance, and ultimately your ability to sell and distribute your product. From aligning with market expectations to ensuring proper keg design, headspace, and technical compatibility between kegs, necks, and spears, every detail matters to avoid costly mistakes and operational friction.
Dive deeper to explore the key considerations that will help you make the right choice from the start.
Keg and Spear Safety, Reliability, Product QA/QC Considerations →
Keg and spear systems are engineered for safety and reliability—but only when handled, maintained, and specified correctly. From proper PPE and handling practices to strict use of OEM parts, routine maintenance cycles, and adherence to pressure limits, every step plays a role in protecting both people and product quality.
Add in built-in safety features like pressure-relief valves and rupture discs, and it becomes clear: understanding these systems isn’t optional—it’s essential. Explore the full guide to ensure your operations stay safe, compliant, and consistent.
Neck Types Overview →
Keg neck types may look similar at a glance, but their differences have major implications for safety, compatibility, and day-to-day operations. From the widely used drop-in (2-ear) and SOS bayonet designs to threaded variants, each comes with its own requirements for fit, tooling, and maintenance—especially given the lack of global standardization across manufacturers.
Understanding these nuances is essential to avoid mismatches, ensure safe handling, and keep your keg fleet running smoothly—so it’s worth taking a closer look before making decisions.
D SYSTEM SPEAR
The D System is a “Well type” spear, and the differences between it and S System spears are explained in section D, above. Internally, D System spears match M System, with a CO2 spring on a floating downtube, and a dedicated beer spring under the beer valve, which may be either a ball or poppet.
Therefore, the D System coupler stroke opens first the beer valve, then the CO2 valve, functioning the same as S and M Systems. Since it is a “Well type” spear, it has two inward lugs for engaging the coupler, like S System.
In fact, D and S System couplers look similar and it is common for them to be confused in the market by bartenders, which can cause damage to the spears when the wrong coupler is used.