Round Tablet Compression Tooling — To Key Or Not To Key The Punches

What makes the keying in tablet compression tooling, specifically in tablet punches, so important to the tablet manufacturing processes? Keying is crucial in maintaining alignment with the die bore, especially in situations like double impressions where unkeyed round punches could lead to misaligned impressions on the tablet. It is also vital for multi-tip upper punches to ensure all punch tips align with the die bores. For micro-tablets, a rotating head option can help reduce the significant torque experienced by lower punch tips. This article emphasizes the need to confirm the presence of lower punch guide keyways in your tablet press before selecting a keyed lower punch and determining the key location for it.