Chief CMA270 — 1.5" NPT Threaded Pipe Coupler for Projection Columns
The Chief CMA270 is a threaded pipe coupler designed to connect two 1.5" NPT threaded columns together, extending the drop length of ceiling projector mount installations where a single column falls short. It is aimed at AV integrators working with Chief's extensive range of NPT-threaded extension columns and ceiling mounts for projectors and displays. By bridging two columns into a single, continuous run, the CMA270 eliminates the need to source a custom-length column, making it a practical and cost-effective accessory for fine-tuning projector height in classrooms, boardrooms, auditoriums, and other venues.
Universal Compatibility with Chief 1.5" NPT Columns
The CMA270 is engineered specifically for the 1.5" NPT thread standard used across Chief's entire range of fixed and adjustable extension columns. This means the coupler integrates seamlessly with virtually any Chief column in an existing or new installation without requiring adapters or custom fabrication. In practice, it gives installers the freedom to combine any two columns from stock — for example pairing a 30 cm and a 45 cm column to achieve a 75 cm+ drop — rather than waiting for a special-order length. The result is a faster, more flexible installation process with predictable, confirmed compatibility.
226,8 kg Rated Load for Long-Term Reliability
With a weight capacity of 226,8 kg, the CMA270 meets or exceeds the structural rating of virtually all Chief 1.5" NPT columns and extension accessories. This means the coupler is never the weakest point in the chain: the full weight capacity of the column system is preserved end-to-end. For venues with heavy projectors or complex rigging, this gives both the integrator and the end user confidence that the installation is structurally sound over its full service life. The UL listing further confirms the product has been independently tested and meets recognised safety standards — an important requirement for commercial and institutional projects.
Set-Screw Lock for Connection Security
Two set screws are included and pre-positioned in the coupler body to lock both column threads once assembled. This prevents the connection from loosening over time due to vibration or thermal cycling — a real concern in environments with HVAC-driven air movement or in spaces subject to building vibration. Once tightened, the joint behaves as a single rigid element, which maintains projector alignment and avoids the drift or image shift that can occur when connection points work loose. The set-screw design also allows the joint to be released and repositioned during installation, giving installers the ability to adjust column orientation before final lock-down.
