HM122 & 722 6' 5" Standard Track Extension

This 6' 5" (1.95 m) track extension bolts directly to your existing HM122 & 722 track system, allowing you to mill longer logs without changing your overall setup. With one extension installed, your HM122 can mill logs up to 16' 11" (5.1 m) in length, and multiple extensions can be added on ground-mount setups to increase cut length even further.

The extension uses 1/4" thick precision-machined L-rail that matches the existing track, forming a match-set with the sawhead carriage wheels for smooth, consistent travel during milling. The rails are cross-supported with heavy-duty powder-coated rectangular steel log bunks, keeping the track rigid, square, and properly aligned while spreading log weight over a larger surface to help prevent log marking.

The kit also includes two log supports (short and long) for working with different log sizes and cut heights, along with an additional screw-style log clamp to secure material across the extended cutting length. Installation is straightforward—simply remove the last log bunk from your existing track, attach and square the extension, then reinstall the bunk at the end of the new section. It’s a simple way to expand your milling capacity as your projects grow.