Accessories for chain mortisers

Chains and cutter bars for the chain mortiser, which cuts the deep housings a traditional mortise-and-tenon needs in beams and posts. A mortising set is a matched group — the chain, the guide bar it runs on, and the sprocket that drives it — and the three must go together. Sizes are quoted as mortise width by depth by length, so pick by the joint you're cutting rather than the machine. The bar carries a grease point; a chain run without lubrication blunts fast and eventually binds.