chase mortise

chase mortise

[′chās ‚mȯrd·əs]
(design engineering)
A mortise with a sloping edge from bottom to surface so that a tenon can be inserted when the outside clearance is small.

chase mortise, pulley mortise

A stub mortise which is larger than the tenon inserted into it; one side of the mortise is sloped, permitting the tenon to be inserted sideways; used where exterior clearance is limited.