A blade clamp for use with a power tool having a reciprocating spindle. The blade clamp comprises a cover threaded to the spindle for relative axial movement thereto in response to rotation of the cover relative to the spindle, an ejector pin positioned within the spindle, and a spring coupling the cover and the spindle. The spring biases the cover toward a first rotational position relative to the spindle coinciding with a locked configuration of the blade clamp. The cover is rotatable against the bias of the spring toward a second rotational position relative to the spindle coinciding with an unlocked configuration of the blade clamp. In the unlocked configuration, the ejector pin maintains the cover in the second rotational position. In response to insertion of a blade into the spindle, the blade clamp is automatically adjustable from the unlocked configuration to the locked configuration.
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