1. How Does Reciprocating Saw Work?
Yi Le
ME 100

2. Crank Slider Mechanism
Rotating circular crank
Reciprocating slider attached to the crank

3. The Saw Shaft Circular gear as the crank A short slider
An reciprocating arm

4. The Whole Picture
The gear crank and the motor
The saw

5. References
Mastercraft, 14.4 V Cordless Reciprocating Saw Operating Manual.