What type oil is used in the gearcase of a model 548 worm drive jig saw? Support April 07, 2021 18:25 Updated Use 90Wgear oil in the gearcase. Fill per instructions in your instruction manual. Related articles What is the maximum recommended thickness of metal that can be cut with the PC3012? How to check the repair status of my tool How do I tighten the blade height adjustment? 3812 bench table saw How is the laser on the 3700L powered? Is there a wait time between shots? Comments 0 comments Please sign in to leave a comment.