FILENAMES: jsaw3.jpg DESCRIPTION: This is a photo of a die filer made from a jig saw. Posted by Kenneth Knaell . Kenneth provided the following description: ================================================================= There are three parts to identify in the photo. 1. The clamp/umbrella - this is the object on the left with the red felt showing around its edge. It has a 1/4-28 bolt going into the 1/2" hole. The hole passes over the 1/2" oscillating plunger. An umbella to keep chips from directly falling upon the plunger bearing is soft soldered to the steel clamping body. The umbrella is soldered up from "tin can" stock and the rear of the umbrella is covered with felt to ride against the vertical surface of the rocker shaped table holder underneath my right hand in the right background of the picture. 2. The vertical oscillating plunger - this is the hollow tube with hole in front in the lower right of the picture. This is really a piece of 1/2" drill rod bored out to allow a 3/8" tool holder to enter it. The 1/4-28 screw mentioned above passes through the hole in front and locks the 3/8" tool holder in the plunger. 3. The 3/8" tool holder - this is the object with four setscrews being held in the right of the picture. This is hardened and made from 1/2" drill rod. It is 1/2" in diameter at the top and turned down to 3/8" in order to enter the vertical plunger. It has a flat on the front of the 3/8" section to prevent burrs from the tightening screw from scraping the inside of the 3/8" hole in the vertical plunger. The umbrella was made part of the clamp because of the limited space underneath the jigsaw table. This robust clamp sllows much greater clamping force to be applied to the 3/8" tool holder than would be possible if the clamp screw were threaded directly into the vertical plunger as is designed into the MLA die filer I believe. The 3/8" hole in the vertical plunger allows a more robust mount than the 1/4" hole used in the MLA plunger. The seperate tool holder allows many different types of implements to be quickley interchanged into the vertical plunger. In addition a coller with two 2-56 clamp screws can be identified at the lower part of the vertical plunger which lies against the main casting of the jig-saw. Underneath this coller is an oil soaked felt washer which wipes the vertical plunger. The 2-56 clamp screws bear lightly against a 1-1/8" long porous bronze bushing which serves as the upper bearing surface for the vertical plunger and keep the coller from being lifted up from the casting.