A simple jig to allow grinding of four facet tips on drills up to about 6mm (1/4 inch).
The device is a fabricated construction and involves no castings.
The design is based on a design in Model Engineer Magazine from about 1990, adapted to work with my particular grinder and to use materials to hand at the time. ?I do not have a copy of the original article - the drawings were done based on the jig I built and the notes I made in my workshop notebook.
Ian.
Year: 2012
Accessories: Reverse Gear (incomplete)
Future Modifications: Reverse lever and linkage, oil cups, governor.
View attachment Four_Facet_drill_grinding_jig.pdf
The device is a fabricated construction and involves no castings.
The design is based on a design in Model Engineer Magazine from about 1990, adapted to work with my particular grinder and to use materials to hand at the time. ?I do not have a copy of the original article - the drawings were done based on the jig I built and the notes I made in my workshop notebook.
Ian.
Year: 2012
Accessories: Reverse Gear (incomplete)
Future Modifications: Reverse lever and linkage, oil cups, governor.
View attachment Four_Facet_drill_grinding_jig.pdf
