South Bend Grinding Jig
In this video series Mr. Pete instructs us on how to make a South Bend grinding jig
Click the PDF icon to the left to download the drawing in PDF format of the South Bend Grinding Fixture.. Click the image to the left to download the 3D STEP file of the South Bend Grinding Fixture. Click the ZIP icon to get the drawings and STEP files in one single archinve. A free 3d parametric modelling software called FreeCAD can be downloaded and used for free at freecadweb.org and can be used to view and edit the 3D model. Drawings and 3D Step files are by Daen C. Hendrickson.
|Grinding Jig - Part 1 of 4 - Introduction & Machining the Master Block||Grinding Jig - Part 2 of 4 - Making the Sleeves (Bit Holders)|
|Grinding Jig - Part 3 of 4 - Engraving the Graduations on the Sleeves||Grinding Jig - Part 4 of 4 - Demonstrating its Use (grinding bits)|
In this section, we welcome viewer comments and photos the Grinding Jig you have made. If you wan to submit forthis project, or any other of Mr. Pete's projects, simply contact us via the contact us link above, or email direct to xavier @ gtec.com
Comment From Viewer Pekka
You chose to use the original V-shaped retaining groove in the sleeve instead of Lyle's suggestion for a flat bottomed slot.
As I explained in my comment in part 2 of the video, The purpose of the groove is to both retain the sleeve in place and to force it's shoulder up against the block.
The 1" dimension in the diagram for the block should show the hole for the grub screw offset just enough to have the screw press only on the inside edge of groove to remove the need for precision dimensions. Lyle identifies this as a manufacturing error in part 3, but I believe it to be intentional and correct.
As explained this same feature is used on camera lens T-mounts to sideload the attachments during assembly.