Homemade Tool Post Grinder - part 12 (spindle assembly & machining of tapered bore)

The next natural project for me is to make a tool post grinder to use on my Colchester Student lathe. I also have the need for a cutter grinder and so the thought occurred that perhaps I could design a tool post spindle and drive which could also be part of a cutter grinder. If I had sufficient space in my workshop I probably would have looked for a Clarkson Cutter Grinder to refurbish and focussed instead on making just the tool post grinder. Taking all things into account, designing my own combination machine seemed to be a reasonable proposition. In part 12, I assemble the spindle showing the various steps that are required. The assembled spindle is mounted in the lathe in such a way that the important tapered bore to accept the arbours is machined to be concentric with the bearings. Credits for this go to Professor CH Chaddock who used this technique in his Quorn Cutter Grinder build! There is some discussion about bore dimensions to try to ensure the best possible location of the arbours. With that delicate operation successfully completed attention is turned to the central bolt which is used to hold the arbours in place. This and the 'C' spanner to hold the pulley for disassembly and assembly is completed by the end of the video. 00:00 Introduction to the content of this video 00:27 Preparations for assembly 01:57 Pressing into place parts of the labyrinth seals 03:29 Cleaning the internal components prior to assembly 04:31 Installing the bearings 06:53 Fitting the pulley 08:25 Demonstrating by hand the free running of the spindle 10:00 Drawing showing the spindle nose taper 11:36 Setting up the spindle for boring of the nose taper 14:19 Boring the nose taper 18:49 More details on the design of the nose taper 19:23 Solving a surface finish issue 20:39 Taking a look at the surface finish of the tapered bore 21:14 Bringing the plain bore to final size using a bore gauge and dowel pin 22:43 Visual inspection of completed bore 23:10 Drawing of the bolt 23:27 Screw cutting M7 thread 24:43 Completed bolt and 'C' spanner 25:52 Introduction to next video 26:09 End See also: Part 1 - Making the body of the clamp:    • Homemade Tool Post Grinder - part 1 (spind...   Part 2 - Making the 'yoke' which clamps in the tool post:    • Homemade Tool Post Grinder - part 2 (compl...   Part 3 - Spindle body:    • Homemade Tool Post Grinder - part 3 (spind...   Part 4 - End caps:    • Homemade Tool Post Grinder - part 4 (end c...   Part 5 - Deep hole drilling of spindle:    • Homemade Tool Post Grinder - part 5 (deep ...   Part 6 - Centre turning the high speed spindle:    • Homemade Tool Post Grinder - part 6 (centr...   Part 7 - Completing the spindle:    • Homemade Tool Post Grinder - part 7 (compl...   Part 8 - Bearing preload assembly:    • Homemade Tool Post Grinder - part 8 (beari...   Part 9 - Small pulley with poly v-grooves:    • Homemade Tool Post Grinder - part 9 (small...   Part 10 - Internal keyway cutting:    • Homemade Tool Post Grinder - part 10 (inte...   Part 11 - Changing from lip seals to labyrinth seals:    • Homemade Tool Post Grinder - part 11 (laby...