Homemade Tool Post Grinder - part 6 (centre-turning the high speed spindle)

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 6, I start the external work on the all important spindle made from EN19T. All the work today is undertaken between centres to ensure concentricity and repeatability as I change the work end for end and remove occasionally to check progress and measure lengths. Trial fitting of the lip seal on the spindle indicates that friction may be excessive at the higher speeds. This is something to monitor and may require me to consider an alternative sealing methos such as labyrinth seals. Once the assembly is complete I will be able to measure the torque required to overcome seal friction and calculate the power consumption and so heat input. That may enable me to make a final decision about whether to change the design. Watch this space! 00:00 Introduction to the content of this video 00:59 Using the arbour press to remove the bearing from the body 01:52 Accurately measuring the spindle blank and body lengths 04:30 Facing the spindle blank to final length 06:17 Re-machining the centre & setting up for between centres turning 09:01 Roughing out the external profile 09:24 Changing to carbide insert tooling for faster metal removal 10:32 Adjusting the tailstock alignment to ensure parallel turning 13:21 Continuing roughing cuts but taking care because work is getting slender 14:06 Marking out positions of shoulders 14:17 Relieving centre section to aid bearing installation 14:48 Rough turning pulley section of spindle 15:12 The work is now swapped end for end to finish turn first bearing seat 20:12 Turning the lip seal journal 21:02 Trial fitting of the lip seal 22:03 Concern that the lip seal may be too tight 23:02 Reducing lip seal journal diameter 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 ...