Background:
I'm building a CNC mill in the spirit of the Swede CNC mill.
For this mill I have 3 project
-1- build a R8 spindle based on the LMS#1407 (new project)
-2- Repair a broken spindle found Triangle Machineryin San jose.
-3- Use a Mori-Seiki tool holder as a mill spindle.
Few days ago I win on eBay a pair of angular contact bearing type BM-J 348 from Norma-hoffman they are ABEC 7 ID= 35mm and OD=72mm, they are magnific.
Now it is time to start to hink about the design the spindle project #1 , the open questions are:
-1- Type of bearing assembly ?(back to back, face to face)
-2- Calculation ? necessary ?
-3- Bearing housing , material (dimension, cylinder ?, box type)
-4- preload adjustement
-5- bearing lubrification
-6- Maintenance
...
..
I'm planning to share my ideas , but I need yours also, so do not hesitate to contribute
Thanks in advance
Michel