Z-axis Bellows Mount (Part 3): Bottom Bracket
I made the bottom bracket from a single piece of aluminum measuring 75x235x15mm. In this a slot for the Z-axis way is cut and holes are drilled in the bottom for press fitting the magnets that will fix the bracket to the mill base.
Cutting a piece 240mm long from existing bar stock. Even with a brand new bi-metal blade and plenty of WD-40 that is still quite a chore. Time to start saving for that band saw!
Squaring the edges of the sawed of piece. Another downside to using a manual hack saw is that the saw cut tends to be quite at quite an angle from vertical, hence the need to remove a lot of material before the edge is square.
Here I'm using a 10mm 4-flute end mill where the end is damaged. It's certainly not ideal for this type of operation, but squaring ends is purely for cosmetic reasons - the finish and dimensions of the edges are in no way critical - so I decided to save the wear on my other end mills for more critical applications.
In part 4, I'll cover making the bottom bracket ...
blog comments powered by Disqus
- Z-axis Bellows Mount (Part 2): Top Bracket
- DRO Mount (X-axis) on Sieg SX3
- Choosing A Mill
- Z-axis Bellows Mount (Part 1): Introduction
- DRO Mount (Y-axis) on Sieg SX3