Gallery, Projects and General > Gallery

Tool post grinder build Clough42 inspired

<< < (3/10) > >>

PekkaNF:
Didn't find ready 40 degree PJ-belt insert and since I don't have CNC I decided to modify 35 degree insert to 40 degree one.

Plan was to mill insert pocket into 20 mm rod.

When 20 mm rod is mounted into ER32 square block it can be easily indexed for 5 and 35 and 40 degree ngles needed to mill the insert pocket and modify the inser by grinding. Very standard machining not much to it. Just many steps and quite a few double test to make sure that didn't cut reverse direction to intent.

Originally I was thinking to use this rod to grind the insert only and keep it round, but the modified insert shorten significantly and I either had to modify good unused shank or modify this grinding fixture to be used in the tool holder too (that was my plan-B. Had to revert to plan-B.

PekkaNF:
The diamond wheel seem to produce fairly rough grinding. In the picture the grind appears even rougher than in reality. I honed the radius to cutting edge of the insert, milled flats to insert holder and made a test drive. Seems to work. Punge cut seemed to pruce easily proper profile. Full profile tool would be a whole more fun.

Now I only need 1,5 mm test pins or good wire to gauge correct depth of the belt grove when making the belt pulley.

I roughed one pulley and it's waiting chucked the gauge wire.

Maybe I need to mount one 12,5 mm travel dial gauge to give exact spacing and calculate table in advance.

Pekka

PekkaNF:
Q: What would be correct grit to touch up carbide inserts? The standard wheel (around #100) seems to produce slightly too coarse grind. I haven't trued or dressed it yet.

I used vacuum/cyclone and filter. I was also wearing a respirator and didn't notice a thing. :lol:

PekkaNF:
Thinking of ordering 340 grit diamond to finish carbide smoother for aluminium.

Managed to make spindle pulley. It's still missing the two grub screws 90 degrees appart.

Ref:



Went pretty well, no hickups. First froove took some time to arrive to correct diameter. Rest were plunge cut to identical reading on the cross slide dial and just checked berore moving to next Z-position.

tom osselton:
A while back I went to get a motor for my Craftex mill and found out the spindles cost about $100.00 it is basically a rebrand of his mill in the videos.

Navigation

[0] Message Index

[#] Next page

[*] Previous page