I suspect the Amolco (if it's like the one I used to have) might struggle with a 3/4 tee slot cutter TBH. Why not just have a tapped hole in the (heavy) base that the tee bolt fits, take the nut off first (putting it somewhere safe of course…).

A couple of pieces of rebated steel strip, screwed to piece of suitably sized flat bar would suffice? No need for any precision and a good ‘lead-in’ might be advantageous?

I like the KISS principle.🙂

The M-Type T slot is only 9/16" (.562) wide so should not be a problem.

If its done as Andrew suggests with the centre slot milled a few thou deeper than required, the T cutter is only working on the two edge areas. The central slot is., from memory, about 3/8" wide so a cutter with a good sized shank can be used.  The M-type's T slots are a bit larger than the later ML7s but not much.

Edited By Hopper on 17/04/2021 13:37:22

Chrisv

I believe the cast iron will be easier to cut than the other materials listed, best if you have a vac running to keep the chips clear from the slot to reduce the chance of jamming.

Emgee

Hi
The tee slot cut in this table is 250 grade cast iron it cuts very easily ,you
need to clamp the job down really well and lock all the unused axis ,when i
cut these i always leave about a 1/16 of an inch at the bottom of the slot
for the cutter to work against it takes a lot of the shock of the interrupted cut
away ,the cutter here is from Arc Euro 16mm dia 7mm deep ,obviously the
start needs to be at full depth.If you can the sharp edges of the cutter should be
chamfered to avoid a sharp corner in cast iron, about 1/2 mm is enough.
Power feed and a vacuum cleaner if you have it.

John

Posted by Chris V 17/04/2021 18:21:50
I understand you put paper between the mill bed and lump you are milling to help stop slippage, do you also use paper between clamps and the job ie on the top face?

Chris.

You can do this if you wish ,i use these plate pieces to surround a job
clamped to the mill table ,they are nothing special just rough cut,  used with the normal clamping methods will hold a job securely in
place.
The part in the previous photo had bolt holes on the underside to fix to
the pair of angle plates.As this part was eventually ground on all four sides
it needed to be made and held in this way.

John

Edited By John Pace on 18/04/2021 10:13:54

Hi Chris

Just make them to suit what you are doing ,paper in between the work and the table can be useful to protect an already finished surface.

John