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MMZ_TimeLord · 02-25-2004, 03:10 AM

SysCrusher,

I've found that if I try and do channels with the four flute, it is even worse. Heat just builds up quicker because of the additional friction. The process of predrilling the area to be milled cut down on the chatter and heat CONSIDERABLY!

JFetting,

HSS is okay for me because of two things... no coolant system at present, and my spindle speed doesn't go much higher. This mill tops out at UNDER 1000 RPM. I MAY try a different motor down the line, but not for a while...

I just have to be patient with this and it seems to keep the cutting edges pretty sharp.

Here's today's update...

Cut out the block from the sheet copper... and made a pass on the edges.

Then I pilot drilled and then milled a 0.50" hole for each of the copper tubes.

Here the tubes are being soldered in place...

you must be careful with assemblies like this as you can have the existing tube pieces fall off if you over heat the whole thing... The way around it is to put everything except what you are soldering under water. I will be doing that tomorrow as the "T" joint has a small leak.

The block had NO leaks from the oven proceedure... YAY!

More tomorrow...

02-25-2004, 03:10 AM	#17
MMZ_TimeLord Cooling Savant Join Date: Apr 2003 Location: San Mateo, CA, USA, Earth Posts: 433	SysCrusher, I've found that if I try and do channels with the four flute, it is even worse. Heat just builds up quicker because of the additional friction. The process of predrilling the area to be milled cut down on the chatter and heat CONSIDERABLY! JFetting, HSS is okay for me because of two things... no coolant system at present, and my spindle speed doesn't go much higher. This mill tops out at UNDER 1000 RPM. I MAY try a different motor down the line, but not for a while... I just have to be patient with this and it seems to keep the cutting edges pretty sharp. Here's today's update... Cut out the block from the sheet copper... and made a pass on the edges. Then I pilot drilled and then milled a 0.50" hole for each of the copper tubes. Here the tubes are being soldered in place... you must be careful with assemblies like this as you can have the existing tube pieces fall off if you over heat the whole thing... The way around it is to put everything except what you are soldering under water. I will be doing that tomorrow as the "T" joint has a small leak. The block had NO leaks from the oven proceedure... YAY! More tomorrow... __________________ MMZ>TimeLord "Oooooooooh... that's gonna leave a mark!"