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Posted by Randy on December 12, 2008, 9:58 am
Please log in for more thread options wrote:
>
>
>BottleBob wrote:
>>
>>
>> john wrote:
>>
>>> Has anyone had experience with a three flute helical endmill cutting
>>> 1018 steel plate? I have had different opinions on running this
>>> endmill in steel. It seems that the recutting of chips is the biggest
>>> problem. The endmills work great on cast iron as I was told but don't
>>> do a good job in steel. This was only one person's opinion. Has
>>> anyone else had experience with these cutters in steel? I have about
>>> 200 feet of 1"x1.75" slots to cut.
>>
>>
>> John:
>>
>> Many insert endmill manufacturers make "coolant through" designs to
>> help flush chips out of the cut (Mitsubishi, Iscar, etc).
>>
>> Or you might try trochoidal machining the slots with a smaller dia.
>> solid endmill:
>>
>> http://www.youtube.com/watch?v=UO6kkyiUkDc&feature=related
>>
>> I remember someone posted a vid of a deep slot being done wicked
>> fast, can't find it now.
>>
>
>
>Thanks for the reply Bob. I went ahead and ordered a twelve insert
>helical mill with a 1.75 inch reach by 1 inch dia. The thing worked
>great but I had to lower the feed and speed a little because my control
>would not let me go over 100 % on the spindle hp. I was cutting the
>full depth of the cutter at about 70% feed rate and rpm using a full 15
>HP. in A36 plate. The cutter held up fine and saved me a lot of time.
>The machining was done on a Monarch vmc150 with GE 2000 control. The
>machine had through the spindle coolant but it was partially removed
>before I got the machine. One of these days I will get the missing
>parts and replace them. The plumbing and pump are still there but the
>rotary joint and some other parts are missing.
>
>
>John
I don't have coolant through, but would it do anything in this case?
if you are fully through the part, coolant out the bottom of the tool
would do nothing. right?
do some tools spray sideways?
Thank You,
Randy
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> 1018 steel plate? I have had different opinions on running this endmill
> in steel. It seems that the recutting of chips is the biggest problem.
> The endmills work great on cast iron as I was told but don't do a good
> job in steel. This was only one person's opinion. Has anyone else had
> experience with these cutters in steel? I have about 200 feet of
> 1"x1.75" slots to cut.