.125 alum. sheet

[hoa75nguyen]

Hi Everyone,

I am cutting a profile on alum. sheet .125 thickness. Just wonder how long and thinkness of the tags to leave it.

Thank you

[#Rekd™]

Depends how large the part is, the shape and how you are holding it down.

Post a file and someone will comment.

[RaiderX]

I do a lot of flat pattern nesting in various thickness (.06 to .25). a lot of times it works to leave .01 by .5 tabs but as Rekd stated it really depends on a lot of other things. the .25 I cut aggressive until part off then finness it a bit to make sure the part does not fly before its time (aerospace work).

 

[jlw™]

I would leave half inch long tabs every half inch at full thickness.

Just kidding, I would be trying to rig up some kind of vacuum fixture and profile complete.  You'd be amazed how affordable a vacuum fixture can be.

[Bubba85]

+1 to a vacuum fixture. Also try looking into Vilmill, it's a .010 thick heat activated adhesive fabric to help hold small parts in place on vacuum fixtures. In theory you cut through the alum. but not through the fabric underneath. 

[Matthew Hajicek - Singularity]

Where do you get Vilmill?

[CEMENTHEAD]

double sided tape,  high rpm 1/8 max dia em, ramp down finish size profile to .002 off floor, NO TABS, part will pull off excess frame remaining on tape. easy cleanup with an exacto.  also . I'll go half way, break all edges then finish thru. machined breaks are 1000x prettier than dotco. ^^ 

[hoa75nguyen]

Thank you for all the tips! I used RaiderX advice, .5 with .01 work like a charm

[Bubba85]

16 hours ago, Matthew Hajicek™ - Conventus said:

Where do you get Vilmill?

http://stackmaster.com/ 

Here is a link. It's a neat product, saves us a lot of time grinding off tabs. We do a lot of alum. sheet aircraft work.