[time-nuts] Machining some aluminum help!
tmcaldwell at pobox.com
Thu May 18 13:27:59 EDT 2017
Tap Magic for Aluminum will be your best friend for this operation.
I've been using it on some extrusion for a 3D printer project. It makes
an amazing amount of difference.
Good luck with you project.
On 05/18/17 12:18, Pete Lancashire wrote:
> Price sounds reasonable to me.
> Tapping 40 each 4-40's that deep in to a closed hole is the killer. If I
> still had my old Bridgeport J and was NC'ed Your looking at say 1 hour to
> program, 10 minutes to mount in a vice and get aligned, drill 40 each #44
> or #43 holes would be easy, but then slow things down, cross fingers and
> start tapping.
> Doing it by hand, at 1/2 deep those holes better be close to "perfectly"
> On Thu, May 18, 2017 at 9:54 AM, <cdelect at juno.com> wrote:
>> I have a square aluminum tube 5" X 5" with a .25" wall it's 8 1/2" long.
>> I need 20 holes in each end tapped for 4/40 and 1/2" deep.
>> This is for a Rubidium project.
>> The local machine shop want's $360.00!!!!
>> Anyone have a machining setup that could do the work a bit cheaper?
>> If not I'll give it a try myself.
>> Please contact me off list.
>> Corby Dawson
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