>"Jim Thompson" <To-Email-Use-The-Envelope-I...@My-Web-Site.com> wrote in >message news:stmoe5prvg2m1hn35ds7qmpj1f8bbtg1ll@4ax.com... >> On Sat, 31 Oct 2009 07:39:26 -0500, John Fields >> <jfie...@austininstruments.com> wrote:
>>>On Sat, 31 Oct 2009 12:29:20 +0530, "pimpom" <pim...@invalid.com> >>>wrote:
>>>>I'm having a hard time finding knockout punches for making 1/2 - >>>>1" (say ~12 to 25mm) holes in sheet metal . The smallest size by >>>>Greenlee is for 1/2-inch conduits with an actual hole diameter of >>>>22.4 mm, and all other sizes are much too big.
>>>>I'm in India where importing anything involves too much hassle, >>>>especially from a remote part of the country. I have a friend in >>>>the US who's coming for a visit in a few weeks and I want to ask >>>>him to bring the punches for me.
>>>>Someone in another newsgroup pointed out Q.Max punches and they >>>>have the size range I need, but they seem to be sold only in the >>>>UK. I have not been able to find out the identity of the >>>>manufacturers. So, could you please answer these questions -
>>>>1. Who makes Q.Max punches? >>>>2. What kind of hassle and customs duty are involved in ordering >>>>such items from the UK to the US? >>>>3. Are there any sources in the US for the sizes I need? They >>>>don't even have to be quite up to Greenlee standard as the >>>>material I work with is mostly 1-2 mm aluminium, with an >>>>occasional 1mm mild steel. >>>>4. Any other suggestions will be appreciated. >>>--- >>>Greenlee makes what you need; they call them 'standard round knockout >>>punches' and you can see them on page 53 of their catalog:
>>>They have lots of distributors here in the US (WW Grainger comes to >>>mind) so your friend should have no trouble finding them.
>>>You may also want to try a step-bit drill; they're pretty handy and >>>less >>>expensive than an array of punches.
>>>JF
>> "Slug-Splitter", eh? That sure would have been nice in my days of >> punching holes for toob sockets ;-)
>> ...Jim Thompson
>Their also almost twice the price of a standard knockout.
>Cheers
The Greenlee products i used worked better, and lasted many times longer than the competitors. Less labor time and lower capital long term tool costs, try that idea. That is why Greenlee is still in business.
"JosephKK"<quiettechb...@yahoo.com> wrote: >On Sat, 31 Oct 2009 14:19:44 -0700, Jim Thompson ><To-Email-Use-The-Envelope-I...@My-Web-Site.com> wrote:
>>On Sat, 31 Oct 2009 17:05:17 -0400, "Michael A. Terrell" >><mike.terr...@earthlink.net> wrote:
>>>Jim Thompson wrote:
>>>> "Slug-Splitter", eh? That sure would have been nice in my days of >>>> punching holes for toob sockets ;-)
>>> In your day, a chassis was chiseled out of stone! ;-)
>>Naaah! They really were _breadboards_ ;-)
>> ...Jim Thompson
>And the enclosures were breadboxes. 8:-))
Not much of a stretch. In my youth, chasses were hard to come by, and expensive. You young guys have probably never seen them, but I built many a circuit in tobacco or candy tins.
...Jim Thompson -- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 |
Obama says, "I AM NOT a cry baby, Fox REALLY IS out to get me!"
>Jim Thompson wrote: >> On Sun, 1 Nov 2009 17:19:35 +0530, "pimpom" >> <pim...@invalid.com> >> wrote:
>>> He was a New Zealander who'd received his Ph.D in the US and >>> was >>> more at home with solid-state devices than with tubes. I was >>> 19, >>> entirely self-taught from the likes of Radiotron Designers's >>> Handbook
>> Mine is 4th Edition, 1953 ;-)
>Same here. I got my own copy in the late 70s through a friend in >the US. It says that it's the 4th edition, 1952 - reproduced >under direction of RCA in April 1953. I had it rebound later and >it's still in very good shape. Still comes in useful for some >things.
How well does it cover the then newest microwave devices like BWOs and TWTs?
<To-Email-Use-The-Envelope-I...@My-Web-Site.com> wrote: >Not much of a stretch. In my youth, chasses were hard to come by, and >expensive. You young guys have probably never seen them, but I built >many a circuit in tobacco or candy tins.
On Sun, 1 Nov 2009 00:07:34 +0530, "pimpom" <pim...@invalid.com> wrote:
>ChrisQ wrote: >> pimpom wrote:
<snip> >Now that you've brought up their name, I looked at their prices >for Q-Max punches and they are much more reasonable. Roughly 50% >more than in the UK, but I guess that's to be expected. I may not >have to impose on my friend in the US after all.
>(Strange though that even when I selected the US, prices are >still given in UKP. Prices for India are given in Indian rupee).
That is straight forward enough, localization can easily be provided by decoding your IP address or what it resolves to with ARP and RARP.
Archimedes' Lever wrote: > On Sat, 07 Nov 2009 08:10:12 -0700, Jim Thompson > <To-Email-Use-The-Envelope-I...@My-Web-Site.com> wrote:
>> Not much of a stretch. In my youth, chasses were hard to come by, and >> expensive. You young guys have probably never seen them, but I built >> many a circuit in tobacco or candy tins.
>Archimedes' Lever wrote: >> On Sat, 07 Nov 2009 08:10:12 -0700, Jim Thompson >> <To-Email-Use-The-Envelope-I...@My-Web-Site.com> wrote:
>>> Not much of a stretch. In my youth, chasses were hard to come by, and >>> expensive. You young guys have probably never seen them, but I built >>> many a circuit in tobacco or candy tins.
Archimedes' Lever wrote: > On Sun, 08 Nov 2009 13:33:01 +0000, Ian Bell <ruffreco...@yahoo.com> > wrote:
>> Archimedes' Lever wrote: >>> On Sat, 07 Nov 2009 08:10:12 -0700, Jim Thompson >>> <To-Email-Use-The-Envelope-I...@My-Web-Site.com> wrote:
>>>> Not much of a stretch. In my youth, chasses were hard to come by, and >>>> expensive. You young guys have probably never seen them, but I built >>>> many a circuit in tobacco or candy tins.
>Archimedes' Lever wrote: >> On Sun, 08 Nov 2009 13:33:01 +0000, Ian Bell <ruffreco...@yahoo.com> >> wrote:
>>> Archimedes' Lever wrote: >>>> On Sat, 07 Nov 2009 08:10:12 -0700, Jim Thompson >>>> <To-Email-Use-The-Envelope-I...@My-Web-Site.com> wrote:
>>>>> Not much of a stretch. In my youth, chasses were hard to come by, and >>>>> expensive. You young guys have probably never seen them, but I built >>>>> many a circuit in tobacco or candy tins.
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