16 Dec
2014
16 Dec
'14
9:03 a.m.
We use Greenlee punches on our assembly floor at work. When I worked out
there one summer during a strike I punched a lot of holes. Usually for
small (1/2, 3/4, 1in conduit) stuff I used the bolt and bearing. I didn't
use the hydraulic accessory until it was 3in or 4in. Sometimes I had to use
multiple punches to get a hole big enough for the larger bolts. Step drill
to get a rough hole for the smaller punch bolt and then use a punch big
enough for the next bolt.
They usually went through easily as long as the punch was sharp. Its the
initial cut that is hardest to get once the point is through it just slices
easily.
Chuck
Engineer and one time electrical panel builder/strike breaker
On Tue, Dec 16, 2014 at 3:11 AM, David Griffith <dgriffi at cs.csubak.edu>
wrote:
On Mon, 15 Dec 2014, tony duell wrote:
This is rather off-topic, although I will be using said chassis punches
for classic computer restoration
I am thinking of buying some chassis punches, in particular some of the
ones for D connectors (and others).
One brand I can easily get in the UK is Greenlee. Am I right that that is
a respected manufacturer of them? Not cheap, but then I can't afford the
cheap ones.
Also Greenlee do an accesory called the Quick-Draw or something, a
handheld hydraulic device that fits on said punches. It is darn expensive,
but I want to know what advantages it gives. If it is just faster then I am
not interested. If it means I can cut thicker metal then I might be.
Greenlee punches are known for quality. I have a few and am happy with
them.
--
David Griffith
dgriffi at cs.csubak.edu