On 1 August 2017 at 02:54, Kirk Wallace wrote:
> Part of my thinking is that what's the point of having an old car if one
> upgrades all of the parts.
I agree. Hence the acetylene lights and magneto with mica capacitor on
my Ner-a-Car.
I replaced the selenium rectifiers on my lathe when I CNC-e
For something like this; I don't think that anyone would care if you
upgraded it.
But they would care if it died again on the highway.
This is like ignitions.I have several old cars and I frequently
install under cap electronic ignitions.
I know they are there, but no one else does. The c
I rescued (loosely applied term) this compressor as it was being loaded
on a neighbor's truck on its way to the dump:
http://www.wallacecompany.com/machine_shop/Sears_Compressor2/
It seems to be in decent shape except the cylinder bores. The plan is to
re-sleeve the bores using:
http://www.eb
On 08/01/2017 12:41 PM, Kirk Wallace wrote:
I rescued (loosely applied term) this compressor as it was being
loaded on a neighbor's truck on its way to the dump:
http://www.wallacecompany.com/machine_shop/Sears_Compressor2/
It seems to be in decent shape except the cylinder bores. The plan is
On 08/01/2017 10:56 AM, Ed wrote:
First question is: What machinery do you have to work on this?
Vertical mill?
Boring head?
What size head?
Lathe with four jaw?
Etc.
Oops.
Here is my website:
http://wallacecompany.com/machine_shop/index.html
Auto and speed shops use a boring bar on a similar mill or a boring jig.
The boring jigs require the sleeves to be in the block in order to mount
the jig. https://www.youtube.com/watch?v=BMpeo-0Gl9E
I had to do a few sleeves a bit larger than yours (4.5" x 9.75") but I only
had a .001-.002" to re
On 1 August 2017 at 18:41, Kirk Wallace wrote:
> My first thought is to set up a boring bar and do a straight plunge in Z
That is what I would do. But then I have a rather nice boring head.
--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of
To mill a hole more than 4 inches deep would seem to be problematic using an
endmill plus helically interpolated holes are seldom precisely round. Why
wouldn't you use a boring head? The beauty of boring is that it produces a
round hole! The cheapie boring heads are hard to adjust but not too ba
On 1 August 2017 at 19:35, Ken Strauss wrote:
> The beauty of boring is that it produces a
> round hole! The cheapie boring heads are hard to adjust but not too bad if you
> work slowly.
Maybe make a special boring tool from one of these:
http://www.ebay.com/itm/KENNAMETAL-BORING-CARTRIDGE-E102AP
Oops.
Here is my website:
http://wallacecompany.com/machine_shop/index.html
The likely mill would be the Shizuoka:
http://www.wallacecompany.com/machine_shop/Shizuoka/
My Zubal might swing it, but it's not CNC yet:
http://www.wallacecompany.com/cnc_lathe/
A lathe is the most stable, a
Greetings everybody;
One of the things I have noted recently was a correlation between the
thread fit, and a commercial bolt screwed into the hole, and I believe
it has to do with my use of a peck routine to do the tapping, more
pecks=sloppier fit.
My spindle doesn't have enough power to drive
It doesn't answer your question but have you considered using thread forming
taps? Certainly no gullets to fill!
> -Original Message-
> From: Gene Heskett [mailto:ghesk...@shentel.net]
> Sent: Tuesday, August 01, 2017 4:57 PM
> To: Enhanced Machine Controller (EMC)
> Subject: [Emc-users] Q
On 1 August 2017 at 21:56, Gene Heskett wrote:
> I could take the filter out, but I'd have to reduce Pgain by at least 75%
> just to keep it from hammering the gears in the head from the perceived
> errors in the velocity signal caused by a 5% quadrature timing error
> wobble in a 4 step repeatab
You should attempt to mechanically trap the sleeve in the bore.
You can leave a shoulder at the bottom of the bore - press the sleeve into
the bore - and then machine the top of the sleeve flush with the block.
or
you can mill/bore a counter bore at the top of the block - turn the sleeve
to leav
On 1 August 2017 at 22:17, andy pugh wrote:
> (both have
> more than adequate power, though).
(This is my milling spindle at the lowest speed and the VFD cranked
down, it doesn't lack for torque).
https://www.youtube.com/watch?v=thtDRjgbxRE
--
atp
"A motorcycle is a bicycle with a pandemoni
.001 interference per inch of diameter. Leave a step in the bottom. Bore
to size do doubt worry about honing for sleeve. Pack sleeve full of ice
crushed and compacted with a hammer. Place in ziploc bag and fill a
container with crushed ice and rock salt place sleeve/ bag deep in ice/rock
salt. Wa
On Tuesday 01 August 2017 17:14:55 Ken Strauss wrote:
> It doesn't answer your question but have you considered using thread
> forming taps? Certainly no gullets to fill!
True Ken, but what is the difference in required torque? I am afraid that
if I use a peck routine, it might get stuck and the
> -Original Message-
> From: Gene Heskett [mailto:ghesk...@shentel.net]
> Sent: Tuesday, August 01, 2017 7:49 PM
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] Question on Z backlash vs rigid tapping
>
> On Tuesday 01 August 2017 17:14:55 Ken Strauss wrote:
>
> > It doesn'
Good Day All,
The international workshop manual suggests that bore and fit oversize pistons.
We always used cylinder boring bar such as Van Norman .
These boring bars only rotate a cutter at the bottom of the boring bar,
also there is adjustable traveling steadies ( called cats paws ) that s
On Tuesday 01 August 2017 17:17:39 andy pugh wrote:
> On 1 August 2017 at 21:56, Gene Heskett wrote:
> > I could take the filter out, but I'd have to reduce Pgain by at
> > least 75% just to keep it from hammering the gears in the head from
> > the perceived errors in the velocity signal caused b
On Tuesday 01 August 2017 17:19:55 andy pugh wrote:
> On 1 August 2017 at 22:17, andy pugh wrote:
> > (both have
> > more than adequate power, though).
>
> (This is my milling spindle at the lowest speed and the VFD cranked
> down, it doesn't lack for torque).
>
> https://www.youtube.com/watch?v
On Tuesday 01 August 2017 20:33:11 Ken Strauss wrote:
> > -Original Message-
> > From: Gene Heskett [mailto:ghesk...@shentel.net]
> > Sent: Tuesday, August 01, 2017 7:49 PM
> > To: emc-users@lists.sourceforge.net
> > Subject: Re: [Emc-users] Question on Z backlash vs rigid tapping
> >
> >
Have you considered using a larger tap drill? A lesser thread depth makes a
huge reduction in the required tapping torque without significantly reducing
the holding power. Some references
(http://www.tapmatic.com/tapping_questions_torque_vs_thread_strength.ydev
for example) show that a 50% thread r
On 08/01/2017 12:41 PM, Kirk Wallace wrote:
I rescued (loosely applied term) this compressor as it was being
loaded on a neighbor's truck on its way to the dump:
http://www.wallacecompany.com/machine_shop/Sears_Compressor2/
It seems to be in decent shape except the cylinder bores. The plan is
On Tuesday 01 August 2017 23:26:31 Ken Strauss wrote:
> Have you considered using a larger tap drill? A lesser thread depth
> makes a huge reduction in the required tapping torque without
> significantly reducing the holding power. Some references
> (http://www.tapmatic.com/tapping_questions_torqu
From the dept of various information:
https://www.parlec.com/Parlec/media/technical_specs/Tapping-Speeds-Torque-Requirements.pdf?ext=.pdf
http://www.tapmatic.com/tapping_questions_torque_setting_data_for_hss.ydev
Dave
On 08/01/2017 07:34 PM, Gene Heskett wrote:
On Tuesday 01 August 2017 20:33:
On 08/01/2017 08:50 PM, Jon Elson wrote:
...snip
All this work for a 1 HP compressor?
I would think the boring bar can make a much straighter and rounder hole
that orbiting with an end mill. Yes, it is more work to keep setting
the cutter diameter.
I have a soft spot for all machines especia
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