... That (or knurling) the mating surface with a hot press fit into the acetal is about the only right way to do this. Even acetal/delrin manufacturer's...
32494
Jerry Durand
jerry_durand...
Mar 5, 2013 4:44 pm
I found them last night and sent them an e-mail since they don't list distributors. Wonder how much the stuff costs? In any case, I think I have a couple of...
32495
carlmciver
Mar 5, 2013 6:15 pm
I had a really tough challenge recently where I had to seal up various plastic tubes, mostly exotics, have great electrical resistivity, a little bit soft,...
32496
curtis95033
Mar 5, 2013 6:30 pm
Hot glue is great. I use it for holding electrical connectors in sockets and high vibration locations. A lot of electrical equipment have dabs of hot glue all...
32497
Jerry Durand
jerry_durand...
Mar 5, 2013 6:42 pm
... Back when I worked testing military and aerospace hardware we had to have mating plugs for all sorts of odd connectors. At that time when you needed a...
32498
John
jennasys
Mar 5, 2013 11:57 pm
Hey Rick, I just started going through the theory section in your paper - should the initial calculation for the hypotenuse (center to hex corner) be: 1/8...
32499
Rick Sparber
rgsparber
Mar 6, 2013 2:42 pm
John, Thanks for catching the error. It is now fixed plus I made the equations look a little better: http://rick.sparber.org/dhh.pdf The figures are right,...
32500
John
jennasys
Mar 7, 2013 10:32 am
So instead of doing real work for the past day or so, I went ahead and wrote a program to calculate and visualize the drilled hex holes based on fractional...
32501
Rick Sparber
rgsparber
Mar 7, 2013 11:30 am
John, This is a good start but there is more to it. If the flat to flat distance is ¼”, then using 1/16” holes plus a ¼” center hole is good enough....
32502
John
jennasys
Mar 7, 2013 12:55 pm
Actually, that's why I decided to create the program. On this version I made the following assumptions: 1. Only one hole per corner will be drilled, using...
32503
Rick Sparber
rgsparber
Mar 7, 2013 1:04 pm
John, I found the math daunting. For example, set the flat to flat distance at ½” and drill 1/16” holes at each point. Then drill the center ½” hole....
32504
John
majorobs14
Mar 7, 2013 8:01 pm
I have a ORIGINAL CD-ROM for sale for $60 if anyone is interested. That's $25 less than Amazon's price. Regards, John I have a ORIGINAL CD-ROM for sale for...
32505
John
jennasys
Mar 7, 2013 10:46 pm
Rick, your eye seems to be pretty accurate as the 1/16" hole for the 1/4" hex looks to be about right based on the theory as well. You also make a good point...
32506
Rick Sparber
rgsparber
Mar 7, 2013 11:50 pm
John, You give me too much credit. I chose 1/16” because that was the smallest drill in my fractional drill set and I had spares. I tried to use my CAD...
32507
Jerry Durand
jerry_durand...
Mar 8, 2013 4:01 am
I need to make a custom lathe tool out of some drill rod. That's no problem, the mill will handle that. But it needs to be hardened and stress relieved. So,...
32508
philr_77378
Mar 8, 2013 4:09 am
Your freaking kidding, right? April is still 3+ weeks out. Phil R ________________________________ From: Jerry Durand <jdurand@...> To:...
32509
Jerome Kimberlin
jkimberln
Mar 8, 2013 4:16 am
... The tool is a business expense and the excess heat can be used for the pie. Make sure the pie can be baked at 400 deg F for an hour (or less) since that...
32510
Jerry Durand
jerry_durand...
Mar 8, 2013 4:36 am
... 400 for 15 minutes, 350 for 45. Probably close enough. -- Jerry Durand, Durand Interstellar, Inc. www.interstellar.com tel: +1 408 356-3886, USA toll...
32511
Stan Stocker
stanstocker
Mar 8, 2013 4:30 pm
Hi Jerry, Just polish it up and gently heat well back from the business end. Go slowly, the surface oxide colors will start to run towards the end. When you...
32512
Guenther Paul
paulguenter...
Mar 8, 2013 5:48 pm
Do it just like i tell you and your hardening process will work If you want the drill rod just a little harder heat it to a dark cherry read and drop it in...
32513
joeyfredrick@...
joeyfredrick...
Mar 9, 2013 2:43 am
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=151008994348#ht_1348wt_1398 In good shape. What do you think it's worth?...
32514
Curt Wuollet
curtwuollet
Mar 9, 2013 4:20 am
Since the original was iron and broke, and iron isn't all that great an idea anyway, and since finding a metric replacement or a tap or all other alternatives...
32515
Druid Noibn
druid_noibn
Mar 9, 2013 4:23 am
Hi, The unit looks to be new - that's good news. As for the price - always a tad difficult. New from HF - $1,200. Now add shipping $97. BUT (always...
32516
Curt Wuollet
curtwuollet
Mar 9, 2013 5:05 am
I have the metric version of that machine. I got it for $500 new from Homier. It cost $170 to ship it. But, that was a while ago and the trend has been up for...
32517
Corey Renner
corey94945
Mar 9, 2013 6:24 am
Probably about $800 max, you used to be able to buy it for $650 with a coupon....
32518
joeyfredrick@...
joeyfredrick...
Mar 9, 2013 6:45 am
$650 back then eh? I wonder what gas cost back then :) As long as the ways and table are true (which it looks like from the video) I can tram it with shims and...
32519
Curt Wuollet
curtwuollet
Mar 9, 2013 7:21 am
You got me wondering so I checked, that was September of 2007, I don't know what gas was selling for, but $500 was a good price even then. As I recall HF was ...
32520
Dana Hague
dana_hague
Mar 9, 2013 12:28 pm
... I would say the buy it now price is too much, the starting bid of $500 is not unreasonable, maybe. FWIW, I paid $700 for a a 1986 vintage Jet mill (same...
32521
Guenther Paul
paulguenter...
Mar 9, 2013 1:18 pm
The final price on the machine depends of what one is willing to pay.I bought a machine for what i was willing to give and the seller took my offer. Just...
32522
mlsmith201
Mar 9, 2013 1:27 pm
On sale new for 1200 with the extra tooling. ... From: Guenther Paul To: mill_drill@yahoogroups.com Sent: Saturday, March 09, 2013 8:18 AM Subject: Re:...
