... The metal is an off-the-shelf rectangular connector that's intended to go into an injection molded housing that holds it in place. My customer's project...
32484
Corey Renner
corey94945
Mar 5, 2013 1:19 am
I've spent a decent amount of effort trying to bond acetal, nothing that I've tried gives satisfactory results (JB Weld, epoxy, cyanoacrylate, roughing the...
32485
Dana Hague
dana_hague
Mar 5, 2013 2:08 am
What does the OD of the metal part look like? As already pointed out, acetal doesn't bond well to anything. One common way to lock metal inserts in to...
32486
Jerry Durand
jerry_durand...
Mar 5, 2013 2:14 am
... It's a rectangular metal tube made of thin steel (about 0.015") that's been tin plated. Look at something like a USB plug, that's typical of how a lot of...
32487
Curt Wuollet
curtwuollet
Mar 5, 2013 5:30 am
Interesting that this came up. I'm making a new leadscrew nut for my Y axis out of acetal by the thermoforming route. I plan to install it in the carrier with...
32488
Craig E. Johnston
svsequoia_pdx
Mar 5, 2013 8:05 am
I googled "gluing acetyl" and came up with the following link for a product that claims to be one of the few that can bond acetyl to itself or other materials:...
32489
Dana Hague
dana_hague
Mar 5, 2013 11:46 am
You might look into products from "Master Bond"; they have specialized epoxies for bonding a lot of different materials-- even teflon-- to metal. What is...
32490
Paul
tinapalian
Mar 5, 2013 12:41 pm
Try "geocel 2300 " it's a tripolymer sealant used for roofing and general construction ....sold in a caulking tube at lumber yards and roofing supply...
32491
Guenther Paul
paulguenter...
Mar 5, 2013 12:58 pm
Goggle has several products listed for bonding acetal to metal.I would stay away from lumber yard products. One suggestion i will always try to use a...
32492
Curt Wuollet
curtwuollet
Mar 5, 2013 1:41 pm
Actually the plastic does deform. Elastic deformation until the entire thread carries the load. Plastic deformation would require several tons, long after the...
32493
uhmgawa
Mar 5, 2013 1:56 pm
... 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...
