Search found 449 matches

by Rick
Mon Jun 01, 2020 1:58 pm
Forum: Casting & Foundry Work
Topic: Permanent mold hot tears
Replies: 2
Views: 43

Re: Permanent mold hot tears

You need someplace for the metal to draw in molten metal as it cools. With you pouring into the thinnest section, that section is cooling/ solidifying fastest and the rest of the part as it cools and shrinks has nowhere to get the extra metal to make up for the shrinking as it cools. If you put the ...
by Rick
Mon Jun 01, 2020 12:00 pm
Forum: Casting & Foundry Work
Topic: Lost wax bronze melting time/temp
Replies: 4
Views: 55

Re: Lost wax bronze melting time/temp

Yes 900F is good for the flask. Seems like you just need to turn the temp up a bit and get your vacuum working. I would use your furnace temp reading as a reference but not rely on it to be what the exact melt temp is. Did you remove the slag and other crap that rises to the top of the melt before y...
by Rick
Mon Jun 01, 2020 10:38 am
Forum: Casting & Foundry Work
Topic: Lost wax bronze melting time/temp
Replies: 4
Views: 55

Re: Lost wax bronze melting time/temp

Do you have a way to measure the temp of the melt? This is the best way to know when to pour. I do not have anyway to do this yet, I just do it by by the highly sophisticated method of "that seems about right". I have a gas furnace so temp control isn't as good as your electric and wouldn't know how...
by Rick
Thu Mar 26, 2020 8:34 am
Forum: General Discussion
Topic: Motorcycle lift manual to air operated
Replies: 9
Views: 2031

Re: Motorcycle lift manual to air operated

The ones I have seen/used the air just takes the place of the hand pump, you still have to use the bleed valve to lower the jack. There is a check valve between the pump and the cylinder, this check valve is bypassed by the bleeder valve to let the cylinder retract.
by Rick
Mon Oct 07, 2019 8:30 am
Forum: General Discussion
Topic: Steel plate identification
Replies: 22
Views: 5242

Re: Steel plate identification

A few years back my Uncle gave me some 1/2" plate (hot rolled , rusting and flame cut edges) and he assumed it was just regular ole A36. After I got it home decided to look at it a bit closer and found some markings under the rust/dust and dirt. Turned out it was 4140, still have it as it wasn't sui...
by Rick
Tue Sep 03, 2019 7:40 pm
Forum: Live Steam
Topic: Piston Ring Port Sizing
Replies: 3
Views: 2669

Re: Piston Ring Post Sizing

Jim
Lima's standards do not have any info on port design.
by Rick
Tue Sep 03, 2019 9:31 am
Forum: Live Steam
Topic: Piston Ring Port Sizing
Replies: 3
Views: 2669

Re: Piston Ring Post Sizing

Jim
In two stroke engines the racers will go with exhaust port widths up to 60-70% of the bore.
I have a copy of Lima's standards, don't know if there is anything in it about this but I will look tonight.
by Rick
Sat Jul 20, 2019 8:39 pm
Forum: Live Steam
Topic: Anyone printing in wax?
Replies: 14
Views: 4528

Re: Anyone printing in wax?

I have bought a spool of thus but haven't had a chance to print. Looks very promising.
https://us.polymaker.com/product/polycast/
by Rick
Thu May 30, 2019 2:30 pm
Forum: Request For Services
Topic: Looking for a mentor and a place to use machines.
Replies: 7
Views: 9768

Re: Looking for a mentor and a place to use machines.

Harold

Your post reminded me of a saying I heard about musicians but it can be applied to any skilled endeavor.


"An amateur musician practices so they can get it right, a professional musician practices so they can't get it wrong"
by Rick
Fri May 10, 2019 3:57 pm
Forum: Live Steam
Topic: ASR Reading T-1 2100 Video Update
Replies: 3
Views: 2292

Re: ASR Reading T-1 2100 Video Update

Harold
The video worked fine for me
by Rick
Tue Apr 23, 2019 8:46 am
Forum: The Junk Drawer
Topic: Backing up computer files
Replies: 27
Views: 12796

Re: Backing up computer files

We were having trouble figuring out what to do with all these photos my wife and daughter and myself were taking with our phones. I went searching and found out about NAS (network attached server). They are not very expensive and have many features that are handy , at least for me. The one I use is ...
by Rick
Sat Apr 13, 2019 7:01 pm
Forum: General Discussion
Topic: Small Diameter Slitting Saw
Replies: 13
Views: 4692

Re: Small Diameter Slitting Saw

Thanks Harold
Yes forgot to mention relief. Some I have done worked without having to relieve others had the be relieved. Just have to try it and go from there.