Search found 16944 matches

by Harold_V
Thu Jan 09, 2003 8:52 pm
Forum: General Discussion
Topic: Grinding Tonite
Replies: 5
Views: 2327

Re: Grinding Tonite

Hey Doozer, Sorry for the belated reply. Somehow I managed to miss your post. After reading your comments, I'm not sure you need any guidance. You took cuts heavier than I would have recommended and got good results, so you must be doing something right, especially when grinding dry. I don't like to...
by Harold_V
Thu Jan 09, 2003 8:12 pm
Forum: General Discussion
Topic: CuBe alloy properties
Replies: 12
Views: 3003

Re: CuBe alloy properties

I've used beryllium copper in many applications, including making springs. It can be difficult to machine, especially reaming operations. I've cut my share of reamers out of a piece of stock, where the reamer seized and couldn't be withdrawn. The material is very ductile, you are correct in that ass...
by Harold_V
Thu Jan 09, 2003 7:21 pm
Forum: Milling Machines
Topic: What's the Proper Tool To Do This on a Bridgeport?
Replies: 11
Views: 2554

Re: What's the Proper Tool To Do This?

Mark, First, you may be confusing the size of a boring head with the head's ability to bore a specific sized hole. There's generally no relationship. A 2" boring head is capable of boring a 6" hole when tooled properly, and a 4" head is likewise capable of boring a very small hole when appropriately...
by Harold_V
Thu Jan 09, 2003 8:30 am
Forum: Casting & Foundry Work
Topic: Cooling Stress...
Replies: 11
Views: 3575

Re: Cooling Stress...

Thanks, Roy. It's nice to get a confirmation of my hunch. It's things like this that I like to know. [img]/ubb/images/graemlins/smile.gif"%20alt="[/img] I guess by now you can see I'm a nut for detail and procedures! [img]/ubb/images/graemlins/blush.gif"%20alt="[/img]

Best regards,

Harold
by Harold_V
Thu Jan 09, 2003 6:08 am
Forum: Milling Machines
Topic: Trepanning tool for Mill.
Replies: 13
Views: 6447

Re: Trepanning tool for Mill.

Those are kind words, Jim! I appreciate your confidence in me and I'll do my best to give good advice. Now if I could just remember where I put it! [img]/ubb/images/graemlins/grin.gif"%20alt="[/img]

Harold
by Harold_V
Wed Jan 08, 2003 11:57 pm
Forum: Casting & Foundry Work
Topic: Cooling Stress...
Replies: 11
Views: 3575

Re: Cooling Stress...

Frank, You commented: I've always chocked this up to the mixed bag of Hard Discs, transmissions, and any other grey alloy I can find. Could this be the extreme cooling... Sort of makes me wonder if it's more a case of iron contamination and other factors, considering how and what you're melting. It'...
by Harold_V
Wed Jan 08, 2003 11:40 pm
Forum: Casting & Foundry Work
Topic: Cooling Stress...
Replies: 11
Views: 3575

Re: Cooling Stress...

Great information, which I have saved to a file. Thanks for your efforts. [img]/ubb/images/graemlins/grin.gif"%20alt="[/img] The thing I most appreciate at this point is your input on cores. I've seen them done by the linseed oil method and had thought that might be a good way to go, but knowing tha...
by Harold_V
Wed Jan 08, 2003 3:26 pm
Forum: Casting & Foundry Work
Topic: Cooling Stress...
Replies: 11
Views: 3575

Re: Cooling Stress...

Frank, While I'm far from an expert, your friend is likely to be right, especially if you are working with metals that are hot short. Had you pulled a piece of brass that soon, it's entirely possible it would crumble. On the other hand, I'm sure there are instances where pulling the part form sand e...
by Harold_V
Wed Jan 08, 2003 12:37 am
Forum: Milling Machines
Topic: Trepanning tool for Mill.
Replies: 13
Views: 6447

Re: Trepanning tool for Mill.

Hi Jim, The Boelube unit works well but I'm not thrilled with the stuff in the air. I've attached a photo of the unit, which is an atomizing affair. I have no memory of what I paid for the atomizing unit, but I do recall that the cost of the Boelube was right at $100/gallon. It does seem to go a lon...
by Harold_V
Tue Jan 07, 2003 7:09 pm
Forum: General Discussion
Topic: Left hand versus right hand endmills
Replies: 37
Views: 9446

Re: Left hand versus right hand endmills

Nah, I don't think so, especially if you have the key in place. I've run my spindle in reverse about as much as I have forward (OK, not quite as much, but quite a bit, like when I'm boring. (Let me rephrase that, some people think I'm always boring. [img]/ubb/images/graemlins/smile.gif"%20alt="[/img...
by Harold_V
Tue Jan 07, 2003 6:49 pm
Forum: Milling Machines
Topic: Trepanning tool for Mill.
Replies: 13
Views: 6447

Re: Trepanning tool for Mill.

Ha! Timing is everything, it appears. [img]/ubb/images/graemlins/smile.gif"%20alt="[/img]

Harold
by Harold_V
Tue Jan 07, 2003 4:28 pm
Forum: Site Software Questions and Answers
Topic: Logging Out
Replies: 11
Views: 10210

Re: Logging Out

Boy, I'm no help then. Mine works fine, though there have been occasions when I go back and have to log in again. Don't have a clue why. Good luck, Gene. I'm sure you'll find the problem. It's a lot more convenient when you don't have to log in each time.

Harold