Search found 6723 matches

by GlennW
Thu Jan 16, 2020 5:54 pm
Forum: The Photo Album
Topic: Amazing machine work
Replies: 47
Views: 9427

Re: Amazing machine work

About half way through the engine runs. All's perfect so far.

DSC02306.jpg
It looks a lot smaller once it's packed in there...

Propeller diameter is 11' 2".
by GlennW
Mon Jan 13, 2020 10:04 am
Forum: General Discussion
Topic: Keeping drilled holes aligned
Replies: 38
Views: 950

Re: Keeping drilled holes aligned

I don't have the book handy, but one of the things I remember is that they recommended Russ's approach of center drilling all of the holes first, doing one tool change and then doing the next operation. The machine and the operator should be accurate enough and competent enough to relocate the work...
by GlennW
Sat Jan 11, 2020 4:41 pm
Forum: Milling Machines
Topic: older milling machines
Replies: 4
Views: 297

Re: older milling machines

I used to occasionally tinker with a lathe with a Cullman drive on it. I have some pics here somewhere...

These old Dinosaurs are fun to use.
by GlennW
Sat Jan 11, 2020 10:26 am
Forum: General Discussion
Topic: heat shrink fit
Replies: 36
Views: 1163

Re: heat shrink fit

Food for thought is right! Now I've got to figure out how that could happen. Soak time. Happens with reamers as well. The contact area on the part heats up locally while the rest of the part stays ambient. Causes the bore to constrict and give you an oversize hole in the end when reaming materials ...
by GlennW
Thu Jan 09, 2020 8:25 pm
Forum: General Discussion
Topic: heat shrink fit
Replies: 36
Views: 1163

Re: heat shrink fit

Looks nice!
by GlennW
Thu Jan 09, 2020 8:59 am
Forum: General Discussion
Topic: heat shrink fit
Replies: 36
Views: 1163

Re: heat shrink fit

Perhaps trying to achieve too tight a fit than is really necessary, or possibly incorrect measurements? Surface finish is an issue as well. Also not enough heat/insufficient clearance. I you've tried to fit two cold parts together with less than .001" clearance it can be a bit fiddly to get started ...
by GlennW
Mon Dec 30, 2019 4:45 pm
Forum: General Discussion
Topic: Which Configuration Would Be Less Prone to Flex???
Replies: 9
Views: 739

Re: Which Configuration Would Be Less Prone to Flex???

A long time ago I rigged some offshore race boat engines. Used left and right hand spherical rod ends with 5/8" or 3/4" round bar threaded accordingly between them with jam nuts for the adjustment. Nothing ever broke or came loose and they took a pretty good beating. This was in the late 70's and 35...
by GlennW
Mon Dec 30, 2019 11:30 am
Forum: General Discussion
Topic: How to make small duplicate pieces?
Replies: 9
Views: 680

Re: How to make small duplicate pieces?

I use 1/32" thick parallels to locate small parts in a vise. Also a stop on the master jaw as well as an adjustable stop. That way the part sits down against the parallels, and against the jaw stop so it is located in both X and Y axes.
by GlennW
Sun Dec 29, 2019 10:13 pm
Forum: General Discussion
Topic: How to make small duplicate pieces?
Replies: 9
Views: 680

Re: How to make small duplicate pieces?

I'd use 1/4" x 5/8" bar and slot it along it's length accordingly using a slitting/slotting saw to start. Then cut it into about .300" sections and machine them down to 1/4" using a fly cutter or face mill. add the hole, and then round the ends using a 1/8" corner rounding end mill. If they need to...
by GlennW
Sun Dec 29, 2019 7:23 pm
Forum: General Discussion
Topic: How to make small duplicate pieces?
Replies: 9
Views: 680

Re: How to make small duplicate pieces?

I'd use 1/4" x 5/8" bar and slot it along it's length accordingly using a slitting/slotting saw to start. Then cut it into about .300" sections and machine them down to 1/4" using a fly cutter or face mill. add the hole, and then round the ends using a 1/8" corner rounding end mill. If they need to ...
by GlennW
Fri Dec 27, 2019 8:56 am
Forum: General Discussion
Topic: Floating reamer holders
Replies: 21
Views: 1348

Re: Floating reamer holders

Boring will be the most accurate method by comparison.
by GlennW
Mon Dec 23, 2019 4:51 pm
Forum: The Photo Album
Topic: Amazing machine work
Replies: 47
Views: 9427

Re: Amazing machine work

Getting there.
DSC02276.jpg
And a previous one for scale.
P5210174.jpg
Yes, I fly them as well.