Search found 6679 matches

by GlennW
Fri May 24, 2019 9:11 pm
Forum: Buy, Sell, Trade, Wanted, Free!
Topic: WTS Pratt and Burnerd D1-4 KC15 Chuck with full set of MC collets ****SOLD****
Replies: 6
Views: 3690

Re: WTS Pratt and Burnerd D1-4 KC15 Chuck with full set of MC collets

There is an "eBay Sales" Forum just below this one where you could just post a link to your eBay auction.
by GlennW
Sun May 19, 2019 2:35 pm
Forum: General Discussion
Topic: Balancing grinding wheels- my new page
Replies: 22
Views: 3955

Re: Balancing grinding wheels- my new page

I gave up on it and used a different wheel. I balanced and re-dressed, then balanced and re-dressed again (as re-dressing after balance can alter the balance) and it still left a choppy finish as if it was out of balance. I don't recall if I could still feel any vibration though. It was a 3/4" wide ...
by GlennW
Sun May 19, 2019 7:03 am
Forum: General Discussion
Topic: Balancing grinding wheels- my new page
Replies: 22
Views: 3955

Re: Balancing grinding wheels- my new page

I've got a pretty expensive SG wheel that refuses to work. It made the machine vibrate when I first tried it so I balanced it, and it still leaves a choppy finish.

I finally gave up on it and will use it if I need a roughing wheel.
by GlennW
Sat May 18, 2019 7:30 pm
Forum: The Photo Album
Topic: Amazing machine work
Replies: 15
Views: 5008

Re: Amazing machine work

The Packard wasn't based on the Merlin, it is a Merlin and was built by Packard under license from Rolls Royce to keep up with the high demand. British built aircraft were supplied by Rolls Royce and production built aircraft built on the North American Continent were supplied by Packard. Continenta...
by GlennW
Fri May 17, 2019 6:20 am
Forum: General Discussion
Topic: Making a milling machine riser
Replies: 24
Views: 4715

Re: Making a milling machine riser

There was never a doubt that it would be anything less than perfect!
by GlennW
Thu May 16, 2019 6:37 am
Forum: General Discussion
Topic: Balancing grinding wheels- my new page
Replies: 22
Views: 3955

Re: Balancing grinding wheels- my new page

Saw those, no idea how much they cost. My guess is they could be a bit tricky to adapt the 4-pass technique to, but with some index marks it might not be too difficult. I honestly can't remember as I use them on 8" wheels. The larger 14" wheels I use have wheel adapters with the sliding weights bui...
by GlennW
Wed May 15, 2019 8:38 pm
Forum: General Discussion
Topic: Balancing grinding wheels- my new page
Replies: 22
Views: 3955

Re: Balancing grinding wheels- my new page

Balancing washers.

Sopko part number 00798. Bottom of page.

http://www.wmsopko.com/sopko_092.htm
by GlennW
Mon May 13, 2019 9:02 am
Forum: The Photo Album
Topic: Amazing machine work
Replies: 15
Views: 5008

Re: Amazing machine work

I was helping a guy a while back that was a test lab for hurricane windows and shutters. Re was using a Pratt R-2800 to generate the wind for testing.
by GlennW
Sun May 12, 2019 12:19 pm
Forum: The Photo Album
Topic: Amazing machine work
Replies: 15
Views: 5008

Re: Amazing machine work

Russ Hanscom wrote:
Sat May 11, 2019 9:54 pm
Those look suspiciously like Allison parts!
Packard Merlin.
by GlennW
Fri May 10, 2019 7:46 am
Forum: The Photo Album
Topic: Amazing machine work
Replies: 15
Views: 5008

Amazing machine work

Occasionally I see where someone comments on how machine work was somehow lacking back in the 1930's and 40's or that tolerances were loose since it was difficult to maintain any real accuracy. These are some (yes, just some) of the internal parts from the engines that I work on that were designed a...
by GlennW
Sat May 04, 2019 2:57 pm
Forum: General Discussion
Topic: Milling procedure confirmation
Replies: 20
Views: 4762

Re: Milling procedure confirmation

This should cut down on the "hammering" of the interrupted cut.
RSG.jpg