Search found 331 matches

by jscarmozza
Wed Mar 02, 2016 8:35 am
Forum: General Discussion
Topic: Gears and gear cutting by Ivan Law
Replies: 29
Views: 5636

Re: Gears and gear cutting by Ivan Law

Thanks Rich, lots of good information!
John
by jscarmozza
Tue Mar 01, 2016 5:48 pm
Forum: General Discussion
Topic: Gears and gear cutting by Ivan Law
Replies: 29
Views: 5636

Re: Gears and gear cutting by Ivan Law

If this thing works, that would be useful information to have. I wonder if there is a way to get that article?
by jscarmozza
Mon Feb 29, 2016 9:00 am
Forum: General Discussion
Topic: Gears and gear cutting by Ivan Law
Replies: 29
Views: 5636

Re: Gears and gear cutting by Ivan Law

Russ, I'll let you know how it turns out, I'm anxious to see the thing work myself! Wsippola, thanks for the heads up on the cutter materials, I was planning on using O1 for both the cutter and buttons. I have the stock on hand so I'll probably use it, but I'll be especially careful with the heat tr...
by jscarmozza
Sun Feb 28, 2016 6:08 pm
Forum: General Discussion
Topic: Gears and gear cutting by Ivan Law
Replies: 29
Views: 5636

Re: Gears and gear cutting by Ivan Law

Thanks Russ, I read the whole book but missed that. Have you made the device? I'm just about done with it and was looking ahead to what was involved in making the form cutter but couldn't figure out what the units were. I figured it might be some dimensionless unit, but had no idea what to do with i...
by jscarmozza
Sun Feb 28, 2016 11:31 am
Forum: General Discussion
Topic: Gears and gear cutting by Ivan Law
Replies: 29
Views: 5636

Gears and gear cutting by Ivan Law

Has anyone made Ivan Law's Eureka form relieving device for making involuted gear cutters? I'm stuck on the dimensions shown in the tables for the 20 and 30 degree form cutters on pages 114 and 115 of Law's book. At first glance I thought the dimensions were inches, but I don't think they are; can s...
by jscarmozza
Thu Feb 18, 2016 6:15 pm
Forum: Riding Scale Railroading
Topic: GG1 in large scale?
Replies: 71
Views: 33145

Re: GG1 in large scale?

Pontiacguy, I loosened the hanger bolts on the chassis connections, I didn't think they were as tight as they turned out to be. That freed the assembly a lot but it still didn't work. I then loosened all of the turn buckles and the rear shoes moved but the front shoes didn't. I hope there isn't anyt...
by jscarmozza
Wed Feb 17, 2016 12:06 pm
Forum: Riding Scale Railroading
Topic: GG1 in large scale?
Replies: 71
Views: 33145

Re: GG1 in large scale?

I completed the brakes on the A-unit of my GG-1 chassis and the entire system is bound up tight. I made each part with a sliding fit, but I'm sure there are misalignments, particularly in the brake shoe hangers. Should there be a little 'jingle' in the hangers and linkage? Your thoughts and advice w...
by jscarmozza
Sun Feb 07, 2016 11:41 am
Forum: General Discussion
Topic: Need help finding a tap
Replies: 13
Views: 2604

Re: Need help finding a tap

Rolland, are you sure of the thread count? I have some obsolete and odd ball taps that I acquired from an old machinist some time ago, I found a few 5/32 x 28 tpi. If this is the correct tap I'll send one to you.
John
by jscarmozza
Tue Nov 17, 2015 9:29 am
Forum: Riding Scale Railroading
Topic: GG1 in large scale?
Replies: 71
Views: 33145

Re: GG1 in large scale?

The chassis on the prototype GG-1 was cast and had reinforcing flanges in high stress areas, in order to duplicate the look on my fabricated chassis, I brazed on steel strips and ground them to match the prototype contours. To fill and smooth out the welds I used metal filled epoxy as Brian suggeste...
by jscarmozza
Sat Nov 14, 2015 7:35 am
Forum: Riding Scale Railroading
Topic: GG1 in large scale?
Replies: 71
Views: 33145

Re: GG1 in large scale?

Thanks for the information and advice Big Dave, after reading your reply I watched a few u tube videos on the subject ...it's not for me. John
by jscarmozza
Fri Nov 13, 2015 9:21 am
Forum: Riding Scale Railroading
Topic: GG1 in large scale?
Replies: 71
Views: 33145

Re: GG1 in large scale?

Mark, I fabricated my chassis and trucks from steel, the biggest problem in doing that is the deformation caused by welding. I made a jig for everything and clamped the parts tight but still got some distortions, however, steel allows you lots of flexibility in construction and is worth the extra ca...
by jscarmozza
Sun Oct 11, 2015 7:35 am
Forum: Casting & Foundry Work
Topic: Use of phosphor copper shot
Replies: 7
Views: 7108

Re: Use of phosphor copper shot

I contacted H. Kramer Co. and asked if phosphor copper was compatible with yellow brass, the technical department responded that it wasn't. Phosphor copper should only be used with red brasses. Thanks again for the contact Ronald. John