By continuing to use this site, you agree to our use of cookies. Find out more

Member postings for Russell Eberhardt

Here is a list of all the postings Russell Eberhardt has made in our forums. Click on a thread name to jump to the thread.

<< First < Prev 135 136 137 138 139 140
Thread: 15-day Skeleton Timepiece
26/01/2012 19:58:27
Hi John,
 
Thanks for that.
 
Perhaps a silly question but:
I had a problem with a clock I repaired where I re-bushed a couple of pivot holes. It would run OK for a few days, then loose half an hour the next day, then run OK again. I found the problem to be that I had made the pivot holes too sharp on the inside edge and the pivots had a significantly rounded corner at the shoulder. This occasionally caused things to stick.
Would you recommend an undercut on the shoulder of thee pivot, making polishing difficult or a slight countersink on the inside edge of the holes?
 
Russell.
25/01/2012 20:47:20
Morgens,
 
It's looking good so far.
 
John,
 
The drill sizes I came up with are the closest I could find to the decimal dimensions in the article. The metric ones are closer than the nearest number drills. Of course, as you say, it doesn't really matter as the parts should be made to fit.
 
A question when it comes to the pivot holes in the frames: I guess the holes are drilled to the pivot diameters and then opened out with a broach. My question is how much should they be opened? I have seen books recommending that the arbors should be able to tilt by about 15 deg. but the frame thickness must affect the amount of tilt for a given clearance. What would you recommend?
 
Russell.
23/01/2012 10:46:15
After several years of model engineering and as my grandfather, great grandfather, and great great grandfather were all watch and clock makers I have decided to make my own clock.
 
I have chosen John Parslow's skeleton clock as it is described as being suitable for beginners to clockmaking and looks nice.
 
Having started it I have found that he assumes rather a lot of clockmaking knowledge so have been reading up on techniques and nomenclature. I have also found quite a few errors in the articles (some, but not all, of which were corrected in later articles) so I will note them here in case it helps anyone else:
 
1. The material list omits the brass for the minute wheel. This should be 1.5 in Dia. x 3/32.
 
2. The 4 mm winding key specified will not fit on the 0.18 AF end of the barrel arbor. The correct key is 4.5 mm.
 
3. The suspension spring should be part no. S5516.
 
4. The mainspring should be part no. 0321 204515.
 
5. He gives some rather odd dimensions for the bores of the wheel collets and pinions. I'm using the following drill sizes:
0.78 2 mm.
0.85 #44
0.112 #33
0.118 3 mm.
 
That's all for now - back to the workshop.
 
Russell.
Thread: Beginners first simple clock kit / plans
23/01/2012 10:19:37
Hi Chris,
 
It depends on your skill level. Some of the clocks intended for beginners by John Wilding are good and have pretty detailed instructions in his ME articles (reprinted as books).  Have a look at Ian Cobb's website here for the books and materials and, if you need them, pre-cut wheels.
 
I have just started John Parslow's 15-day Skeleton Clock which was described in ME as a simple beginner's clock and serialised in ME in 2008. Have a look at it on Digital Editions if you are a subscriber. However, although it is described as a beginner's clock, the building instructions assume quite a bit of knowledge and there are qute a few errors.
 
Russell.

Edited By russell eberhardt on 23/01/2012 10:23:03

Edited By russell eberhardt on 23/01/2012 10:23:28

Thread: Rob Roy
22/01/2012 14:05:01
It's to allow the collection of steam well above the water level in the boiler. A pipe sticks up into the dome to collect (reasonably) dry steam for the cykinders.
 
Russell.
<< First < Prev 135 136 137 138 139 140
Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Sign up to our Newsletter

Sign up to our newsletter and get a free digital issue.

You can unsubscribe at anytime. View our privacy policy at www.mortons.co.uk/privacy

Latest Forum Posts
Support Our Partners
cowells
Sarik
MERIDIENNE EXHIBITIONS LTD
Shopping Partners
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest

 

Donate

donate