By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Allendale July 23rd

Stuart No. 2 centrifugal pump - machining help needed

All Topics | Latest Posts

Search for:  in Thread Title in  
Manfred Baer04/07/2019 00:07:37
12 forum posts
1 photos

Many years ago I started to machine a set of Stuart No. 2 centrifugal pump castings. Due to a relocation of housing and workshop the project was interruppted for more than a decade. Now and (hopefully) finally I am back on it again. After getting familiar with the drawings (again) and sorting out what is already finished and what has still to be done I stumbled across the impeller. Right now I have no idea how to machine this casting properly. Who can help?

Thanks,

Manfred

Edited By Manfred Baer on 04/07/2019 00:24:16

Maurice04/07/2019 02:01:06
443 forum posts
50 photos

A search through back issues of M.E. Should find a blow by blow description of the making of this pump. I sold a set of castings some years ago, along with the relevant issues of the magazine. Sorry I can't give any clue to the date.

Maurice

Andrew Moyes 104/07/2019 03:06:52
106 forum posts
15 photos

The Stuart no2 pump was the very first thing I machined on my brand new Myford back in the 1970s. I chose it because it looked easy, then struggled with the impeller.

The casting was held in the 4 jaw with the flat back facing the tailstock. It was faced off then the blind hole in the centre was drilled and tapped. The remaining machining was done with it mounted on its shaft which was held in the 3 jaw chuck. So far so good.

My problem was that I couldn't set the top slide over to the very shallow angle needed to machine the front of the impeller. The ML7 won't go beyond 45 degrees. There are various fixes for this which have been covered since then on this forum but having to make extra tooling can be quite off putting to a beginner. I solved it by mounting the vertical slide on the cross slide. The tool was held in a vice bolted to the vertical slide with the tool pointing towards the headstock on the centre line of the lathe but moving vertically up and down. The vertical slide could then be tilted a few degrees from the vertical to achieve the shallow taper. No extra tooling needed.

If yours is a Super 7 or some other make with a different top slide design, you may not have the same problem.

Andrew

Manfred Baer04/07/2019 10:02:53
12 forum posts
1 photos

Many thanks for the ideas and the information given. I have a ML10 lathe and a vertical slide. In so far I'll try the way Andrew suggested.

Manfred

duncan webster04/07/2019 13:22:48
avatar
2201 forum posts
32 photos

Another is to clamp a bar across the bed at the correct angle, arrange a follower on the cross slide to rub against it, then feed the cross slide whilst keeping the follower against the bar with the saddle hand-wheel

John Purdy04/07/2019 16:49:54
avatar
172 forum posts
59 photos

Manfred

The series in ME was by Tubal Cain and was in Vol. 170 and ran from issue #3942 2-15 Apr 1993 to #3950 6-19 Aug 1993.  I've sent you a PM.

John

Edited By John Purdy on 04/07/2019 17:08:22

Edited By John Purdy on 04/07/2019 17:16:20

Manfred Baer16/07/2019 20:48:21
12 forum posts
1 photos

Good news. Due to the help provided I managed successfully to machine most of the impeller casting on my ML10 lathe. The final step to be done is to bringing the impeller fins to right size/angle. Next weekend I'll check if the top slide can be set to the position required. If not, a mixture of a provisional hand-turning rest and a guide bar set at the correct angle (as Duncan stated) could be the solution.

Manfred

Manfred Baer18/07/2019 18:53:33
12 forum posts
1 photos

Even better news tonight. On the ML10 lathe the top slide can be set to required angle for machining the impeller casting without the handles interfering.

img_5570.jpg

So I was able to turn the impeller wings to the proper dimensions in a straight forward and simple machine job. I did‘nt expect that and I‘m quite happy that it worked out so easy.

Manfred

Edited By Manfred Baer on 18/07/2019 19:11:36

All Topics | Latest Posts

Please login to post a reply.

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

Latest Forum Posts
Support Our Partners
Advertise With Us
Warco
ChesterUK
TRANSWAVE Converters
Ausee.com.au
Eccentric July 5 2018
Eccentric Engineering
Meridienne oct 2019
emcomachinetools
Allendale Electronics
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