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

Member postings for Sam Longley 1

Here is a list of all the postings Sam Longley 1 has made in our forums. Click on a thread name to jump to the thread.

Thread: how to machine an internal curve
06/09/2018 11:09:23
Posted by JasonB on 06/09/2018 10:09:28:

Sam what is the radius on the internal edge? As John says you may be able to use a roundover bit but my only worry is as you said about a form tool in that the width of cut becomes quite wide and you may get chatter or work hardening on the stainless, OK if it were ali or brass as even router cutters will work on that if held in the tool post.

jason

Thanks I have just followed the link, I had looked on other sites & was looking for the wrong thing as I came up with something very £££'s. I could go with that though, as it is not overly expensive & I can hold the part in the mill.

As an aside what RPM would you recommend as a start on 303 stainless using the one with 6mm radius cutter?

Thanks

Still would be interested to know how to grind a cutter for a one off though as one would not want to buy a milling cutter for a single job if one did not need to

Edited By Sam Longley 1 on 06/09/2018 11:10:34

06/09/2018 10:49:33

one of my issues is the clearance on the underside of the cutter. I would use HSS tool steel & can experiment with grinding but the bevels & angles have me a bit stumped.

& to answer query - yes I do have a warco 16 mill but a milling cutter with a round on it might be expensive.

the curve is essentially a full semicircle inside the piece.

I will look for some 303 SS to try it out or I could experiment with some aluminium first as i have a lot of that

I should have put the sizes of the one in the photo

Overall diam is 30mm ,Hole is 12 mm, thickness is 12mm. Outer groove is not a problem as it could possibly be square as the cordage is spliced to it & does not have much friction. The internal part has lots of friction though

Edited By Sam Longley 1 on 06/09/2018 10:57:18

06/09/2018 08:04:22

I want to make some friction rings in stainless steel similar to the one in the picture ( the second picture shows it in a typical use instead of a pulley) .

I know I can buy them ( very expensive) but that is not the point of my question.

Can someone tell me how they would go about making one please. I have the stainless steel bar. the hole in the middle is no more than 15mm diam( prefer 10-12) so I can drill that. But how do I form the inner curve but what shape is the cutter to get the clearance? If the cutter is made as a full form tool I am pretty certain my Warco 250MV will have too much chatter.

Once I have the inner curve I suppose I can grip the item in a shaped mandrel & then deal with the outer internal curve but once again the curve does pose a problem as any form tool will be rather large. It has to be very smooth to allow ropes to pass through under high load without any damage

Any ideas please

 

friction ring 1

friction ring 2

 

Edited By Sam Longley 1 on 06/09/2018 08:16:10

Thread: I've been looking at getting a traction engine.
01/08/2018 21:25:13

The WMV250 regularly stops when taking quite light cuts. The switch often has to be pressed up to 6 times to get it to start. The flexing when things such as parting off has to be seen to be believed- yes everything is tight & I try to keep overhang down. My old Drummond M had better rigidity.

When I had my joinery business I had an old Colchester Master for odd jobs & it was in a totally different class. Unfortunately I was unable to keep it when I sold up & moved away.

The mill flexes all over the place & I find it difficult to mill anything of substance. I have watched Jason's videos & with the cutters he uses & speeds he suggests I cannot match anything like the cuts he does. Vibration is excessive. & the whole thing flexes badly.

01/08/2018 18:08:25
Posted by Bill Chugg on 01/08/2018 13:55:51:

Sam

Thanks reply

Sorry to have caused confusion but I was wondering what equipment Henry had.

Good to have your reply and thanks

I will try again and ask Henry if he can tell us

Thanks.

Bill

Apologies i misread but I can no longer edit the post out

01/08/2018 13:41:41

Bil,l My main hobby is sailing & virtually all summer I am away sailing abroad somewhere so any model engineering I do shares the winter with my other hobby of model RC plane flying. Hence the project has taken some time.

My main work shop is a 22ft * 11 ft purpose built concrete garage & I have Warco WM 250 lathe plus a WM 16 mill with DRO. Both are pretty basic & I kind of regret not getting better quality as it takes so long to do anything due to low power, lack of rigidity, poor electrics etc. I also have a Sealey metal bandsaw plus the usual pillar drill grinder etc in another workshop.

My PYRTE is the first that I have tried & I have made several errors but I have made everything I can up to the boiler which I now need to construct to finish the project. I am doing this last as this is the most expensive & I wanted to make sure that I could do all the cheapest bits first - which I have.

It is still a lot of fun making it & watching it come together though. The designer reckons 140 hours to make & when I have done this I will probably make another. The second could get done in 140 hours because I will not spend time trying to work out what the instructions are trying to say. There are few drawings which is a real pain

.

Edited By Sam Longley 1 on 01/08/2018 13:43:26

30/07/2018 08:22:35
Posted by Bill Chugg on 29/07/2018 08:57:16:

Henry

Try a search on PYRTE traction engine.

You cannot get anything much simpler or cheaper.

1.5 inch scale, 26 inches long, build time approx 100hrs and cost less than £1000.

I would agree with this; apart from the hours to build however!!!!

As a first model I think that it is a great idea because the expense is much lower than many other engines & it allows one to make mistakes (which i have done several- no many- times) without wasting too much money.

The instruction manual is cheap, albeit a bit difficult to understand for a beginner. The final product (I have seen one at one of the model exhibitions) looks fantastic if one's skills are good. You do not need to purchase any castings.

I find it is a great teaching aid & my second one will be much better. I will feel far more confident blowing cash on castings etc for a more detailed example once I know I can get this working. You tube vids show them pulling people along quite easily

Be careful with the Yahoo forum though as there seems to be some sort of virus attached to the forum. Might just be me!!!

If you can get in Ok there are loads of pictures & advice & comments from those that have built them. The designer will answer email questions quickly- or has for me

Thread: Hot Weather and Wall Fastenings
26/07/2018 08:02:17

deleted

 

Edited By Sam Longley 1 on 26/07/2018 08:09:39

Thread: What did you do Today 2018
14/06/2018 13:48:46

Tried threading a shortened spoke for a part on my traction engine. Getting diameter correct for a 2 mm die is difficult so may have been my fault but i do know that the die from the London Tap & Die co was as soft as " !!"forget the technical toolroom term & i never managed it.

Please update on spoke materia, diameter & die used as i have to try again when i return from my travels. I want to end up with 2mm x ( from memory) 40 tpi

As a beginner i find 40 tpi pretty awkward

14/06/2018 13:47:32

Tried threading a shortened spoke for a part on my traction engine. Getting diameter correct for a 2 mm die is difficult so may have been my fault but i do know that the die from the London Tap & Die co was as soft as " !!"forget the technical toolroom term & i never managed it.

Please update on spoke materia, diameter & die used as i have to try again when i return from my travels. I want to end up with 2mm x ( from memory) 40 tpi

As a beginner i find 40 tpi pretty awkward

12/06/2018 13:59:48
Posted by David Standing 1 on 12/06/2018 12:50:16:
Posted by Ady1 on 12/06/2018 09:08:36:

We really should have just hung on to the Harriers

They could probbly get 100 Harriers onto each carrier for the same money and they are combat proven

It's all part of being British, lol

An obsolete aircraft that first went into service 49 years ago!

Yes one might agree, but what are the current capabilities of the supposed enemy that currently exists. Plus one might ask - if it is so out of date, why has America bought some as well as India amd other countries. They obviously consider that the harrier still has a role to play. One might suggest that some aircraft capability is better than none. After all it was an out of date aircraft that disabled the Bismark ( as an historic example of course)

12/06/2018 08:00:05
Posted by not done it yet on 11/06/2018 17:27:10:

SOD,

Or perhaps the Atlantic Conveyor was not designed for operations in the lower half of the ocean!

No we use submarines for that smiley

11/06/2018 14:31:25
Posted by DrDave on 11/06/2018 11:19:57:
Posted by Sam Longley 1 on 10/06/2018 19:33:33

One would assume that it is quite a while since our warships had sails instead of engines

Some years ago, whilst working in Germany, I I had to travel to Toulon to catch a ride on the Charles de Gaulles aircraft carrier. Talking to a (German) colleague, I said that I had to leave to get the flight because we were due to sail the following day. He gave me a strange look, then said “Sail? But she is nuclear powered!” We forget where some of our language originates from.

Yes but it would not have gone down well if the destination was Brest and you had said " i am going to nuke Brest tomorrow"

(Especially as i am currently sitting just the other side of the Rade du Brest in my yacht in Camaret)

10/06/2018 19:33:33
Posted by Bob Mc on 10/06/2018 14:47:39:

Thanks Ady...

yes that could explain it....funnily enough I worked on type 45's myself...but not with engines.

rgds..Bob.

One would assume that it is quite a while since our warships had sails instead of engines . You must be knocking on a bit

27/05/2018 15:12:28

My machining is now on hold until september as i am off sailing. I had just got my traction engin to the point where i could put an air test to it and absolutely nothing happened. The piston did not even shoot to one end. I wish in a way i had not tried as i only had half an hour before i had to shut shop & leave so now i have left wondering what on earth i have done wrong until september

2 things happened which may be of interest to nature lovers. Between Dieppe and le Havre a bird about third the size of a sparrow flew on to the boat in fog and explored the boat. It went inside the cabin &looked all round then came out, hopped on to my arm and up to my shoulder where it sat for a few seconds. It stayed for 15 mins

Then between Le Havre and Cherbourg in very rolly seas the boat was rolling 35 degrees each way. A squall of 25 kts came & out of nowhere a pigeon suddenly landed on my knee. Gave me the fright of my life as i was dozing. I stroked its head , picked it up and placed it on the opposite seat. It had a job to stay put so i put it in the corner by the bulkhead. It drank a lot of water &i expexted it to leave. That was 14-00 hours. When i docked in Cherbourg at 00-05 it was still there even though i had to step over it to rig fenders & lines & sail the boat. There was a lihtening storm for 90 mins. I hate those a 15 metre high mast is not what one wants in an open ocean with lightening belting the sea all around one.

In the night it rained heavy so i moved it under cover but as soon as it stopped it flew on to the pushpit. This morning the winds are light and it has gone

Sad to think that this young bird when it finally gets back to the uk the owner will ring its neck for being so slow but that is what so called "pigeon fanciers" are renowned for

Still i am off to guernsey tuesday then Brest & hopefully into Biscay for a short stay. Then back to pick up a friend to cruise the Dutch canals late august until early sept then i can sort out why my piston does not go back and foreward

 

Edited By Sam Longley 1 on 27/05/2018 15:17:31

Thread: Drinking and Driving.
03/05/2018 18:45:22
Posted by Zebethyal on 03/05/2018 09:55:52:

A former work colleague of mine had a radical idea for the prison system to deter re-offence, and that was to outsource the prison system to Turkey/Thailand!

First offence - a suitable fine (slap on the wrist) along with community service (make them give back to the community).

Any subsequent offences - you go to Bang Kwang in Thailand or Diyarbakir in Turkey, for extending periods of time starting with a 1 month period.

His view was that prison in this country is more like a hotel that is paid for by the tax payer - where is the incentive to improve and not re-offend, many of the prisoners would prefer to be inside that out, which is why they re-offend within weeks of leaving!

He appreciated that there would also need to be some level of oversight, such that you are not sending someone off to Big Tiger (Bang Kwang) for stealing an ice cream, or some other such misdomeaner.

Edited By Zebethyal on 03/05/2018 10:00:57

I have thought the idea of subbing out the prison service to overseas a good idea. It would be cheaper. the prisoners could not threaten prison officers families in the same way that they can in the UK. In reality if prisoners gave the officers a load of lip they would get sharp short treatment.The prison officers would not be frightened of recriminations outside the prisons. It would be possibly to afford more officers. Sentences could be shorter but more rigorous.

The snowflakes in society would complain about visiting but we could offer to send the family to the country in a dedicated hotel for a week at a time so they could visit for a week at a time. In most cases they would probably be sight seeing & treat it as a holiday so would not complain too much. The saving in prison costs would cover it.

It would solve the problem of building prisons at home.

03/05/2018 07:35:16
Posted by Neil Wyatt on 02/05/2018 16:43:36:

Is sentencing for preventing reoffending, deterrence, punishment or restorative justice?

It's one of the biggest conundrums any society faces.

Neil

You are referring to sentencing, not necessarily sending to prison, but taking it to the full step of internment & knowing that a the large part of the prison community is of a particular religious sector (have to be careful here not to break forum rules) It is a fact that a large proportion of those leaving prison are leaving "radicalised".

Now I am not suggesting that a drunkard (& one can include any sector of the community & for any crime not just alcohol related) might be radicalised in a religious way but with the prison system breaking down to the extent that this can be allowed to happen, I can make a fair bet that the atmosphere is such that of those that are not radicalised in a religious way may well be radicalised in a criminal way.

In other words i would not be surprised that instead of coming out having learned a lesson they are coming out with the attitude that they intend to be more " criminal" than when they went in.

So when one reads in the media about the number of those released who go on to commit crimes, I am not sure that prison is actually working as a "deterrent". It is only any good for keeping really dangerous types away from the public for good, rather than being a means of preventing re-offending.

 

Edited By Sam Longley 1 on 03/05/2018 07:39:29

Thread: Plastic Ban
29/04/2018 07:05:34
Posted by Phil Whitley on 27/04/2018 20:59:51:

Mick Charity, How am I part of the problem?, it is very unlikely that my fence will end up in the sea, it has been up more than 15 years and still seems perfect, and the only point in recycling plastic is to use it for another purpose. If you are going to make a ridiculous statement like "you are part of the problem" please try to form and post logical argument as to why this is so!

Sorry but I tend to agree with Mick Charity on this one.

If wood is not recycled it will break down in time & go back into the earth. It is part of nature's cycle ( Not the paint I accept). It is a natural product that can be produced in large quantities. Your plastic needs significant energy to produce (as an aside, does it also use oil in the production process? I am not sure!!) & will, contrary to what you infer, be a real pain to dispose of & in spite of your comment will probably end up in landfill anyway. In most cases one may be deluding one's self about recycling such products & I tend to wonder how much is, truthfully, being recycled.

 

Edited By Sam Longley 1 on 29/04/2018 07:07:59

Thread: Where can I get this hole aligning tool
26/04/2018 14:47:23

I was talking to a yacht rigger today & he was fixing an aluminium plate to a mast. The plate had about 12 holes pre drilled for pop rivets. He placed the plate in position then drilled a hole in the mast. He then used this tool which he inserted through the 2 holes. He tightened the knurled nut on the end & the plate pulled up a bit & the holes aligned perfectly. He then rotated the plate to a slightly better position & drilled another hole & inserted another similar tool. He then drilled all the other holes. Removed the 2 aligners & pop riveted the plate after applying some wax to the holes ( forget the name)

In the picture the left hand side shows 2 pins of half diameter ( they have rotated out of position) which expand when the screw on the right is rotated.

He has several of differing diameter & finds them handy when hanging of a bosuns chair up a mast fixing things like radar domes as he can drill one hole then hold the plate in place whilst drilling other holes.

As a model hobbyist I would find a couple handy from time to time & would like to have a source ( He wants some more)

So does anyone know the name of them & where to get them please

Thanks

Hole aligner

 

better hole aligner

Edited By Sam Longley 1 on 26/04/2018 14:58:02

Thread: English dialect
23/04/2018 11:39:14

Can anyone from the Scottish borders tell me exactly what a " Puffy Dunta" is please ? It is one of 2 things - but which one? I have asked at talks about the borders but no one seems to know. But as a child it was in common use & the locals referred to them often.

Another one (& i know this) is a "Finnon" also used a lot years ago.

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
Eccentric July 5 2018
Eccentric Engineering
Warco
Ausee.com.au
ChesterUK
Allendale Electronics
TRANSWAVE Converters
emcomachinetools
Sarik
Subscription Offer

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