What did you do today? (2014)

[rooferParticipant @roofer]

Posted by Russell Eberhardt on 27/08/2014 11:33:04:

Posted by Bubble on 26/08/2014 17:52:20:

Gears for the oil pump on my Morris 8 engine.

Great work. Never had to do that on my Morris. Just grinding the cover plate flat to remove the wear brought the oil pressure back.

Russell.

Edited By Russell Eberhardt on 27/08/2014 11:34:17

Edited By Russell Eberhardt on 27/08/2014 11:37:21

Done this to an old Range Rover classic with great sucess too.

[Anonymous]

Jim: Thanks for the elucidation on the method. I'd agree that 25 facets on an 11DP gear would be pretty much invisible. I had a trawl through my gear design books and found the following equation for the minimum number of teeth before undercutting occurs when using a straight sided hob, it depends only upon the pressure angle. The second equation was found elsewhere, but is mathematically identical, albeit in a more elegant form:

Regards,

Andrew

[MuzzerParticipant @muzzer]

Whether or not you use Solidworks (or even use any form of CAD at all), here's an interesting video showing how to construct a gear model. Using parameters, the module size and number of teeth can be dialled in and the rest adjusts appropriately. This approach could be applied to DP (imperial) gears with minor changes.

It takes a little time to build up the model but about 10 mins in, the tooth construction is apparent.

Murray

[Raymond Sanderson 2Participant @raymondsanderson2]

I went for a spill off my workshop stool.
One of the ally feet broke and I found another cracked latter on when checking.
Its just 2 weeks since I put new wheels on and when doing so didn't notice any signs of cracks.
I was sitting at full height as its a draughtmans stool and toppled over backwards sort of, some injury nothing major a twisted knee and ankle and hurt pride.

I have a spare stool so can head back out tomorrow.

[Michael GilliganParticipant @michaelgilligan61133]

Raymond,

Please forgive me if this sounds critical; but I suspect that your improvements may have been a contributing factor.

… Those fixings for the castors look non-standard for a stool, and may have created some "stress-raisers" [ in the mechanical, rather than the emotional sense ]

MichaelG.

[Oompa LumpaParticipant @oompalumpa34302]

Irrespective, don't you just feel like a Balloon when something like this happens!

I really need to get myself something along the same lines but without the wonky foot

graham.

[Ian S CParticipant @iansc]

The chair I'm sitting on now has similar geometry, it doesn't seem to have an excess of metal, probably about 3 mm thick, with some webs across the inverted U shape. The castors are pushed into holes in the die casting, and drilling these through would indeed weaken the structure. On closer inspection my chair will not fail through metal fatigue, it's made of plastic!       Ian S C

 

 

Edited By Ian S C on 28/08/2014 14:23:16

[Raymond Sanderson 2Participant @raymondsanderson2]

Posted by Michael Gilligan on 28/08/2014 07:51:35:

Raymond,

Please forgive me if this sounds critical; but I suspect that your improvements may have been a contributing factor.

… Those fixings for the castors look non-standard for a stool, and may have created some "stress-raisers" [ in the mechanical, rather than the emotional sense ]

MichaelG.

Michael I've been using the draughtsman stool now for some 7 yrs it has not had an easy life goodness knows how old it was before I got it 2nd hand. I know of many who had suffered similar fates and worse during the years draughtsman used them. The place I buy my castors from have done the same with their plastic office chairs much lower of course.

The stresses I put the chair under moving about the workshop with the alloy as thin as it is although well webbed structure it has been a good chair.

Glad i have a spare the same.

[Raymond Sanderson 2Participant @raymondsanderson2]

Posted by Oompa Lumpa on 28/08/2014 08:51:00:

Irrespective, don't you just feel like a Balloon when something like this happens!

I really need to get myself something along the same lines but without the wonky foot

graham.

Graham I wish I had been a balloon the fall would have been a lighter one LOL

As I just mentioned to Michael its been in use now over 7yrs the new castors just installed 2 or 3 weeks gone and no sign of cracks the old castors had worn down enough so the breaks/locking devices were not holding. its a bugger trying to transfer to a moving stool.The spare stool with older type castors LINK

[Raymond Sanderson 2Participant @raymondsanderson2]

Posted by Ian S C on 28/08/2014 14:19:25:

The chair I'm sitting on now has similar geometry, it doesn't seem to have an excess of metal, probably about 3 mm thick, with some webs across the inverted U shape. The castors are pushed into holes in the die casting, and drilling these through would indeed weaken the structure. On closer inspection my chair will not fail through metal fatigue, it's made of plastic! Ian S C

Edited By Ian S C on 28/08/2014 14:23:16

Ian it didn't snap/crack at the hole but about 10mm away. I won't say the castors didn't add to it but after 7yrs use by me in a harsh environment.

The plastic base ones well like the wheels they don't last long and I have seen them snap the whole arm off anywhere from the castor area right to the centre join. That use has been in offices by lighter persons than myself.

I have had thoughts of making a tube frame and new centre of steel as this is a long term situation for me.

There are wheelchair type situations which raise you up by elec/hydraulics cost tho is so much out of reach its cheaper to buy a new small car.

[“Bill Hancox”Participant @billhancox]

Ray

Good Gracious. You must be made of tough stuff. That incident could have finished a normal man like this unlucky bloke.http://www.youtube.com/watch?v=RAwYq7Acc3o

Bill

[Raymond Sanderson 2Participant @raymondsanderson2]

Bill LOML was just as close at the time helping clean up from the mornings wood turning. Good job all the hammers wee out of reach.

Every time I see that clip it reminds me of my parents in reverse rolls not quite but I bet dad wished he could have done similar LOL.

[Clive HartlandParticipant @clivehartland94829]

This has been an interesting week, we had Monday off ( Bank Hol) so on Tues,. morning i went to work and the place was locked up and I sat for an hour reading my paper and then left to go back home as it seemed there was not going to be any one else coming. Wed. morning wifey gets a phone call saying the Boss man had lost the sight in one eye. Thur. morning i go in and the other lad is there and he has had a call saying that the eye injury was where the eye had gone 'Milky' . So now I will have to wait till Mon. to get the full story. Needless to say we also heard that he was shunted around from the eye hospital to A & E, Anything to elongate the waiting times. I will come back on this as soon as I hear from the horses mouth as to what happened. You could not meet a nicer chap than Peter, he has had all sorts of family problems and just soldiers on doing what he has to do.

Clive

[Michael GilliganParticipant @michaelgilligan61133]

Bought an interesting little "Jason" lathe today:

I believe this was the final design by Brian Perris, but [for whatever reason] was not the version that eventually morphed into the Cowells.

If anyone knows the last chapter in the history of Perris; do please share it.

MichaelG.

.

Edit: added hyperlink

Edited By Michael Gilligan on 29/08/2014 20:34:21

[Neil WyattModerator @neilwyatt]

Very neat Michael, rather more sophisticated than the Adepts though!

Did you find this page on Tony's website?

Neil

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Neil Wyatt on 29/08/2014 21:12:09:

Did you find this page on Tony's website?

.

Yes, thanks Neil … I had seen that page, and also have a dim recollection of meeting Mr Perris at one of the ME Exhibitions.

It may have something to do with the several other parties that were involved at the time, but I would be very interested to know why Cowells didn't develop the Jason design [to my eye, it has great promise].

MichaelG.

.

P.S. … If I've missed something in Tony's write-up, do please point me to it.

[lancelotParticipant @lancelot]

Hi all…measured up cabinet cut a section of shed wall out ''double skinned '' so quite a job…removed cabinet through hole …repaired and strengthened hole with security items…If using ''GORILLA GLUE'' do what it says on the tin ''WEAR GLOVES'' .

[Chris TriceParticipant @christrice43267]

I took the plunge yesterday and bought a Newton Tesla Speed Control package for my Super 7 which arrived this afternoon and is already fitted. Very impressive piece of kit and worth every penny. I've lost the 12 volt feed for the Myford worklight but I've got another 230 volt worklight I can substitute.

[Les Jones 1Participant @lesjones1]

Hi Chris,
Why don't you retain the 12 volt light and buy a 12 volt lighting transformer from Screwfix or Toolstation. For example this one.

Les.

[OuBallieParticipant @ouballie]

Chris,

You have done the right thing!

It will transform the lathe, as I found out with mine.

Did you get the remote station as well?

Now fit a clutch!

Geoff – How did I manage before fitting the clutch?

[JohnFParticipant @johnf59703]

Geoff, which clutch do you mean? Presumably not the the main spindle clutch which is of course standard on the S7

John

[Chris TriceParticipant @christrice43267]

Geoff, it’s got a clutch as standard. Les, thanks for the link. I might drop by Screwfix later today as that’s an option.

[Raymond Sanderson 2Participant @raymondsanderson2]

What a beautiful day 22C shed time all going well…………then a visit to the WC went to wash hands and no pressure from the hot water a small squirt was all I got. Checked other taps silch nothing although cold water was ok.
HUM gas hot water service, don't tell me its sprung a leak? Nope its gone out and will not restart auto sut off has closed it all off.

Tried ringing Estate Agent as we are renting, closed Sunday, tried Estate manager still nothing. So sent SMS and emails including to Landlord 1rh later no reply so tried all numbers again finally got onto Principle of Estate agent and landlord (who said ring estate agent DOH why didn't I think of that).
Its Sunday finally call from someone who cares the estate manager she has located emergency plumber and he's over 50k's away and no idea when he'll be able to get here.

Maybe I should ring Asia ???

It put paid to a good afternoon in the workshop no good getting all hot and smelly and not being able to shower tonight.

[OuBallieParticipant @ouballie]

Any clutch that could be fitted.

Just showing my ignorance with regards to Myford

Geoff – I must keep it zipped before checking facts

[Nick_GParticipant @nick_g]

Posted by Raymond Sanderson 2 on 31/08/2014 08:35:57:

no pressure from the hot water a small squirt was all I got. Checked other taps silch nothing although cold water was ok.

Is it a combination boiler.?

Has the pressure in it dropped.? If it is a 'combi' boiler there will be a pressure guage on it. This should show a pressure of about between 1 – 2 bar. If this has dropped the boiler will auto shut off.

There is normally a 'filling loop' close to the boiler if this is the case. Repressurise by opening the filling loop valve until the pressure rises again. (don't forget to turn off when pressure has increased)

It may of course be something totally different that is at fault. – But this is a common one.!

Nick

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