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Member postings for bricky

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

Thread: The Manchester Model Engineering Exhibition
17/02/2016 07:52:30

It's good to see shows starting up as it will help keep the hobby alive.Manchester is to far for me but the Spalding show which started two years ago allowed my friend and I to exhibit,with only 30 miles to travel this is not to much of a chore.The Harrogate show moving to Doncaster race course is also within reach ,giving the East midlands better access to shows.All credit to the organisers and wish them all the success they deserve.

Frank

Thread: Chilled cast iron piston casting
05/02/2016 07:43:58

The piston is now 1/4" chilled on the skirt I am thinking of changing tack and using a steel piston ,as it has piston rings I hope that differing expansion rates won't be a problem.

Frank

04/02/2016 16:59:49

I have had it in the fire overnight and then cooled it in a bucket of ash.Nearly there a third is still chilled so I am making progress.I have taken it to bright orange with my torches and buried it in the ashes,fingers crossed I might get a result.

Thread: Cutting with a large tap
04/02/2016 16:47:39

Thanks for your replies,I will screwcut and use it as a chaser as sugested.

Frank

04/02/2016 11:14:02

I have aquired a 40mm*1.5mm tap for forming the threads on accessories for my large bore Myford.Can I bore to size and tap without screwcutting or is that going to be to difficult.I have never used a tap this size before so I am seeking advice.

Frank

Thread: Chilled cast iron piston casting
03/02/2016 22:21:48

I have had it in the fire and left it for hours then buried it in some kiln dried sand until cooled.The chilled area has migrated to the end of the casting or was at the end as well as the seams.Should I try again?

Frank

03/02/2016 21:46:51

I am building the Centaur gas engine and had problems with the cylinder liner being chilled along the mould joints.This caused an oval bore which took many hours to hone true.I have the same problem with the piston casting but it is 1/2" of the circumferance of the skirt.I am osing aTC tipped Knife tool but it is not cutting properly over the chilled area .Has anybody got an idea what to do,I am desperate for advice.

Frank

Thread: Test bar
19/01/2016 08:00:29

Kieth

The Taper from the face of the spindle to the start of the 1" bore is 2.5" and as the test bar that I bought has a taper of 4" so it would not enter the 1" bore so I had to reduce the end of the taper by 1.5" for it to fit.Thanks to Rods sugestion I used a tipped Knife tool ground to a small tip and using 77 rpm and fine cuts so as not to build up to much heat as well as lots of coolant .I was wary of the build up of heat but using this approach it was barly noticable.A satifactory result.Thanks to all who replied to my dilema.

Frank

18/01/2016 19:34:20

Thanks for al the input.I will give your sugestion a go Rod there is 1.5" to reduce to 1" so that it will fit into the 2.5" long taper of the spindle bore.I did tell Warco's salesman I wanted it for a large bore Myford.

Frank

18/01/2016 07:37:01

I bought a 4 morse taper test bar from the Allexander Palace show on Saturday.I have a Myford large bore and discovered when tried that it is to long and won't enter the 1" bore to allow the taper to seat.I don't want to cut off the end, if at all possible as I wish to retain the centre pop so that I can use the bar for between testing.The bar is hardened,can I turn this down or is grinding the only solution.Your approach to the problem would be appreciated.

Frank

Thread: seig SX3 dead???
14/01/2016 17:58:23

I have an SX3 and bought from ARC 5 years ago,it had a small mechanical problem and was fixed immediatly.The machine is a joy to use if you don't expect it to work as hard as an industrial machine.I have had no issues with and cannot fault the customer service from ARC.

Frank

Thread: Dehumidifiers
12/01/2016 20:15:43

My workshop is 5mt*5mt there is a studio above.The walls are 4" brickwork and has 3 double glazed windows.I run a dehumidifier on economy 7 over night from 11 until 8 in the morning on a time switch.I never have heat in the workshop and just wear extra clothes when the temperature drops to 40f. i have no rust and I would recommend anyone to use a dehumidifier.I think that heating a workshop intermitantly can cause condensation to form.I have worked outside for 50 years so the cold doesn't bother me.

Frank

Thread: Square cube law
09/01/2016 13:21:36

Hi

Could someone explain the square cube law please in relation to scale down engines.

Frank

i

Thread: Forging HSS?
19/12/2015 17:37:44

Let down a square file old by preferance ,forge the ends over in opposite directions.Grind to form a boring bar and the other end for internal screw cutting.Harden and temper. Mine is second hand and was forged back in the 1920,s It is 9" long but works a treat.

IFrank

19/12/2015 17:35:29

Let down a square file old by preferance ,forge the ends over in opposite directions.Grind to form a boring bar and the other end for internal screw cutting.Harden and temper. Mine is second hand and was forged back in the 1920,s It is 9" long but works a treat.

IFrank

Thread: A request
16/12/2015 15:28:46

I find that in general shortening of speech is common.New build instead of new building,your spend ,your shop.This is promoted in magazines ,adverts and television.More, is inserted before a word instead of using plurals .Is this to do with texting that people have got used to shortening words .Gripe over.

Frank

Thread: Setting up a long bar for between centres turning
13/12/2015 08:47:36

Hi

Nobody has yet mentioned that the space availiable will not allow the cross slide far enough to the end of the bed for the tool to start at the end of the bar.Before starting check this out.

Frank

Thread: Myford rear toolpost
13/12/2015 00:52:38

Hi

As Peter has explained it does not matter which.To find your lathes centre height scratch a piece of flat bar supported upright with a square across the centre that you have mounted in your mandrel and then measure with your calipers.

Frank

Thread: adding images to a posting
09/12/2015 11:16:51

Dear Niel

I don't know how to add images to my posts.I saw a post the other day and you explained the process,I didn't have time to copy this and I can't find the original post you replied to.Could you please tell me which post to look for.

Frank

Thread: What is the most useful workshop tool that you have made?
17/11/2015 20:26:15

A QCT that Is totaly different from the dixon type and is easy to make.I designed this after seeing a toolpost by Pratt Burnerd.I do own a Dixon type but my holder is quicker and more versatile than the one I own.The only draw back is that each individual tool has to be packed to height but once done it's the most useful tool I own.Idid send anconstruction article with a disc of photographs to D,Clarke and asked if they were suitable for publication.After varius emails and phone calls the only response I got was that he hadn't had time to look for it.This took well over a year and put me off trying to get anything I have made published.

Frank

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