Member postings for Michael Brett 1

I took the handle of and the spring was in place and seemed in good condition. It was all very dirty though with lots of swarf mainly brass. I gave it all a good clean and now it is working fine. Must of been all the muck stopping it getting enough grip. If I have any more trouble I will order another spring. Thanks for all your advice.

Cheers Mike

Hi al

I have a Myford super 7 lathe ,imperial version. On the top slide the marking ring turns with the hand wheel as it should . But on the cross-slide the marking ring almost spins freely, which means I cannot use it for measuring how much I am turning off. Is there some sort of clutch mechanism , if so how can I tighten it up.

Or does something need replacing. Thanks in advance for any help.

Mike

Thanks for the advise folks, I have now worked out what needs to be done. I just did not want to butcher all the parts then find out there was another way of fitting it. Yes I have got the fixing kit with 8 mm bolts but I am going to try and grind down the 10 mm bolts at the base as they will be a better fit on the vice base. Will also use a couple of tee nuts ground down for the location slides.

Wish me luck Mike.

More problems

I purchased a SX2P mill from Arc Eurotrade along with a 80 mm radial milling vice which was recommended for this machine . However when it came to fitting the vice the bolts supplied are 10 mm while the slots on the table are 8 mm.

Also the guide blocks on the vice are 14 mm so cannot be used in the 8 mm slots on the table.

All seems very strange when they are supposed to be compatible .

Has anyone else come across this problem and managed to find a solution.

Mike

Done it,

Many thanks guys, Mike

My mill has the hole on the spindle, not very easy to get a grip on . Tried turning the nut on the top anti clockwise , goes about 1/8 th of a turn then locks solid. How much force should this take to release it , afraid of breaking something.

Mike

Hi

Just trying to set up my new SX2P mill. Instructions say insert pin in column and turn wrench counter clockwise . Tried this but it seems to be tightening it up. There seems to be a grub screw on the actual collar, wondered if I had to remove this first. Anyone got one of these.

Mike

Many thanks for replies

John PM sent.

Regards Mike

Hello all

After building many steam engines , both stationary and locomotives, I would like to try something a little different. I have searched on the internet for plans to build a hit and miss engine but to no avail . Has anybody had experience of these engines or know of a source of instructions to help me on my way. I don't think I can run to a set of castings but would prefer to build from bar stock.

Cheers Mike

Thomas PM sent.

Mike

Steve

Yes you would think so . but according to most of the people I spoke to on the phone its not going to make much difference straight away. One said call back in a couple of months when things go back to normal.

Mike

Hi all

Before Covid I used to go to my local metal stockist ASC in Peterborough and get of cuts of brass and aluminium at prices so low ,made me feel like I was robbing the place. Now though because of the pandemic they are not letting the public in, along with others that I have tried in my area, Does anyone know of a stockist in my area that has of-cuts fore sale. I am fed up with paying FleeceBay prices.

Mike

Many thanks for your replies . I have now taken the plunge and machined the eccentrics to the drawings kindly posted by Nick Clarke. Moving the valve seems to open the ports the same as other engines I have built so all seems as it should.

Mike

From the diagram above I read the eccentric throw as 9/64 x 2 which is about 7.2 mm throw.

From another site on the web someone has stated that this does not give enough port opening and the throw should be 11.13 mm .

Now I am confused , which is correct.

Mike

Hi Nick

Many thanks for the information.

Regards Mike

HI again

I have ended up with a throw on the crankpin of 17/32 between centres. All I need to know now is what is the throw between centres on the eccentric.

Any ideas Mike

No think I made a mistake there , distance between crank centres would be half that , 1/2 plus 1/16.

Mike

Many thanks for replies. I should have made it clear that the cylinders are complete and finished , so no chance to alter that. Just to get this right as I understand it. Cylinders are 1 3/4 inch minus 1/8 inch for caps = 1 5/8 inch minus about 1/2 for piston , so distance between crank centres would be 1 1/8 inch, correct ?

Mike

Hi all

I have acquired a pair of Tich 3.5 inch gauge cylinders that I intend to use as the basis for a twin cylinder horizontal mill engine. My question is does anybody know what the piston stroke is on this engine. I just need the distance between the centre of the big end crank to the centre of the small end of the crank.

Many thanks Mike