Member postings for BOB BLACKSHAW

This from the Indian army, made by Sword

This one is a modern copy MWC

Thanks for the reply Chris and old Al I checked back on my orders for the stainless and its 304, I will pay more attention next time when ordering stainless.

Bob

Edited By BOB BLACKSHAW on 14/11/2020 10:52:10

I have checked the search but cant find some information on threading stainless steel. I'm making a steam valve and used 4mm stainless part turned down to 2.95mm to thread 3mm, put a start on but the thread was rounded of, the stainless is to tough for the die. I used 4mm mild steel rod instead and had a nice thread with the same die, problem is I would have preferred stainless. Are there stainless rods that can be threaded that's not tough, I have around 4 meters of this stainless. I have some old cooker oven grills which are just over 4mm chrome plated that could be used.

Bob

My SXP mill fine feed has so much backlash, you will be best to fit a DRO, no problems after. When using the fine feed I pull down on the handle and turn the fine feed knob as this takes up the backlash if you don't the cutter could drop approximately 1mm, I would imagine that your fine feed is the same as mine.

Bob

Thanks for the information on the watch Dave, interesting.

Bob

I have a combination set marked Ministry of Supply. This CWC army watch with arrow.

I thought that the whole idea of digital was to view passed issues which I done a few years ago when I was working nights. What will happen to these issues if flash is stopped? Pratical Mechanics on Google books can be viewed, I'm finding this rather confusing.

Bob

Reading the links if I've got this correct I will still be able to access digital archive but will lose the very early magazines when windows 10 will close Adobe in December. How many old issues will not be accessible ?

Bob

I was just to order the MEW after two years off today, will I have any problems with windows 10, its basic with out the thrills compute Lenovo, no office and stuff like that.

Bob

Edited By BOB BLACKSHAW on 07/11/2020 09:56:26

I have a workshop book from the early 1900s showing a similar stock and dies.

Thanks every so much for the cad drawings Jason. I am a bit lost by the port not fully uncovering when on the full stroke and bottom stroke,obviously if this is the case then this is what I am seeking on the valve set up now.

My past engines work great on a nebuliser but as they where assembled I could not see the valve movement with the ports.

Thanks Bob

Sorry for the delay Jason, My drawing shows that its the same as the Stuart cylinder drawing that you sent me the other day. My drawing is blurred but its 5/64 ths from edge of ports. Why a 1/8th eccentric on the drawing when it should be 3/32. Book states that the ports are cast in the cylinder.

Thanks Bob

Thanks Oliver, I've got the the same book.

Bob

Thanks Jason, if not I will scan it.

Bob

Thanks Old School, I cant work this out. The A A Rayman drawing calls for the Stuart cylinder which in the past post the measurements are given for this so if the casting was used these ports are cast in the casting. I have made the cylinder from bar stock to the measurements required from the post from Jason so the same as the Stuart cylinder. The drawing from A A Rayman calls for a 1/8 th eccentric, so a 1/4 inch total, but if its the same cylinder then it should be 3/32 and not 1/8th, so if the 1/8th was used how can it work? the total length on A A Raymans drawing for the valve is 5/8 th.

Any help please, Bob    Nice pictures of your cars old School .

Edited By BOB BLACKSHAW on 31/10/2020 15:57:06

Thanks, all the measurements don't work out here, it's a Stuart 10 cylinder measurements but incorrect on other parts on the A A Raymans drawing. I shall bung it in a bag and start on something else .

Bob

Thanks Jason, is the internal gap on the valve slide 3/8ths as it is on my drawing, also the throw on eccentric on mine is 1/8th. This looks like a remake of valve chest and valve as I've made the cylinder to measurements given on the previous post.

Bob