|Thread: Dam Solution?|
Posted by DMB on 07/08/2019 15:41:25
Lots of things have been done by cheapskate methods, including that dam. Long term, they should rebuild it properly from the ground up in massive rocks which cannot be dissolved/washed away like mud.Fill gaps with concrete, job done and 'everlasting.'
Where are Dams built like this not a construction i have heard of?
Posted by old mart on 06/08/2019 17:41:29
I noticed in the Wikipedia entry for the dam that a proportion of the water feeding the dam is diverted into the stream alongside. I assume that steps have been taken to divert all the incoming water into the stream and that it can handle the increase.
The first Chinnok loads before they started on the slipway were to dam the infeed.
Posted by peak4 on 05/08/2019 19:26:08
Posted by JA on 05/08/2019 19:10:53
I have tried to find the capacity of the pumps being used without success. 24 million litres/hr sounds like an awful lot. However if the bore of the pipe was 1" the flow would be 3.7 gal/s which seems sensible.
These from Hereford and Worcester are 7000 litres / Minute apparently
i.e. 420,000 l/hr and there were at least 23 of them working at one time so about 9.6 million l/hr
Edited By peak4 on 05/08/2019 19:27:11
At 7000l/s the velocity in the 150mm / 6" pipe the pump sets have, would be about 1.13m/sec. ie in the normal range of 1 to 3m/s pipe velocity.
for the syphon at 1480 gps is 88800GPM so allowing 18" pipe (500mm as suggested the velocity would be 35m/s
So two questions
how thick does the pipe have to be to resist erosion?
How do you stop it working as a water jet cutter at the discharge?
And in the time we have been speculating on this they have mobalised the pumps and drained 50% or the water
Posted by Neil Wyatt on 03/08/2019 20:24:59
Rather than decrying Wikipedia as 'inaccurate why not take a look at some of the plentiful references in the article?
Past research has shown it to be no less accurate than the Encyclopaedia Britannica.
P.S. Looks to me that the pumps are in the floating yellow bits (sorry Original thought was wrong...)
Edited By Neil Wyatt on 03/08/2019 20:26:32
Come from the High volume pump sets they have been sending.
The are 50 + sets distributed around the fire brigades that do about 420 m3/hr
High Volume pump pods
Saw somewhere they have 16 sets in place now
|Thread: Laser cut plates|
Posted by Fowlers Fury on 02/08/2019 20:50:12
34046 - Have you checked with Malcolm what excess - if any - he requires to be added to your required dimensions? He's done several laser-cut items from my CAD dwgs and he's queried some of my dimensions thankfully !
The laser-cut edges from the company he used for my items were "rough" and hard. They needed draw filing smooth with a diamond file, I accept that techniques may have moved on in the last couple of years but a small dimensional excess was incorporated to allow for the smoothing-off.
If you find a laser cutting company that cuts a lot of stainless steel they wil use a purge gas and the edges will be clean with no oxide.
|Thread: What milling tip do I need?|
Posted by Alistair Robertson 1 on 21/07/2019 21:05:20
I have an 80mm dia. Facing milling cutter with 7 insert locations.
It came to me in a box with a lot of tooling at a local auction a couple of years ago. I have just got to the bottom of the box recently and it was a pleasant surprise as it is in excellent condition, BUT there are no tips to fit it, but the screws are there and don't look as if they have been used!
The only identification is the code A241.80.R.07 The rectangular tips look to be about 12mm x 8mm x 5mm thick with a 3.5mm screw hole. (These sizes are approx)
I have been in contact with several tooling suppliers but as yet none of them can identify what tips I need. I may have to go to a few suppliers and ask to see if I can get something to fit, but perhaps some of the very knowledgeable folks on this forum can identify what I need.
Its Supplied by WNT and new would set you back £418 without discount
Shell end mount needed is 27mm
Insets are LD 1504
WNT will sell to anyone ring up place an order pay by card and call the company hobby. My wife has an account for getting christmas presents etc
|Thread: Do you wear a mask grinding HSS tool bits?|
Posted by Martin Kyte on 28/05/2019 08:48:13
Cobalt would be one good reason.
|Thread: Threading 1/8 stainless steel|
Posted by Eric Cox on 01/05/2019 10:14:14
The die is mounted in a die holder in the tail stock.
plan of attack is,
clean with acetone
open die fully
use aluminium block
plenty of Rocol
Check how central the die is in the tailstock die holder. Some have large clearance bores for the dies to be split open and when used push the die up to .75mm (20thou) off centre which is a lot on basically a 3mm thread.
If this is a problem add 3 tapped holes to die holder at 90 degree intervals so that die can be centered , can then be closed up using two side screws.
Posted by Eric Cox on 30/04/2019 16:04:52
I'm trying to cut a 5BA thread on 1/8" stainless steel rod held in the 3jaw lathe chuck. The die starts to cut then the rod slips in the chuck marking the rod. Would I be better off using a 1/8 c0llet chuck.
Better with a collet, Degrease material with Acetone or IPA to improve grip.
How are you holding the die?
You could take a couple of thou off diameter
|Thread: Dovetail cutter|
Posted by JasonB on 15/04/2019 13:35:19
Posted by Peter F on 14/04/2019 23:20:41
Sherwood I've found to be some of the best cutting tools available,
Just worth pointing out that Sherwood tools come from a forest in China and have never been anywhere near Nottingham, but nice to know that you find the far east product one of the best
Not always, I bought a load of Carbide endmills (about 20) when they were on offer in ther flyer leaflet and they all cane in a box direct from sandvik with a delivery note with me as the drop adress.
|Thread: Mini boring tool|
Posted by Douglas Johnston on 30/03/2019 19:04:00
Seems to be only available to companies when I looked. I suppose I could try to invent a company to fill in their form but I'm sure they would show me the door.
You dont nned to be a company they will sell to anyone paying.
Even my wife has an account for getting me Christmas and Birthday presents sometimes.
Just ring up and say if you want to buy something
Its the same with MSC
Posted by Plasma on 30/03/2019 14:28:01
Yes of course. I was trying to buy a Komet insert for my threading tool holder, but Komet have been absorbed by a larger group and I believe WNT is the parent group of ceratizit.
I dealt with their office in Sheffield and had to register for an account to buy anything.
The flyer included drill sets, er 32 collects etc. So might be something there for you.
Website is www.wnt.com
Best regards Mick
The collets are very good as are the thin parting and grooving tools.
|Thread: Hello, Alexander master toolmaker|
Posted by David George 1 on 21/02/2019 07:52:25
Hi Ali Have you looked at www.lathes.co.uk I used one of these about 50 years ago very versatile but a pain to set up accurately.
Why were they a pain to set up.
Interested as I fancy something of that design style
|Thread: One off castings|
Swan foundry in Banbury
Sand castings with Iron and all sorts of lost wax
|Thread: Knurling Wheel Comparison / Supplier ?|
Posted by Steve Crow on 06/02/2019 18:44:25
Posted by Gas_mantle. on 06/02/2019 18:29:28
My cheapo Chinesium knurling tool gives good results for the money - only £15 with 2 sets of wheels.
It looks the same as mine - I'll have to check. Price was the same anyway.
I might have just got a bad one. I've noticed this with cheap imports before. I think that quality control is so low that although most things are at least serviceable, a high percentage of shoddy goods slip through the net.
The quality control is with the customer, Thats why its cheaper.
|Thread: DIY Epoxy Frame based CNC MILL|
This looks an interesting post, keep them coming as you can.
|Thread: ME Shows in UK for private exhibitors|
stevePosted by Neil Wyatt on 12/10/2018 22:15:58:
Posted by S.D.L. on 12/10/2018 21:44:57
Where is the news about no Bristol next year?
I've had a press release, there will be an official announcement in the next MEW.
They hope to run a new format show in 2020.
Thanks for the info, when Dave said, “ most people will know” I was mystified as there was nothing I could find on their website. Shame as one of the better shows.
Posted by steamdave on 11/10/2018 22:53:36:
No doubt by now, most people will know that there will not be a 2019 Bristol ME Exhibition.
I have been going over from Ireland to Bristol for a few years as a private exhibitor and was wondering what other similar exhibitions are around for private exhibitors. Ideally, I would like to attend a show that is on for more than one day to make the travelling worthwhile.
Any suggestions (and perhaps an invitation)? I don't do hot fog.
The Emerald Isle
Where is the news about no Bristol next year?
|Thread: Doncaster show|
Posted by Mark Rand on 28/08/2018 20:34:03:
It isn't the 26th one at Doncaster Racecourse, since it started at Donnington...
Err it started at Harrogate.
The one at Donnington was at kenilwirth before that and had aprevious home and is now at foss wayj.
|Thread: What did you do Today 2018|
Posted by Andrew Johnston on 09/08/2018 19:07:37:
Machined the second smokebox door last night. I got a better finish than on the first one, simply by reversing the feed direction from inside to outside to outside to inside:
If I'd thought about it that gives a rather better cutting geometry for the tool with less chance of interference, especially near the centre.
Was the door a casting or a solid disk of steel.