Member postings for brian jones 11

Ok for clarity then what tools are you using in the vids, they dont look like inserts, brazed tip? HSS

it is said that you can get a finer sharp edge on HSS so make cutting easier. too sharpe an edge on carbide makes them liable to chip the edge too easily especially on manual feed.

It also appears that the combination of surface speed, depth of cut and feed rate are what can make all the difference

saw a vid on this on here somewhere - fascinating 3" billet taking off 10,20,30 thou same speed same power feed only mid one gave a mirror finish

30 thou he upped the feed rate, and it came out fine? how do you work all this out

have not got a grip on this yet

perhaps cnc s/w does all this calc for you/

Well my question was "would you encourage a kid to become an engineer"

Sadly the becoming a professional engineer is to start on a long road of disappointments. The training is long and arduous as is gaining experience and credibility

At a party for yuppies

What do you do?"

"Im an engineer"

"oh good could you come and fix my washing machine"

Industry in general gives talented engineers a very paltry prestige level

But you are probably pursuing this lost cause out of a sense of vocation - as many of the best do,

As you move up in the heirarchy you may get to "Chief Engineer". At this level you do almost no real engineering and your time is taken up with man management and board room politics.

The politic clowns make a nonesense out of you work for personal aggrandisment (just look at Bojo)

Look how his two chief scientists = pre-eminent in their fields of virology and epidemics (Messrs Whitty and Valance)

See how they were publicly humiliated and discredited for their cautious but scientific approach.

Thats what you can expect when you rise up as a chief engineer - you become a political football and you have neither the patience nor interest in fighting off these clowns.

Prime example was the development of the Rolls Royce jet engine

In 1946, the UK government agreed to sell Rolls Royce Nene jet engines to the USSR as long as they don't use it for military purposes. The Soviets quickly started putting them into jet fighter aircraft. Was the British government really that naive?

Sir Stafford Cripps, whose decision it was, leaned heavily to the left of the political spectrum (and was expelled from the Labour Party before the war because of that) and was in addition extremely naive. He managed to rejoin the Labour Party in 1945, and was made President of the Board of Trade in the 1945 Labour government.

He was besotted with Communist Russia and the Soviet regime, and so was naturally inclined to agree when a Russian trade delegation asked to buy a few Nene engines and a licence to produce the Nene.

Soviet technicians reverse-engineered the Nene, produced their own version, the Klimov VK-1. Rolls-Royce, of course, never saw a penny in license fees. Installed in the MiG-15, the engine was responsible for many British and Allied deaths during the Korean War.

Indeed I have been scrabbling around, but most of the links are to iso type tables (15 or so)

what I wanted was to input the code and the app would spit out the decoded result.

this could all be done on Xcel but I have so many dozens of unfinished little jobs I was hoping someone may have got there first

OBTW one member wisely noted that referencing US mfg beware as they use imp units vs metric for rest of the world and the coding maybe different

heres my take on the tool height dilemma

hope it make sense - for illustration only as you must check your own dimensions

so with the desirable and plentiful 12mm holder you can

a) skim 2mm off the holder base (or part skim as suggested leaving a step on the overhang)

b) Skim the top of the topslide - but then the 4 way block will be wrong and you will need shims for a 5/16" hss

c) Make up a 4mm shim piece to fit under the holder and use the elephants foot

d) buy a new chinese machine and stop dickering around

What do you think

Obtw I have made the assumption that a 12mm holder will also mean the height of the tool tip - is this always right?

Another member mentioned the use a  16mm holder and doing some skimming to make it fit.  According to my estimate it should fit as is under an elephant foot see below - pls advise as I dont have one of these yet and I was thinking of getting a set with  triangle pieces (in fact it was steviegtr as above)

Edited By brian jones 11 on 10/07/2021 16:02:34

Edited By brian jones 11 on 10/07/2021 16:06:07

I did some evalutaion of the tin oxide sensors (a few quid from RS components at the time were were looking at flammable gas detection. these were used in the leisure boating to "detect" build up of lpg in bilges

we could only say that they had a reaction but its extent was unreliable an unrepeatable. what worked one day didnt the the next, they could become saturated, poisoned (hairspray) react to many other gases,

in short no one could figure out what was happening and why.

They got a lot of industry fraudulent hype at the time

q

Also a director of a small company doing gas sensing equipment for air quality and medical research.

uq

did you use the Taguchi semiconductor gas sensor

that looks very solid to me, and simple. These triangle tips have a lot going for them

BTW has anyone come across a prog for decoding carbide language for tools and tips, ie you just put in the code and it spits out the spec

I saw it mentioned somewhere now lost in the mists of dementia

Very wise observation SOD

Well this topic has certainly raised some hackles - and its still fairly friendly yet at the same time many valid points have arisen

The question is - would you advise your kid to go into engineering?

One absent category here I notice is that of the pathetically small business men SMEs

Working for themselves, wouldnt have time for this gossip

btw if we are talking about domestic electricians dont mention them to me I have a generally low opinion of this breed of entitled rapacious cowboy. BUT if we are talking of the industrial type with his full JIB + special courses then thats a real professional. You dont get into a factory without the right pedigree - got my vote

Being self employed sole trader is a whole different game and until you ve been there you wont know how hard it is.

I had a business once, I bought a village pub from receivership, it was cheaper than a 2 bedroom house

The goings on - I could write a book about it - very hard work

My locals used to come in for builders hour (early doors 4pm) to shoot the breeze and take the pss. I would frequently remind them they were in my front room and also these guys were all tradesmen on £10 ph min (30 years ago while I was on £1 ph which was the truth but nobody believed me. 100hrs/wk no hols no sickies, no staff but we all had a laugh it was quite an experience but gruelling physical work

I used every trick in the book to avoid spending money but I still managed to stay in the black and never had to borrow (it was freehold) and because I never had time to spend I always had 100 notes in my back pocket every week

I daresay if you are a journeyman CNC accredited contractor you could make good money if you can be away from the OH and your kids 6 nights a week going the length of the country and you would expect 60hrs/wk

Anyone done that here - been self employed

btw SRN Nurses get £45ph going agency - look up https://www.reed.co.uk/jobs/hamilton-cross/p52446

my lathe never been that clean, eat you dinner off it

wow that looks like the dogs............ ca $10 on Ali

looks like you would use that with a standard myford clamp

https://www.myford.co.uk/acatalog/TOOL-CLAMP--74-1409-1-1278.html

I'll go and check tool height and revert

My spindle speed is 1500 max

well thats reassuring, i was having visions of entering a black hole and indeed I am only do small jobs gently does it.

Reading up about the Axminster (siegel) KX3 was a shock and awe experience - but then so is rocket science

must keep my feet on the ground and not aim for the moon

Cheers

As I am getting into proper milling on my DW, stoopid boy Pike has just realised that tools need cooling and oils dont cut it

You need air blast cooling from compressed air - as I have seen on these CNC millers. I have seen how the small swarf particle congeal around the tip and quickly obscure the work ( magnetism?)

I have a shop vac to suck this away but it interupts work.

What kind of air flow do I need for this duty?

Ive seen another user with a silent shhh compressor (£350)0.9cfm 1/4 hp

My own workshop compressor is a noisy bstd and only for intermittent use - inflating car tyres etc. I wouldnt use it full time I am sure it would burn out - it was only £60

Then another issue arises - as reported by another member = this will blast metal particle around the place, hence its no coincidence that CNC mills have a ventillated enclosure

OMG where it this going

anyone else been down this route?

looks like going down a country road in E Africa at the start of the rainy season

Edited By brian jones 11 on 09/07/2021 06:35:19

A senor citizen said dont waste your money (but you can waste you free time sharpening and resetting hss bits)

it seems going carbide really is a walk on the wild side

ive been struggling with it for some time

I remember a machine tool ex had a harrison set up with a 3: billet of steel, the assembled crowd were fenced back and he set it going at a helluva lick, then took a fat cut and a blue swirl of swarfe shot off contunuously and dangerous. when stopped we all gasped at the mirror finish and the fact the tool and work piece were cold, and no coolant - dry cut

from then on i knew my days on a Ward 7a were numbered

So here is a vid which i hope isnt a promo but it goes a long way to demystifying some stuff, hope it helps

https://www.youtube.com/watch?v=rsFFWYo8ugw

carbide for dummies

Whats the opinion on the machining and materials quality of the Indian Enfields?

I mention this because Lister staionary twin cyl diesel model cs were popular prewar power plants giving 10hp

but they went bust post war and the designs were taken up in India popularly known as Listeroids. they were sold all over the far east to power rice mills, but they had a poor reputation for crankshaft breakage - due to poor casting material

A guy in USA bought a new one and had it crated over.  He took one look and stripped it down to every last nut and bolt, cleaned up all the casting from swarf and scale, and often re threaded with proper nuts and bolts as the finish and clearances were so bad.

He got it up and running for his off grid gen set

He said he wouldnt do it again and doesnt trust its reliability

contrast that with another workhorse that sold millions - Kubota

Edited By brian jones 11 on 08/07/2021 19:06:45

AFAIK, the rear wheel worm drive was gun metal and wore out quickly and the lack of air cooled back cylinder used to over heat on a long ride. They look however but so does an elephant but i wouldnt want to own one

Loading up a Myford - like giving a child a bag of cement to carry

this OP shows the extent and depth of knowledge to be found on seemingly mundane topic - like a collet assy- only to find that the subject is a lot more complex than seen at first

Stoopid boy pike wrong again, my DW has a 5/16 drawbar and the spindle is drill out to 1/64 clearance nearly 8mm

but our UK ykw shop confirms shank lenght of their collet set so it will fit with my draw bar and adapter - you have to check and not make assumptions

so I will go for that and have done

maybe get some actual work done

I feel like Ive had a pillar drill without any proper drill set - but MEW has set me right thnx 10^6

I only want to use straight shank end mills and following worthy advice to get a collet system - trouble is many uk suppliers seem to be out of stock - has there been a post lockdown stampede?

im getting there waitng on a question of shank length to see if it will fit Auntie DW

as one door closes, another on slams in your face.

ive scrabbled around on this all afternoon

so where' the link? the iso std is 10mm