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Member postings for robjon44

Here is a list of all the postings robjon44 has made in our forums. Click on a thread name to jump to the thread.

Thread: "The Unique"
16/09/2020 08:32:31

Hi all, I was given a Unique indicator by one of my setters during my apprenticeship some 60 years ago, doesn't time fly when your having fun? These days I keep all my measuring equipment in a dedicated section of a sliding wall wardrobe in the back bedroom in case I need to measure something, I tried to avoid measuring things throughout my working life after I discovered they expected me to do it all the time! With regard to the Unique I know I still have it however it has joined the growing number of items that if I want to look for it I stand on the pavement across the road & say "its in there somewhere", stop me if you've heard that one before.

BobH.

Thread: Dead blow mallet
03/09/2020 08:47:43

Hi all, as an apprentice operating a shaper in the toolroom refurbishing old school brazed tip copying lathe tools the weapon of choice was a big lead hammer, they of course became politically incorrect although 50 years later I still have one for real emergency's, also a modern rubber coated dead blow item for gentle clobbering of items which need to remain unblemished. Most of these however are a little on the large size for tapping components about on faceplates or gently trueing things up so I have a piece of lead gas pipe retrieved as I was refurbishing the first little terraced house I owned ( other sources are available ) about 7" long it is perfectly suited to the task, if you cannot find such a thing then knock up (geddit) a light hammer with say one copper & one lead head.

Bob H.

Thread: Aircraft General Discussion
05/08/2020 18:16:06

Hi all, on recent trip to North Lincolnshire went to range at Donna Nook & saw 2 Apache attack helicopters giving targets on the beach some wellie with their 30mm chain cannons, surprised we can afford it these days smile p

Bob H

Thread: We need Pi
12/07/2020 09:23:01

Gentlemen, an anectdote if I may, one day I observed my foreman, an inveterate meddler across the gangway so I walked across & held up a box of spent tips so he would give me a requisition for a new box without interrupting his flow, I became aware that he was in the throes of explaining to a giant of a man called Boxer who had the broken nose to prove it & was also one of the highest paid pieceworkers in the shop, how to calculate the circumference of a circle that he might be able to select the precise spindle required for the job in hand, he then proceeded to try to explain the value of Pi & then stumbled at the first hurdle when he couldn't remember if it was 22 over 7 or 7 over 22, at this point I had to run away before I collapsed in hysterical laughter, I use a calculator wiv all them Greek letters on it meself.

BobH

Edited By robjon44 on 12/07/2020 09:25:15

Thread: Thread identification
30/06/2020 13:09:04

Hi all, when I was a young apprentice I campaigned a150cc BSA Bantam & when it became time to dismantle the engine I was struggling to remove the flywheel of the Wipac flywheel magneto having a boss with a large fine thread on the outboard end to accomodate an extractor, I consulted with the foreman of the toolroom where I was working as he used a 175 Bantam as a ride to work bike, he took me to the place where they made large steel hydraulic pipework & picked up a couple of large conical nuts, one then placed a 5/16 plain washer on the last diameter of the crankshaft screw the nut onto the large thread snugged up to the washer then 1 clout with a brass hammer & the flywheel was off! , so if a thread exists you can usually find something ready made for a one off job like the one described above. PS later I learned that you could make all sorts of interesting things for yourself in a large machine shop with an attached toolroom, who knew?

BobH

Thread: Drill sharpening?
11/06/2020 14:40:38

Hi Bo'sun, if you don't have time to waste do not waste any learning to off hand grind twist drills, your time is too valuable! I myself can grind a passable drill point by hand but that will not be acceptable most of the time, it seems that most of the Picador swing type jobs are distinctly hit & miss judging by the many articles about trying to get them to function correctly in MEW & Model Engineer. So, I have a Drill Doctor purchased a long time ago at a knock down drag out price from a car boot & if I had a pound for every 135 degree split point it sharpened during my working life I would be a very rich man, it is a little known fact that when setting & operating 2 small CNC bar machines where most of the holes are drilled with TiN coated HSS drills having access to 56mm U drills are no help at all. So it is quite possible to grind a 4 facet point where the facets are flat ie not curved using the toolrest designed by Mr Harold Hall incorporating rear stop, micrometer (ish) forward feed & 2 position indexing capability. I have on one of my bench grinders 2 metal bodied diamond wheels, 1 six inch & 1 two & a half inch still capable of lapping carbide tipped masonry drills et al, on the face. To address the final misgiving, that is grinding on the side of the wheel, purchase the stout type of wheel used on tool & cutter grinders specifically designed for grinding on the face not the periphery.

BobH

Thread: Hermes Parcels
10/06/2020 11:28:31

Hi all, my limited experience (thankfully) of Hermes came about when I purchased a Pratt Burnerd 6" 2 jaw chuck from a woodworker who had acquired it in a job lot of gear relevant to his craft, he sent it via Mr Hermes & when it turned up here the driver threw it up my concrete drive resulting in serious damage to the rather elaborate custom box that the woodworking gentleman had fitted around it, even I was amazed by the length of the woodscrews securing it in place so fortunately no damage was done, more by luck than good judgement I fear, as I was in at the time, I then checked the operation of the doorbell which turned out to be loud enough to wake the dead, seeking an explanation I rang Hermes & was basically told that "you just can't get the staff", I have never used them again in all the years since!

However & at the risk of incurring a jinx, in my own selling of tools & equipment online I use Collect Plus & in a good number of years they have not dropped the ball once, if it suits you can print off their address/ bar code label online & coincidentally their nearest drop off point is within walking distance of my home, (other walking distances are available) result.

BobH.

Thread: Aircraft General Discussion
03/06/2020 09:56:20

Hi all, yesterday while sitting in the back garden with the missus minding our collective own business I heard a puttering noise ( technical term ) a few moments later a Piper J3 Cub flew past quite low & at a leisurely pace, the only one I have ever seen, coincidentally there is a scale modelling magazine on the desk next to me with an advert for a Thunder Tiger ARTF kit of this aircraft on the back cover & to round it out my other halfs maiden name is Piper!

Bob H.

Thread: Repair advice, please!
27/05/2020 10:30:20

Hi all, the finest repair system I have ever seen for crack repairs of this type is the "Metalock Stitching System", no heat, no specialized welding equipment nor the skills to use it. System consists of a hardened guide to assist the drilling of a short row of holes at 90 degrees across the crack conducted with an electric drill, the stitch insert is a hardened steel replica of the crack & the row of holes at a slightly lesser pitch, it is fitted with a special tool called I believe a 2 pound ball pein hammer (other hammers are available), this drags the crack closed whether it likes it or not ! leaving it only to be tidied up smooth & painted over, have no idea as to availability these days, but have seen it used with complete success, I have set the hare running!

Bob H

Thread: Riveted Linked Vee Belt
26/05/2020 11:57:24

Hi Andy, a co-conspirator & I once campaigned a very large lathe & drilling machine in his workshop & both required major dismantling to replace main motor drive belts therefore when this was necessary we replaced these with said Brammer link belts largely to preclude the hernias that removing the offending components would have caused, these were not the original brown ones but the more modern red. I got good results using a pair of circlip pliars of the type where removing the pivot screw & replacing it in an alternate hole converted it from internal to external operation. The following falls under the auspices of the Official Secrets Act, as an experiment he conducted a trial by filing the heads of the rivets into the more modern rectangular shape & so that he could assemble the joint with an ordinary pair of pliars, starting with head of rivet longways then twisting through 90 degrees, worked like a charm & the machine ran for years, however there are clearly Heath & Safety implications involved so don't try this at home. In fact I still have a 7 foot 6 inch length of it hanging up in my garage (unmodified!)

BobH.

Thread: Strange WW1 Chuck - 1MT
23/05/2020 12:26:37

Hi all, I have 2 of these drill chucks, a small zero to half inch one acquired for a few pence at a car boot, this I secured on a ground shaft between centres & turned a nice true running boss on the rear end this enables it to be held in the 3 jaw for a bit of quick & dirty drilling on work fastened on cross slide, the bigger one turned up in a box of "stuff" I picked up at a garage sale, 3" diameter body, 120 degree vee in the jaws, branded to the Skinner Chuck company of the USA, patent 1903, fitted an MT3 to Jacobs taper shank from ARC Eurotrade as I was passing one day, of the type with detachable tang, as the jaws interleave minimum size is zero although I don't have many drills that size, max three quarter inch, will obviously hold hexagon shanks or stock accurately true, I have used it in the drilling machine, milling head & from the lathe chuck, with drawbar when required of course & I can report that the grip can be best described as ferocious, it has never lost grip on a straight drill shank when deployed on a manual lathe or experimentally when nothing else would do on a Colchester Tornado CNC lathe ( needs must when the devil rides) absolutely cannot fault them.

Bob H

Thread: Which Digital Compact Camera?
21/05/2020 12:01:29

May I just mention that having owned a LUMIX with both rear screen & viewfinder that for those who wish to use the screen in bright sunlight that there are pop up shades that fold flat when not in use but I found very effective when deployed, spectacle wearer here real PIA if switching between screen & viewer for whatever reason, pop up shade magic.

Bob H

Thread: Fantastic British engineering
23/04/2020 11:13:04

Hi all, with regard to the relentless march of modern technology its really a case of smoke 'em if you've got 'em or be trampled underfoot I'm afraid, I am not being unkind nor am I speaking in home workshop terms, but in the Big Wide World Out There terms. My go to disparaging remark to folk who can't cut it ( literally ) is "my granny could do better than that", at the age of 17 during WW1, she worked in a factory making aero engines as a turner, I'm willing to bet if they could have had the tech that is available now they would have snatched your hand off! Fast forward 50 years, whilst in my apprenticeship as a skilled turner I was given a brand new Herbert No 7C, flame hardened bed, what was basically an electrically operated DSG gearbox enabling access to all speeds while spindle running, copying attachment, brass turners guard to stop one getting a faceful of swarf, whoa! what a ripper, fast forward another 40 years & I purchased that very machine at the dawn of the 21st century for the princely sum of £640, while we awaited the finishing of the construction of a 3,500 square foot industrial unit to fulfil my then employers dream of filling it to the ceiling with CNC machines for sub contract machining, which soon came to pass, in the meantime I demonstrated the Herbs capability at demolishing metal, I should add that by this time I had been a CNC machinist or Programmer/ Setter/ Operator for some 35 years, during this extended period of time I had seen the demise of the british car & motorcycle industries because they were campaigning machine tools they had purchased before WW2 whilst competing with Japanese companies who turned over their inventory every 3 years. When I had the great joy of attending the Mazak factory in Worcester to take the training course for their Mazak Fusion twin head lathe I reckoned I was pretty close to the leading edge of modern technology, you know, internal & external CCTV cameras, iris recognition to keep sticky fingers off the control panel etc etc & all the coffee you could drink! So in industry its a case of fit in or ……. you know the rest.

However in the home workshop setting the availability of suitable machines, lathes, mills, drilling machines is fast drying up, I myself pigged out while the going was good, therefore my Acorntools 7" shaper was single phase from new, as is the Meddings floor standing drilling machine, Warco lathe/ mill & somewhat rare Pools Special lathe, the only one with countershaft drive as standard, (see Lathes.co.uk) complete with original motor still whizzing along, very nearly older than me & I'm older than dirt! so there is still suitable gear out there, although a tad difficult to acquire in the current deeply unpleasant circumstances.

Cheers & Keep Safe Bob H

Thread: Will cash become obsolete ?
14/04/2020 14:56:28

Hi all, DMB I feel that I should warn you that I have long held the view that it is possible to die of nostalgia, aside from the fact that I have not yet got over Johnny Kidd & the Pirates after 60 years, all the things you describe were part of my daily life back then, every school day me & my mate across the road would hot foot it to the end of our street to ambush the empty horse drawn milk wagon on its way back to the Coops facility at the other end of town, a short sprint, grab onto the back & place feet on rear axle, bale out as it passed the school gate, that will be why old fools tell you they had to make their own entertainment in those days & of course Health & Safety legislation was still a twinkle in somebodies eye, so think on lad.

Cheers BobH

smile p

Thread: tipped tooling
23/02/2020 10:15:16

Hi all, with regard to brazed tip Tungsten Carbide & butt welded HSS tools, they were never intended to be used as supplied, at the end of the production line in both cases I believe there was a man who picked up each one & showed it a grinder & said "this is a grinder, you may need to become acquainted with it at some point", indeed if I had a pound for every one that I ground for myself or other people I could have retired at the age of 25! So, if you can't grind them yourself or find someone to do it for you then put them aside, you will get far better results using small section HSS bits in home made holders with a bench grinder with half way decent tool rests as advocated by Mr Harold Hall etc,or indeed the Diamond Toolholder advertised on this very page! PS do not insult this cutting media by tip toeing about, it is capable of cutting at the read heat of steel so remember its called roughing out for a reason!

Cheers Bob H.

Thread: Nalon Viper
14/12/2019 12:06:17

Hi Ramon, it is recognised that anyone can become increasingly sensitised to cast iron dust, in times gone by a condition called Turners Lung was recognised by doctors, I have only ever known one person in a lifetime as a turner who had it whilst working manual lathes machining shedloads of CI dry & he said he was coughing up rust !, however he eventually got a job with a reputable company with a more enlightened view of H&S more creative filtration etc. In more modern times on CNC lathes the size of Transit vans we always machined it under high pressure coolant without problems.

I suggest as a solution acquiring or making one of those belt packs worn by welders which supply filtered air into their helmets which protect them from the noxious products of their welding activities, all of my mates who were welders swore by (not at) them.

Bob H

Thread: Knurling tool operation
24/11/2019 14:44:26

Hi all, indeed the cut knurling tools on Mr Cutwells site are indeed works of art ( or tool pornography ), the secret being that the shafts that the knurls attached to are geared together at the other end inside the head of the unit to prevent mismatches of the pattern. Used them a lot on CNC lathes, to make them cut of course the wheels have a substantial angle into the front face, probably 10 degrees or more which produces a stream of fine chippings & gives an excellent form & finish on the product meant to be seen, clutch alignment tools for BMW motorcycles as an example, in shedloads. The single wheel ones are for straight knurling & work in exactly the same way, I have an example in front of me, a wheelstud & the knurl on it to be pressed into a wheelhub has a mirror finish, again made in thousands. However I did test that one out on a manual lathe out of curiosity & it performed flawlessly, therefore if you could acquire such a wheel or modify an ordinary hardened steel one on a T&C grinder? Finally I have in my Private Collection a 3 wheel version of this type of cut knurler that can definitely be used on a manual machine, it features 3 longitudinal arms with knurls on the ends & knurled ring on the body to wind in or out to the required size, so skim a bar end to size, establish knurl size then let it rip on the job in hand, I've been castigated many times on here for using industrial sized tooling, however in my working lifetime there have been many opportunities to acquire such items at little or no cost which in a home workshop environment would likely last forever

BobH

Thread: Record 25 vice handle
14/11/2019 11:15:13

Hi all, then just for the icing on the cake you could fit a suitably fat O ring at each end, under the head, to forestall that eye watering moment whilst in a rush, when the handle slides down from a near vertical position & traps the web between your thumb & first finger creating a torrent of Industrial Language, just a thought.

Cheers, Bob H

Thread: Scam alert
09/11/2019 11:47:18

Hi all, phone rang this morning, picked up without speaking & was informed that it was a recorded message with regard to a payment soon to be taken from my Amazon Prime account & would I like to press some number keys for more information, alarm bells began to ring not least because I don't have such an account! However, knowing the sophisticated technology these a holes have at their disposal, such as making a cut & paste of anything you say to make it appear that you did verbally authorise the payment I cancelled the call followed by checking that I indeed was not the proud owner of such an account, paranoid I know, but the reason I posted it on here was that there may be those who use our forums who may not know the lengths these creeps use to steal from them.

Cheers, robjon44

Thread: Cutting stainless steel rod. Bandsaw or chopsaw?
04/11/2019 08:37:56

Hi all, +1 for the stands to convert an angle grinder into a chop saw, the 1st one I acquired, new in box from a car boot sale, was of sheet metal construction & proved more than adequate for the task, the most memorable thing was that when I set about assembling it the instructions began "set the baseplate with 3 chinks at the front" I assumed this to be a private joke by whomever translated the sheet, I muddled through as I didn't have time to rope in some guys from my takeaway of choice to help as they always seem so busy, anyway some time later another one showed up, you guessed it £4 at the car boot sale brand new, made in Germany, with a heavy cast iron base & chromed parts, even more marvellous than the original one, which I donated to a local "Men's Shed". The 1mm slitting discs certainly do a good job & are readily obtainable from Toolstation & the like, or if you are as tight as me, from the discount supermarkets & have proved just as durable.

Cheers, Bob H.

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