Here is a list of all the postings Alistair Robertson 1 has made in our forums. Click on a thread name to jump to the thread.
|Thread: Drilling cast iron - where did I go wrong?|
When drilling decent cast iron then any pilot hole should be no bigger than the chisel point of the drill.
When I was an apprentice our foreman would not allow a pilot hole for any hole that was smaller than 1 inch! "What do you think they put that sharp bit on the drill for? Cutting thin air" he would say!
I remember him drilling 2 1/4" holes in 4 inch thick steel plates with no pilot hole on a horizontal driller. There were 100's of holes to be drilled and he said if he had drilled a pilot hole the 2 1/4" drill would have chipped and probably smashed on the broken bits. He had the ability to sharpen the chisel point to his own special shape and 100 holes without having to re-sharpen the drill was the norm. The steel spiral swarf had to be seen to be believed!
|Thread: Shipping to USA|
A couple of years ago we got a bit of kit from an oil company in the USA in a lovely sturdy wooden box. We modified the bit of kit with our own improvements, We carefully put everything back in the crate and phoned the shipping agent to pick it up. They came, picked it up and returned it a few days later saying the crate was not acceptable to US standards. The fact that "Made in USA" was emblazoned all over the crate did not seem to occur to them!!
They simply would not accept the crate and said we had to get another empty case sent from the USA with the correct paperwork, transfer the kit and return to the USA. The American company gave up and got it picked up, sent to France and it was sent to the USA that way.
About a month later an empty crate arrived fro the USA with all the paperwork exactly the same as the previous one. One of our machinists took the crate home to make in to a kennel for his dogs! While dismantling he found a copy of the bill for the crate, $2700!
|Thread: Dual speed motor on Hardinge HLV-H - Fast not working|
When I ran a small workshop we had a few of these machines and from your description of the noise i would almost guarantee that your motor is missing a phase in the high setting.
Our maintenance man would get on the job immediately and generally had it fixed in less than 30 minutes.
It was almost always a dirty connection and a good clean soon fixed it.
|Thread: Homeworkshop login problem|
I am trying to register with Homeworkshop as I have a few bits and pieces to offer for sale or free.
The registration process comes to a halt with the message "This email address does not accept incoming emails, Required for registration"
I have four separate Email addresses including my University work address but it will not accept any of them.
If new users cannot register then things will come to a halt and a valuable resource will be lost.
|Thread: Dialect expressions|
An expression that is used in the local north east Scotland and probably a lot further afield is "A sooter's bairn is aye the worst shod" (A shoemaker's children are often in the poorest shoes) Meaning that things to be done at home are often neglected but carried out for someone else! That probably applies the whole world over!
|Thread: Bridgeport vibes|
What I should have added is that in the back gear the spindle pulley is not connected directly but through the gear train which dampens out the transmitted vibration.
Vibration in high is usually caused by slight variations between the drive and spindle pulleys and most important the quality if the vee-belt. A cheap belt has quite a big tolerance on section size and width. A cheap belt is a couple of pounds and a quality and correct one is nearer £20!
I bought a Warco drill and just replacing the vee-belts transformed the machine with no vibration from the motor. Previously the whole machine had a vibration. I can now balance a £1 coin on the drill table when it is running.
|Thread: Changing Broadband|
About six months ago I upgreded to fibre when it became available in our village.
The date and time was set for the change-over.
It is broadband to the cabinet at the end of our street so no re-wiring required at home.
At 9.30am my existing broadband went dead and I was to try and connect with the fibre router after about an hour. Nothing happened for a couple of hours so I phoned my ISP who said "everything is working OK. When I said no they said the router must be faulty, we will send you another one. I said the router is OK, the line is showing an error with a tester I had bought on-line. They insisted the line was OK and I had to fit a new router which duly arrived, was fitted , with exactly the same result! Again I was told the router was faulty and a new one was on the way!!
I insisted that the line was checked by Openreach and next day a very nice guy who lived about a mile from me arrived, checked the line, said there was something wrong in the cabinet and went to investigate.
He returned to say that it was the strangest fault he had seen. The cable from my home had been split with one wire in one cabinet and the other in the next about a meter apart!
He said the first thing an ISP will do is send out a new router. He had one customer with 5 replacements stacked on the shelf above the phone socket!!
|Thread: Drill too high? Use a milling machine stand!|
Thanks for the positive comments but my main workshop is not nearly as tidy as that one, which is my CNC Mill and Lathe, computer and more technical bits shop.
I have Harrison lathe and a Bridgeport mill in my main shed and the reason I bought the drill was that if I just wanted a hole drilled in something then I had to leave the CNC shed, go down some garden steps and along a 40 toot path just to find I had to set up the Bridgeport to put a hole in something! This was OK on a fine summer evening but when it was cold and wintry then it got annoying.
I forgot to say that I have recently fitted a digital speed read-out to the drill which reads directly from the spindle so I can still change speed using the belts and get the speed exactly what I want with the VFD inverter.
A couple of years ago I bought an SB12 benchtop drill from Warco, A good drill for the price but I wasn't sure which bench it was supposed to fit.
Lifting it on to my bench meant that the point of any drill and the swarf flying from it was directly in line with my eyes. That was a no go so the thinking cap had to be looked out!
I didn't want to build a smaller bench so with faithful measuring tape in hand I came to the conclusion that perhaps a milling machine stand would work.
So it was back to Warco to buy a 3240 milling machine stand. This was not cheap but it was the correct height and had various drawers and a cupboard etc, with a proper splash tray.
The various holes did not of course line up and there were bits of thin air around but a trip down the road to my local fabrication shop produced from the back of the guillotine a suitable bit of 10mm plate. A couple of trims in the guillotine had that sorted and I came home as happy as anything.
A bit of measuring and marking some tapped and clearance holes then a coat of primer and proper Warco green top-coat, delivered in the drawer of the stand. meant it was all ready to bolt together.
This modification has produced a drill as good as, indeed better than any industrial machine I have used for the last almost 40 years after I fitted a 3 phase motor and an inverter.
I have included some photos of what I did but although I took a couple of pictures of the plate when I made it they seem to have gone AWOL.
|Thread: Casino Bonus Email Spam|
Hi, over the last few weeks I have been getting spam emails about a casino bonus.
I have never clicked on any and deleted them when they appear in my inbox but I now find that I am getting an increasing number each day, sometimes 20 or 30. which takes a bit of time to sort out.
I alerted my ISP but they say that they can do nothing as each one has come from a different email address.
They said that it is a huge problem and if it gets too bad then they may have to suspend my email address!
Has anyone found a solution if it is bothering them?
|Thread: Motor Gland|
Motor threads are "usually" 3/4" Condiut. 750" o.d. x 16 threads per inch, These are NOT BSP.
Condiut is designated by the Outside Diameter.
BSP threads are designated by the nominal bore of the pipe.
Not just relevant to an engineering hobby but may have relevance for a lot of people on this site.
I recently retired and had several personal and works pensions to sort out.
All the personal and most of the works pensions were very good to excellent. One of them pays £125 per month and I worked to them for less that 3 years!
An older one has offered me a monthly plan that will mean I will have to live until I am 98 just to get my money back and if I chose to get 50% for my wife after I am gone she will have to live to 128 years old if I were to die on the day the pension comes in to force!
When I questioned them they said people were living longer and their rates were base on this.
I have tried to move it to other providers but they are much the same.
Has anyone else found a similar situation?
|Thread: Single to 3 phase invertor and smart meters|
Some years ago my father-in-law was in a house with economy 7 or white meter as it was called in Scotland. He used to get up at 5.30am to switch on the washing machine etc to get the advantage of the supposed cheap rate electricity. The bill was not very detailed in those days but we noticed that the economy units and the final bill did not add up so he questioned it. The company were not really prepared to discuss it until he insisted and he received a chart showing the costs of the supposed "economy" units.
The price changed several times during the so called "economy" period and he found he was being charged nearly twice the "day" rate for his early morning clothes washing!
The company refused to explain why the "economy" rates were so expensive other than to say that is how the meters were supplied and they couldn't he changed!
|Thread: AF socket sets. Are they extinct|
When I begun my apprenticeship I bought a Britool 1/2" socket set with BSW, BSF and A/F Sockets.
Some sockets were marked BSW, some BSF and others had BSW and BSF sizes on the same socket!
I never did work out what the relationship was as I had 3 different bolt size charts and they were all different!, so it was a case of "try it on and see"
I still have most of the sockets etc so I will look them out some day and see if I can work it out (or maybe not!)
I almost had a heart attack when I realised that I had paid almost £110 for the set.
My wages were about £8 a week then, so that is the equivalent of about £800 - £900 today or maybe more.
|Thread: H80 bandsaw: bronze dust in gearbox|
Bronze dust would be common in a basic worm drive gearbox especially one that had been assembled but never "run in". I would drain it, wash the dust out and re-assemble with good quality worm drive oil.
I worked for a company where we made worn drive gearboxes for aerospace use and the worm and wheel were lapped in in a jig. When they were assembled and run on the test rig for a couple of days, They were then stripped and if any bronze dust was found, then the whole procedure was repeated (many times!)
The inspector's criteria was that his white glove had to be absolutely clean when he rubbed around in the gearbox to allow the "run in" certificate to be issued.
It must have cost a fortune!
|Thread: Hay bales|
In Scotland because it was (still is!) difficult to get 3 sunny days in a row we used to stack the hay in "coles" about 8 feet in diameter by about the same high. They stayed in the field until any threat of "heating" had passed, then they were dragged tthe corner of the field and built in to a few "hay rucks" for winter feed.
The method of dragging was that a rope was attached to the tractor drawbar, round the "cole" then back on the drawbar pin. My job was to stand on the drawbar holding on to the rope as my uncle drove the tractor at top speed (about 18 mph) to the next "cole". Health and Safety not even thought about!! I then had to take one end of the rope, run round the "cole" re-attach the rope to the drawbar. then back to the "cole" to loosely hold the rope about 6" off the ground, shout OK and the tractor was drawn forward to tighten the rope and me with, feet standing on the rope and balancing against the "cole" away across the "park" at top speed to where the "big" men were building the "ruck"
On one occasion, somehow my foot went down the back of the rope and I fell back, flat on the ground. My Uncle took off with me trailing behind but my shouts were drowned out by the roar of the exhaust from the old Fordson at full throttle! I was dragged for about 400 yards and suffered a bruised ankle but I was expected (and went ) out to drag the other "coles"...I was off school for a few days as I couldn't get my school shoe on that foot ( I had been wearing gym shoes and they were not allowed in class!)
This thread has brought back wonderful memories of a time long past but fondly remebered.
|Thread: Deburing holes|
Back in my machining days we used a 90 degree countersink in a cordless drill to beburr holes for tapping and appearance. Our inspector would not accept any unchamfered holes and woe betide any draughtsman or designer who produced any design without the sharp edge removed! He was not averse to telling the boss that it was not acceptable but he was such a sharp guy that his position was secure. He could spot when there was an error in any project and must have saved the company a fortune over the years.
|Thread: Hay bales|
I believe you are probably right about the "thrash" expression but I didn't think about it at the time. The expression is still in use today in north east Scotland describing a determined pub crawl with nothing in particular to celebrate. just an excuse to have a hang-over for a few days!
To get back to the topic of this thread I wrote a paragraph about bales and I forgot to add it to the text!
When the straw came out of the end of the "mull" (Usually a Barclay Ross and Hutchison, made in Aberdeen) it was fed in to a horizontal baler with the most fearsome "nodding donkey" sort of serrated head that moved up and down about six feet and packed the straw in to the chamber where it was compressed by a square piston driven by a crank with an attached flywheel about six feet in diameter. I cannot remember the name of the baler after all this time but it was a most impressive bit of kit. The bales were about 1 cwt. in weight but awkward to handle, the tying string bit in to your hands and only bits of sacking wrapped around the fingers helped to prevent your fingers getting red raw, By the end of the day your shirt was covered with blood from your hands. The bales were then stacked in a square "soo" (it resembled a fat pig! The bales were stacked to put a pitch on the roof and covered with a canvas cover. This served as bedding for any animals over the summer and early winter.
I remember when my grandfather cut round a field of corn (oats) with a sythe to allow his binder, an american Deering with a left-hand cut, to get round the field to begin the cutting. The binder was pulled by a Fordson tractor and was supplied as new with a drawbar but if you looked closely the brackets were still on the frame where shafts for converting to horse drawn were still there.
The sheaves were stacked on "stooks" of eight sheaves for a few days for drying in the wind and the sun. When they were dry they were forked on to a horse drawn wagon equipped with "shelvings" which allowed two rows of sheaves to be stacked, top and tail. They were then taken to the "corn yard" where the "rucks" were built on stone bases. This was a most important job as the "rucks" had to be built to the highest standard and with great pride as these would stand for many months for all the neighbouring farmers and visitors to see. They also had to with stand the worst of winter and it was a huge blow to a farmers pride if a "ruck" was blown down in a winter storm.
A "ruck" was dismantled every few weeks to allow the sheaves to be "thrashed" in the small mill at the farm for animal feed as required but in the spring any remaining "rucks" were "thrashed" by the "traivlin' mull" anbd the resulting corn sold as a cash crop to help the farm finances. The coming of the "mull" was the high point of the farming year as neighbouring farms sent their workers to man all the jobs that had to be done. The "mull" would arrive the night before and set up, often in darkness to start at 8 o'clock next morning. The "mull" crew had to be up at 5am if they had a steam engine but the coming of the Field Marshal tractor gave them a while longer in their beds!
The "thrash" went on all day but always concluded by 6pm. to allow the neighbouring farm workers to get home to their beds as they probably had to be back next morning to continue or at least move on to the next "thrash" 13 men and 2 women were needed to keep a "traivellin' mull" going and I very much doubt that you could get that amount of fit and able men within 25 square miles today!
This way of life ended by the late 60's as the availability and acceptance of combines took over although I remember a couple of brothers who used a binder for the last time about 1998!
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