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Member postings for Gray62

Here is a list of all the postings Gray62 has made in our forums. Click on a thread name to jump to the thread.

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Thread: Using Butane
31/12/2010 22:05:07
One problem you will encounter with this form of heating is that burning any form of hydrocarbon fuel will produce water vapour. this will (and I speak from experience here) accelerate surface rusting of all succeptible materiels. All Hydrocarbon fuels such as propane, butane, hexane etc contain significant quantities of Hydrogen and Oxygen which when burned in normal atmospheric conditions rich in Hydrogen and oxygen, will combine to produce water vapour.
 
My advice is NEVER use a propane or butane heat source in a workshop environment unless suitably ventilated.  Our workshops were heated by natural gas but not by direct heating, they utilised a catalytic heating process which produced less than 1% water vapour by volume, significantly less than exhaled by one human being during the working day! So any rusting was our fault and not the heating system
 
I now use Oil filled radiators and tubular greenhouse heaters as background heating in my workshops. Additional heating is then supplied by either fan heaters or radiant halogen heaters for a short term heat burst. The main consideration is to maintain a constant ambient temperature and not let anything drop below the dew point, i.e that point at which water droplets are condensed from the surrounding air and settle on cold surfaces, resulting in rusting of those surfaces.
 
31/12/2010 22:05:00
One problem you will encounter with this form of heating is that burning any form of hydrocarbon fuel will produce water vapour. this will (and I speak from experience here) accelerate surface rusting of all succeptible materiels. All Hydrocarbon fuels such as propane, butane, hexane etc contain significant quantities of Hydrogen and Oxygen which when burned in normal atmospheric conditions rich in Hydrogen and oxygen, will combine to produce water vapour.
 
My advice is NEVER use a propane or butane heat source in a workshop environment unless suitably ventilated.  Our workshops were heated by natural gas but not by direct heating, they utilised a catalytic heating process which produced less than 1% water vapour by volume, significantly less than exhaled by one human being during the working day! So any rusting was our fault and not the heating system
 
I now use Oil filled radiators and tubular greenhouse heaters as background heating in my workshops. Additional heating is then supplied by either fan heaters or radiant halogen heaters for a short term heat burst. The main consideration is to maintain a constant ambient temperature and not let anything drop below the dew point, i.e that point at which water droplets are condensed from the surrounding air and settle on cold surfaces, resulting in rusting of those surfaces.
 
Thread: Anything About Acetylene
31/12/2010 21:45:08
An excerpt from my training notes from many years ago:
Acetylene forms explosive compounds with copper, brass, copper salts, mercury/mercury salts, silver/silver salts and nitric acid. Under no circumstances should acetylene gas come in contact with unalloyed copper, except in a torch. Any contact of acetylene with high-alloyed copper piping will generate copper acetylide, which is extremely reactive and invariably results in a violent explosion. An explosion hazard will also occur if the gas comes into contact with silver bearing materials such as those used in silver-brazed pipeline joints
 
Acetylene is a highly reactive and inherently unstable, and is very sensitive to pressure and temperature and is extremely easy to ignite, the energy capable of igniting acetylene is lower than for any other fuel gas except hydrogen, hence the strict regulations governing the supply and storage of Acetylene gas bottles.
Thread: New Year's Resolutions
31/12/2010 19:51:47
I for one endorse Nicholas Farr's sentiments, MEW should be about workshop related articles, tooling machine modifications, attachments etc etc, machining of models should be kept to ME.
I also agree that there should be more articles that are more generically focused and not biased towards Myfords.
I have nothing against Myford and in fact crave owning a ML7 Tri Leva, for posterity more than anytning, however, there are a lot of us that own machines other than Myford.
All said and done, it does need input from the ME community to cover articles that relate to other machines and I am in the process of developing some attachments that can be adapted to the generic chinese produced machines, I expect within the year to have a couple of articles ready for some interesting projects.
Thread: Warco Lathe Motor Issue
30/12/2010 23:44:47
This Shell Tellus 68, does anyone know the same general oil in other brands? Fuchs, Castrol, etc?
 
Did warco confirm that is the correct oil to use?
 
That's what it states in my manual for the GH1330 and as Warco only sell one lube oil, I guess it's safe to assume that all their GH lathes use the same. THey actually refer to it as Shell Turbo T68, but I am reliably assured that the general name is Tellus 68.
30/12/2010 15:50:08
Try Smith & Allan
DARREN STOKELL
VALLEY STREET
DARLINGTON
Durham
DL1 1QE
United Kingdom Phone: 01325|462228
 
The also sell on ebay
30/12/2010 13:50:58
Hi Anthony, the headstock lube that Warco sell is a lightwight non detergent oil. Shell Tellus 68 is the recommended oil for these type of machines.
Did you use a motor engine oil? These are not recommended as they contain detergents designed to keep particles in suspension to be removed through the pressurised oil filter.
This you do not want in a splash lube lathe headstock, any particles should be allowed to fall to the bottom of the oil sump. It is possible that the heavier oil is causing problems, especially in colder weather.
Thread: rotary tables
30/12/2010 00:02:40
Biggest is not always best. Choose a RT that suits your purposes / requirements.
I have a 6" RT which suits the majority of my needs and occasionally it gets mounted on a purpose made raising block where clearance is insufficient. I also have a 12" RT which gets very occasional use, partly due to its immense weight although it is extremely accurate and an absolute pleasure to use. Both RT's have dividing plates which greatly extends their usefulness, that said, they are both destined to have a conversion to stepper motor control using the divisionmaster kit supplied by MEDW.
Thread: Metal storage
29/12/2010 18:34:04
I have a rack made from MDF for all of my plate/sheet materiel, all stored vertically as this makes it easier to access I use varying sizes/lengths of 50mm plastic/UPVC plumbing pipe for my bar storage. In eachof the shorter tubes, there is an phenolic disc attached to a central rod. If there is a small piece in the bottom of the tube, I simply pull in the rod and 'extract' teh small bits. I make sure the longer lengths go in the appropriate longer tubes. THe tubes are held in an MDF frame which is on castors so can be easily moved around as needed. A small box on the side takes care of all of the smaller offcuts, if it isn't swarf it doesn't get wasted - simples
P.S. I have the luxury of a 5M x 5M workshopw with a 5M x 3M woodshop behind, I feel very spoilt That said, there are still sa lot of improvements to be made to utilisation of space as and when funding/ traction engine/SWMBO allows
Thread: Late delivery of magazines due to adverse weather
29/12/2010 17:32:33
MEW 172 arrived here in NE Hants (Whitehill) today, still waiting on the arrival of the latest ME. 4393, maybe that will arrive tomorrow. All other post seems to be arriving in reasonable time, Amazon, QVC and anything else SWMBO orders!!! so why take it out on the poor old ME
26/12/2010 20:28:54
I for one am not having a go at Royal Mail, as I said, we have received many other items of mail both local and national. I lay the blame for hte late delivery entirely ath the feet of the publishers. MHS constantly make pathetic excuses for late delivery and make promises to correct this which they obviously cannot address.
They cannot even respond to a voicemail - which they encourage you to leave!!!
Absolutely unacceptable
26/12/2010 19:44:55
I cannot believe that the recent 'bad' weather has delayed the delivery of my subscription magazines, this is just a pathetic excuse for poor administration on behalf of the magazine publishers/adminstrators. I have had numerous deliveries of mail items couriered by Royal mail and others.
I used to receive my subscription magazines several days before they hit the newsagent shelves. Over the past few months they have been arriving later and later. Despite complaints to MyHobbyStore and their assurances that the situation will be resolved and that they will put a 'trace' (whatever that means) on my subs magazines, I am still receiving them a day or two after publication date ( or as is the case this month, not at all).
I tried calling MyHobbystore to raise this issue and despite being left on hold with the promise of ..., the final message was, no one was available please leave a message and we will call you back!!!!!
Well, I'm glad I'm not holding my breath for that, because no one did call back.
This service  is to be polite pathetic. I work in a customer service based industry and if we treated our customers in this way we would lose thousands of pounds a day. Maybe MHS see us as smal fry but, they have a duty to provide a service for which we have paid good money. The bad weather is a pathetic excuse.
 
DC1, you need toaddress this immediately otherwise you WILL lose valuable subscriptions.
 
regards
 
One very hacked off Coalburner!!
Thread: Which slideway oil is best?
26/12/2010 09:50:26
The main problem with using motor engine oil as a general purpose lubricant is that it containsdetergents and additives that are designed to hold particles in suspension. As a motor vehicle ol system works under pressure and is constantly fed through a failter, these suspended particles  are removed during the filtration.
If you use this type of oil in a non pressurised system as found in most geared lathe headstocks and feed gearboxes, those suspended particles slowly turn the oil into an abrasive compound and will over time cause excessive gear wear.
The oils recommended for my lathe are Shell Tellus 68 and for the Ajax mill, Tellus 29, these oils have excellent lubrication properties and allow paricles to drop out of suspension and sit in the bottom of the oil sump.
Thread: christmas presents
25/12/2010 13:41:28
I got a new lathe, Warco GH1330, although it was delivered early to beat the Christmas rush So far very pleased with it, needs a little bit of tinkering here and there but no signs of casting sand in the gearboxes and fit and finish seems very good
 
merry christmas all
 
Graeme
Thread: Chuck Salvage?
22/12/2010 18:47:50
I've been experimenting with the electrolytic method for a few weeks now. I am trying to rescue a badly rusted 12" 4 jaw chuck. So far the process has been positive, I have a significant sludge of rusty coloured materiel building up in the bottom of the tank and the surface of the chuck body is slowly turning black, I must admit, I'm a little sceptical as to the condition of the jaw feed screws once this process is complete as they are significantly rusted. If I can save the body and the jaws I will deem that a success, the screws can be manufactured. If it fails, I have a 12" door stop that will withstand a force0 gale . It cost me nothing so owes me nothing, although I don't tell SWMBO how long the power unit is running for !!
Thread: 5C or ER Collet Chuck
16/12/2010 20:38:33
yes you're correct Tony, I did mean 5C offers square, Hex and round, and yes, I do have a need to machine small hex and square part accurately so in that sense , 5C seems the way to go, with an ER32 adapter for better grip on round when necessary.
 
CB
16/12/2010 18:43:20
I am currently contemplating the construction of either a 5C or ER32 collet chuck for my lathe.
 
I appreciate that ER collets may have a better gripping performance over a small range of size however ER collets offer square, round and hex collets wich gives them a distinct advantage. Also it is possible to purchase a 5C to ER32 collet adapter frm ArcEuroTrade.
So, my question is - which is the best choice in terms of versatility and accuracy and what experiences do any of you have of the options selected.
 
thanks in anticipation
 
CB
Thread: Cubic Boron Nitride
14/12/2010 18:04:39
Does anyone know of a good source for CBN grinding disks / wheels suitable for tool and cutter grinders.
 
thanks
 
CB
Thread: Warco Lathe Motor Issue
13/12/2010 22:18:40
With two capacitors, this is a capacitor start/capacitor run type of motor, there are a number of areas that need investigating, look at the capacitors for any sign of bulging or leakage. if either one is failing, this can lead to this type of hunting on startup, also start/run switch inside the motor, if the contacts are damaged this will also cause this problem.
 
A burning smell would suggest a capacitor failing. Don't run the motor any longer until you identify the problem otherwise you will permanently damage the motor windings.
 
Also, I would contact Warco directly, if you want to replace the motor, they will be able to supply you with a direct replacement. If you are considering a 3 phase replacement, I would recommend contacting either drives direct or Newton tesla. The latter probably have more experience in integrating their inverter drives with Warco machines although both are equally well versed with this type of application. My inverter drives have all comke from direct drives and I have had excellent support from them. Usual disclaimer, I have no association with either company, just a satisfied customer.
Thread: Cutting steel plate
09/12/2010 22:25:58
The evolution saws are great for thin material. The 185mm Rage which I have is rated up to 6mm in mild steel, the similar sized fury is rated for 3mm.
The beauty of these saws is that they cut cold and wih little or no sparks and very little effort or vibration.
I have cut 12mm plate in 2 passes with ease, and the blades seem to last for ever!
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