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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: MEW 178 - Unimat 3 Tailtock Capstan
06/06/2011 14:16:29
I read the above article with interest, and with a view to adapting it to my Warco GH1330.
The part that really interested me was the method to produce the rack as I have another application awaiting a rack.
Then I read this and got all confused:
 
'A section of 12mm roofing bolt will produce 2 racks...etc
Clamp the bolt lengthwise...'
And this is the confusing bit
'remove one side of the bolt to a point 3mm above its diameter'
 
Am I misreading/misunderstanding this or is this a misprint.
 
Help before I go completely mad, I have read this several times and it still does not make sense to me
 
cheers
 
Graeme
Thread: Living with the digital copies
05/06/2011 09:55:59
If you look at the help page for the reader, you will see that the icon that allows skip to page function, is actually part of the navigation menu. The publishers of the digital editions have deliberately disabled some of the functionality of this menu, this is where download as pdf would be enabled.
The quality of pages downloaded as PDF are totally unacceptable. Even the new editions produce unreadable copy. There is no justifiable reason for this if the originals are produced as PDF's then the printed output should be the same quality as the original printed magazine.
 
DC1, I think you need to get involved in this issue as representative of the subscribing community. THis needs to be sorted ASAP.
 
regards
 
Graeme
Thread: Super glue (cyanoacrylate)
03/06/2011 14:20:07
Try these people Hafixs I've had a bottle in the fridge for about 2 years now, bring it up to room temp use, put back in fridge. Works every time and does not seem to be losing its strength
 
Graeme
Thread: This months MEW are 3 CNC features two too many
31/05/2011 22:08:32
I think the possibilities of CNC is of interest to all model engineers but realistically out of the reach of most.
For many many years models of extremely high quality have been produced by dedicated model engineers with manual machines, and that will continue for many years to come. CNC machines are of limited appeal to themajority of the ME community and whilt we all may deam of owning such equipment, the reality is that much of our mchining activities preclude the use of such automation. We are not in general, producing repeat parts of exacting dimensions, but one off parts that require individual setups fo each item produced.
 
CNC is an exciting part of our hobby but, in my opinion has limited appeal for the general model engineer and should therefore be given similar exposure in the magazines. 3 articles in one magazine is definitely overkill.
Thread: 1440 lathes
24/05/2011 16:26:43
The Chinese machines 'out of the box' are generally very acceptable. With discussion with the supplier, most, if not all concerns/issues can be resolved prior to delivery. I found a couple of issues with my machine which required minor adjustment and Warco engineers were more than happy to talk me through the best procedure. My machine has a build date in 2004. I do not know if the newer machines are better or worse however, my experience with Warco and Roger in particular is that they are most helpful in resolving issues with their machines. I am fortunate htat they are local to me so if I have a problem, I can go and talk to them, that said, their telephone support is very good (in my experience).
All said, I have had dealings with Chester in the past and they also provide good support. I do not want to present a biased view, I have simply chosen Warco as they are local to me and therefore convenience dictates...
The Chinese built machines represent good value for money, they are not Harrisons or Colchesters or DSG's but you need to evaluate your requirements against cost, spares availability etc etc.
At the end of the day the choice is yours, on my budget the middle eastern route was the best option given that a Harrison M300 solid bed generally sells for over 2500, without accessories...
 
Pay Ur money, take Ur choice
 
regards
 
Graeme
 
24/05/2011 14:26:36
Hi elanman,
I bought my 'Chinaman' as an ex demo from Warco. It's a GH1330 so slightly smaller than you are looking for, but so far, I have been veryhappy with it. The gears all seem to be good quality and suitably hardened. I did strip it down, clean it and flush the gearboxes but other than that it has not needed anything done to it.
 
I've jus notcied that there is a Warco GH1440 on home and workshop machinery site
 
regards
 
Graeme
Thread: Why so few profiles?
20/05/2011 22:19:08
I do not understand your statement in your last posting. There is no betrayal in a profile, it is only what you want to expose about yourself,. A posting betrays nothing!!. Please explain!
Thread: Worden tool & cutter grinder
20/05/2011 20:00:24
No prob Deric, if there is anything else you need to know, please ask, I have all the drawings etc as I built this from a Hemingway kit
 
regards
 
CB
Thread: Why so few profiles?
20/05/2011 19:56:13
Sorry John and ChrisI fail to see what you mean. A profile is intended to give a pen picture of the person. I have no problem in sharing my background and interests, why is it that the Brits are so reluctent to share their bckground and experience!
20/05/2011 16:17:32
Hi all, resurrecting this as it seems that members are still reluctant to post a public profile. It would be helpful if everyone here put a at least a simple profile, background, county, general interests would be useful for all to see. You only put in there what you want others to see, lets start sharing our backgrounds, interests etc, then we may all be more able to collaborate on projects etc, it's surprising what comes out of the woodwork when you share this kind of information.
 
regards
 
Graeme
Thread: Worden tool & cutter grinder
20/05/2011 13:14:52
Hi, the distance is around 5 3/8" or 137mm in new money
 
regards
 
CB
Thread: Performance Power Tools Pillar Drill - replacing bearings? Help
19/05/2011 19:03:49
Hi Jon,
I bought a 'second' machine from Warco a couple of years agos as it had runout in the spindle bearings. This was easily rectified by boring out the cast in spindle bearings and replacing them with bronze bushes.
I have the luxury of an industrial milling machine so this was easy for me, however, I am sure if you have a local engineering company, for a reasonable fee they will be able to machine the bearings for you.
I am in Hampshire if you are local I may be ablen to assist.
 
regards
 
Graeme
Thread: Stresses in machined crankshafts - Whittle V8
19/05/2011 18:55:11
Hi Steve,
I suffered a problem with my first crankshaft for the Whittle V8, although I bent mine rather than it breaking. I am making mine form EN16 which seems to machine a little more forgiving than EN8. That said, I have roughed it out and left it to 'relieve' for a while. I found that the main problem was finishing the centre bearing as having finished the other cranks, the resulting lack of rigidity caused the centre bearing to 'bounce' against the tool.
I am now looking at a jig to finish all the bearing surfaces in the mill so that all of the crank si supported during the final finishing operations. I feel that machining in the lathe is doomed to problems.
There are many threads regarding this issue, here is one,
 
Google Whittle V8 and you will find many threads on this subject, there is also a yahoo group for this engine build.
PM me to collaborate on this, I amin Hampshire if you are local I would gladly meet up to discuss the build

regards
 
Graeme
Thread: DRO,s fo Mini Lathes.
19/05/2011 16:29:33
Hi,
I had a DRO kit for the mini lathe which was purchased from . I retrofitted it to another chinese lathe although this did require manufacture of new leadscrews.
What is the TPI of your leadscrews, I seem to recall the kit requires a 20tpi leadscrew.
That said, If it is the same kit, then I would not recommend it. It uses rotary encoders which are directly linked to the leadscrew and as such provide no compensation for backlash, in fact, I removed the kit as it was useless as a DRO and replaced it with proper linear encoders and an external readout.
From personal experience, I would not waste money on this type of 'DRO'

Thread: Warco VMC drawing
19/05/2011 10:36:24
There is a picture of a VMC raising block here VMC Raising block in lathejacks 'Chinese Torture' album.
Thread: Consort sawbench and planer
09/05/2011 16:06:17
Hi Clive, have a look at www.bearingboys.co.uk, they sell imperial sized bearings and I have had excellent service from them in the past. They list 1/3/8" bearings.
 
regards
 
Graeme
Thread: Safety lamps for the lathe
08/05/2011 17:01:29
I have installed these in my mill lights, replacing the 20W halogen lamps. the light output is excellent
http://www.maplin.co.uk/mr16-led-lamps-503165?ordercode=N20HT
 
The lights I have are composed from microphone goosenecks and my old fish pond light heads. I will post some pics when I get chance, but they work extremely well and with the LED lamps, cost little to run, don't get hot and give very good illumination.
That said, the power consumption was the least consideration when my mill has a 3HP spindle motor and a 1.5HP feed gearbox motor LOL. But the light quality and cool running are definitely a bonus as is the lamp life. LED's suffer less from vibration fatigue!
 
CB
Thread: Bought a mill to go with the lathe
27/04/2011 17:46:44
Hi Derrick,
Just o get things back on topic ( no offence to any of the quips), which Mini Mill do you have?
 
I have an X2 clone waiting in the wings for a CNC conversion, just for a bit of fun, My primary mill is an AJX AJT4, fully manual, with DRO but will handle anything I throw at it
 
regards
 
CB
Thread: Technical and engineering drawing.
21/04/2011 23:48:30
I have skim read through most of this post and I must admit, to being very dismayed at the indifference towards correct engineering drawing standards.
1st angle, 3rd angle or isometric drawings were developed so that engineers could understand how a part was to be produced. It matters not which discipline you were trained in, the principles are the same. I was fortunate during my school and apprenticeship years to have studied most methods of representation. I would suspect that the majority of the 40+ generation of mechanical engineers would have had a similar experience.
That said, there will be a great number of people coming into this hobby with little experience of reading engineering drawings.
Even if it is a generalised article, I think it would be beneficial to all to have an article giving the basic principles of reading and understanding engineering drawings.
 
If ME and MEW are to continue, I would highly recommend employing a profesional draughtstman to reproduce designs to a common standard.
We all aspire to be engineers so why do we not adhere to common engineering standards.
Thread: Building lathe/mill in cast of concrete?
09/04/2011 00:05:22
Pure cast concrete will not withstand the stresses and vibration induced by normal rotary machining processes.
I believe the structural materiel you are aluding to is more akin to an epoxy granite based compound.
This is often used in industry to produce high strength, highly stable machine bases and superstructures.
 
There is a great deal of science in selecting the correct grade of epoxy resin and granite,silicon and quartz fillers that make up a suitable tructural compound for the intended purpose.
 
I have used some fairly crude epoxy granite based fillers to fill out the voids in the cast base and column of a low cost mini mill which has made significant improvements to the rigidity of the machine.
 
I suggest googling epoxy granite fillers and also take a look at http://www.cnccookbook.com/CCMillEpoxyFill.htm , there is some useful info there. I based my mix on the info on this site and it has worked very well.

One thing to bear in mind when building anything purely from an epoxy granite based compound, is that you will need to build a rigid mould and be able to vibrate the entire mould in order to compact the fillers so that teh epoxy is purely a bonding agent. The epoxy has little structural strength, it is the varying grades of filler that provide the strength and rigidity, in much the same way as traditional concrete does however, epoxy has greater long term stability properties than cast concrete.
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