Here is a list of all the postings Tony Pratt 1 has made in our forums. Click on a thread name to jump to the thread.
|Thread: How to make an accurate internal hole|
John, boring to size is the way to go, more control and concentricity guaranteed, reamers seem attractive but can do strange things.
|Thread: Gib Strip Material|
Flat Ground Stock untreated is a good suggestion but if you harden it you may get flatness problems.
|Thread: 2 piece collet ?|
James, splitting the collet after turning will not make anything elliptical! All diameters, threads and lengths will not change in the splitting process. The turned diameters will still be true cylinders. If you haven't got a stub arbor and suitable slitting saw avaliable, careful use of a junior hacksaw should be ok to make the split.
Conventional method is to machine first, then split, why can't you do this, as you mention splitting before machining in your post, I'm not sure if super glue will cut the mustard? Also what machine tools have you?
|Thread: Machining what am I doing wrong?|
Check centre height of tool, you are using carbide tools so faster rpm is usually better. Try cutting oil and slower feed. What diameter steel are you using?
|Thread: Making a gear cutter|
Hi Mogens, I seem to recall he is a member of this forum but I can't remember how to search for an individual?
|Thread: This months MEW are 3 CNC features two too many|
Good point Steve, I hadn't considered that.
CNC gets the thumbs up from me, it's not new technology and has been around for years. The editor can only print what articles he receives so he must be getting more CNC biased at the moment and he cannot please everyone all the time!. Just remember CNC is only a tool and like any tool it has it's uses and if you don't want to use it you don't have to.
|Thread: Technical and engineering drawing.|
Dave, your are quite right, if Sam's little test was supplied with all the necessary information at the beginning it wouldn't have been a test and I could have spent more time cutting metal rather than scratching my head and I believe that is the whole point! I used to know the drawing standards years ago but like many things they are filed away in a forgotten part of my brain. In the context of all engineering work the drawings should be clear and unambiguous so the part can be produced in a timely and efficient manner, this applies both to amateur and professional drawings and in theory should be a simple process to follow.
People of a certain age do have a lot of knowledge to pass on but we all tend to get impatient with the young as our fathers and granfathers did, I have taught many apprentices and now my 19 year old son Toolroom techniques and I really do have to remind myself that they are only just starting out on the journey of life.
Hi Sam, doesn't look like any one knows the answer to your trick/puzzle judging by the lack of responses.
|Thread: Clarkson Collet Threads?|
Google search provides the information that the thread is 20 tpi for all sizes with a Whitworth form.
|Thread: Bench grinder|
This came up on another forum and got me thinking, China, India and the rest can make quality stuff far cheaper than we can for many reasons that I won't go into but why is much of it such utter rubbish, it can only be corporate greed at the highest level? We are now a throwaway society in an era when we are meant to be preserving our environment / resources etc a definite conflict of interests there. Sorry if I am drifting OT.
Hi Chris, I think the term is badge engineering? I presume Record like many other companies are buying stuff from our Eastern cousins and sticking a "Record" badge on it which I suppose is also not made by Record. Starrett is I believe ruining their reputation in America for this type of practice, you pay their prices but don't get their quality, a bad deal in my book.
Ian, they are not flash they are properly engineered and manufactured to a decent quality, something of a rarity these days. Size is really up to you, I have a HP7150 and it does everything I need, do you really need a 8" grinder?
I second Creusen you will only need to buy one! I bought 2 far eastern grinders before and they were not good, I gave up trying to "improve" them and bought quality which I should have done in the first place.
|Thread: Suggestions please.|
Graham, excellent ideas coming out of this posting! Very ingenious to use 2 rollers & 2 rules to get your angle, however I would stick to a sine bar and clock to check your tool it's much more user friendly and from experience projectors can give spurious readings even the industrial ones made for the job.
|Thread: Greenwood Tools - Excellent Service|
Andrew, from bitter experience I now change my tips over an empty box to ensure that when I drop the screw I can actually find it again.
Very interesting posts one and all. It's become very obvious that we all have something to bring to the table for us to learn from or not as the case may be.I have really enjoyed all the discussion that Donald instigated, long may it continue.
MGJ, have you seen the price of an F1 car or aircraft , if you can throw enough money at a component you will get it right eventually with no concessions. I am frankly amazed that we can't make steel, weld it then machine it flat, have we really got that bad?
When I was in a Toolroom environment it was a fact that the production workers didn't even understand what, why or how we were making things, but were always saying " why is it taking so long, I could do that 5 times quicker". The first part is oh so true,the last part I added for David's benefit.
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