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14th Apr 2011, 09:10 AM #16Most Valued Member
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14th Apr 2011, 05:11 PM #17Golden Member
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Quote:
Originally Posted by Grahame Collins
I am told was designed so that it would fail .
Dawn claim that about the handles on the cast vices. I assume it applies to their built up ones. I'm pretty sure I saw it on the web page somewhere.
Stuart
Stuart,
Really? Wonder if they would exchange mine for a new one then? (Just joking!)
I bought it twenty years ago from a factory which was closing down where, from the appearance of the handle which is now S shaped, it had obviously had a hard life in the welding shop. If you look closely it has been broken and repaired by bronze welding below the moving jaw. Since the repair had been very competently done, and the vyce had seen considerable use in the welding shop after the repair, I reckoned it was worth the risk, and paid $20 for it. Twenty years later it is still going strong - best $20 I ever spent I think.
Frank.
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14th Apr 2011, 05:58 PM #18Most Valued Member
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Franco,
The vices I have heard of being broken haven't been from tightening, it's when the work held in the jaws was twisted. e.g. undoing some huge pipe fitting with a 6ft piece of pipe on the spanner.
There was a rumour at tech that if you did them up really tight on a hot day that they could crack when they cooled at night
Although in a welding shop if you have done something in the jaws real tight and then heated it up, maybe that would do it?
I have a vice like that one but its a Carter(never heard of them but then I've never looked either. I bet BT has one lol). It was a mess when I got it so its now blue. It had a hard life in a brake shop. The jaw lifts about 2mm as it closes. Still it was free so I can't complain to loudly lol
Stuart
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14th Apr 2011, 07:32 PM #19Senior Member
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I wish I had a Teacher like you when I was in school Grahame those vices look really neat I might have to make one of those vices for my mill at work
happy turning
Patrick
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14th Apr 2011, 09:18 PM #20
Avoid placing the tack bead in the middle of a run as you have to weld over it andd spoil the visual profile of the bead. Some place far too much tack volume and the weld has a big FXXXn hump in it.
Tacks are ideally placed at opposite ends of the item to be welded. Ideally diagaonally opposed as this helps prevent weld distortion.
Grahame
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14th Apr 2011, 09:57 PM #21
Ken,
The scriber project is for yr 11s and and I have yr 12s, 2 classes of them .
The scriber drawings were made available to the yr 11 teacher but at this stage he has got them chewing out work on Ms bar making a stepped drift.
Rest assured Ken old mate the scriber will be started next year when I get my new group of 11 s next year.
The other teacher has let his 11's start straight onto carbide .No instruction on use and they are snapping the points of them as they start the machines back into reverse etc.No reference to spindle speeds to match diameters .
I have the spndle speeds data from TAFe green book posted up on the store door.Same deal with the drill press speed data. I won't respond when they ask for a speed or rpm but have them consult the chart
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14th Apr 2011, 10:03 PM #22Pink 10EE owner
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[QUOTE=Grahame Collins;1304120]
The other teacher has let his 11's start straight onto carbide ./QUOTE]
hmmm I take it he is not paying for the inserts...
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15th Apr 2011, 12:38 AM #23China
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Stuart, Carter vices were around before Dawn, I have had a small 5" model for 40 years, I beleive Siddons which was The Dawn parent company at the time bought them out and closed them down to remove competition
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15th Apr 2011, 08:27 AM #24
[quote=.RC.;1304126]RC.
As they say don't get me started .
Theres a bit of a mindset there .
Some at school say that all Industry wants is training in carbide use.I say nonsense as not all kids go into manufacture.People who do one off repairs can't afford the big array of carbide tooling ,ie tools holders etc.
However a trained machinist can grind their own HSS and quickly effect a repair with minimum cost.
And s o it goes on.
Grahame
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15th Apr 2011, 08:58 AM #25Most Valued Member
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ta grahame..i'll keep that in my head..... somewhere.
I must admit I do do tack welds where I then need to go over...hopefully I'll be able to recall your tip when needed....but then it really doesnt matter to the appearance of my welds...they cant get any worse looking
I must practice welding more..i have a mig and its also a stick but cant get the hang of it (but it is easier than the old transarc)...some times the welds are good but this is very very rare...another reason why I own angle an grinder or two
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15th Apr 2011, 07:31 PM #26
Hi,
I have to write a power point presentation for the students on tacking so I can flick you are copy.
If you want a copy PM me and I'll send you one as an attachment.
You will need to instal MS power point reader or have a copy of powerpoint.
Grahame
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15th Apr 2011, 10:49 PM #27Diamond Member
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Hi Grahame,
If not too much trouble, can I have a copy too please? You can send it to r dot r dot gore at bigpond dot com, just make the obvious adjustment. Many thanks for your continued assistance to all forum members, and congratulations on getting through with at least some of your students, In just a few short years they will look back with fondness and gratitude to that 'grumpy old bugger' that taught them so much, and they will treasure those vices too. Regards,
Rob.
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17th Apr 2011, 04:29 PM #28Most Valued Member
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China,
Thanks for that, nice to know.
Stuart
p.s. been away for the weekend
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18th Apr 2011, 01:23 AM #29Senior Member
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- Riverina NSW
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[quote=Grahame Collins;1304212]
At work we use carbide for general turning and some milling but there is still alot of use for hss as we use it for thread turning and it comes in handy machining plastics etc as you can get a sharp edge, also is good for interrupted cutting where the carbide is more likely to chip.
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19th Apr 2011, 02:26 PM #30Senior Member
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This thread brings back a lot of memories for me back in 1988/89 i did metalwork as an elective for years 9 & 10 at Eden High School.
The teacher was really good to any kids that showed intiative and wanted to build something more advanced.
So a few of us made a torque wrench, Warren and Brown Style.
Never fully finished it still needed the clicker made up but I still have it stored away, think i might drag it out and finish it. I have a mate that can laser engrave the torque settings too. And yes it uses proper torque wrench steel for the critcal bit the teacher ordered that in for us.
Should be way more metal work and woood work for that matter in the high school system.
Cheers
Justin
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