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Thread: Your latest project
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6th May 2013, 11:16 PM #781Senior Member
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- May 2011
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- Castlemaine
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Structural Steel Work
Unfortunately I have not had a chance form much shed time lately as I am building a new house. However when I got the quote for the structural steel work, I thought I could save a few thousand dollars and get some "sanctioned" shed time.
The steel work consists of five 6.2 mt 200mm PFC beams joining 2 precast concrete walls and a few posts. The beams are bolted to cleats welded to steel plates in the concrete walls. First job was to drill all the cleats and chamfer the welded ends. I then tack welded all the cleats in place and got a mate who is a professional welder to weld them on.
Next job was to drill the bolt holes in the beams. As the beams are so long they would have to be drilled by hand on site. The brand new 16mm bit would not fit in my drill chuck so I chucked it up in the 4 jaw and turned it Down to 13mm.
As the beams are so long it is hard to get an accurate dimension on the centres, so I only drilled one end of the beam. I then lifted the beam into place using a duct lifter and bolted up one end. I the used a small bush I had turned up on the lathe to accurately drill a pilot hole, before drilling the 16mm hole once the beam had been lowered to the ground.
now all I need to do is install 3 posts in the end wall.
Cheers
Piersimage.jpgimage.jpgimage.jpgimage.jpg
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7th May 2013, 09:37 AM #782Most Valued Member
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- Jun 2012
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- SA
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Nice work. Pilot hole is a good idea. I've done similar on hand drilled large diameter stuff.
Seeing you turning down the drill shank made me laugh - I also turned one down last night.
Near new Sutton reduced shank drill, that was no where near accurately centred on the stepped section.
So much for current Sutton quality. Not like the old stuff.
Rob
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9th May 2013, 08:28 PM #783Most Valued Member
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- Murray Bridge S Aust.
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9th May 2013, 09:10 PM #784Most Valued Member
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- May 2011
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- Murray Bridge S Aust.
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If anyone is interested, I've found the editions of Model Engineers Workshop that contain the details for the Taper Turning Attachment,
178 and 179. I know someone asked about it but I forgot to look for them.
Still no new camera. Santa didn't leave me one, must have been a bad boy!!!!!!!
Kryn
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9th May 2013, 09:48 PM #785
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10th May 2013, 12:30 AM #786Most Valued Member
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- May 2011
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- Murray Bridge S Aust.
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- 71
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10th May 2013, 10:23 AM #787Most Valued Member
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- Oct 2007
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- Sydney
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- 3,112
Further to the above, if you happen to be a subscriber you get free access to all the back issues back to issue number one. I find it a very good magazine and have been a subscriber for about 5 years now IIRC. Like any magazine, some months there's a lot in it I'm interested in, some months not so much. But each month there seems to be at least one thing I find interesting. It's not cheap, but then again if you consider the whole package (ie 13 issues per years and access to all previous issues) then I think it's good value. While I could always just photocopy the article if I have that magazine, I like the fact that I can print out a copy of the project and work from those drawings rather than taking the whole magazine down to the workshop and trashing it.
Pete
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10th May 2013, 11:24 AM #788Dave J Guest
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10th May 2013, 03:03 PM #789Pink 10EE owner
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- Aug 2008
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- near Rockhampton
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- 6,216
Well now seems a good time to post these...
Cannot remember whether I have mentioned them before..
I made six of these rings out of large hollow bar... They were case hardened and then surface ground flat, the two in the middle are a matched pair, the one on the right unground...
I sent one to El Gregor the mexican bandit and Phil (not Other Phil which is Steamwhisperer).. Although neither have mentioned receiving them so maybe they never got them... Or they thought them crap and threw them in the bin
Generally they could be used for whatever they could be used for, tramming the mill was what I thought them good for, equally good for spacers or packing... I measured about 2 nanometers variation overall (beat that Josh ) then I woke up and measured 2 microns or thereabouts...Gold, the colour of choice for the discerning person.
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10th May 2013, 03:17 PM #790Dave J Guest
What diameter are they? And is that the same bar you used for the bandsaw clamps?
Dave
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10th May 2013, 03:27 PM #791Golden Member
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- Oct 2012
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- Australia
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13th May 2013, 12:40 PM #792Golden Member
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- Apr 2009
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- Ballina N.S.W.
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- 644
Mill Draw Bar Changer-Revisited
I originally made this impact driver tool changer back in 2009 and posted it here post #193. It has worked reasonably well but on occasions with one particular tool it sticks and I have to give the drive dogs a little tap with a brass hammer. I think the main problems are the impact driver cannot be held down firm enough and it is a bit small to dislodge the 40 series taper on this mill, it is also hard to control the amount of tightening.I felt it needed a redesign. I remember reading posts from DaveJ about his intention of fitting quick release tool changers to his mill, in his case two of them so I made contact with him, working on the theory that two heads are better than one. After going through all the issues Dave suggested fitting a Ball Thrust bearing my original set up had thick greased washers. I tried this it did improve it slightly but I still had the occasional hang up. Dave also mentioned that he had seen draw bars that were captured in place.
It was time for another modification so I sketched up a new draw bar design and a thrust bearing housing that could be added to my existing design. This would enable me to change back if it did not improve the situation. After installing the new set up and giving it a test for the last week or so with all of my tooling I have had no hang ups. As the draw bar is now captured when undoing it, I have found that I can reduce the compressors line pressure down to 60 PSI instead of the 80 PSI of the original set up.
A few photos and my sketch to help understand it. Thanks to DaveJ for his assistance. I have changed the impact drivers handle back to the original style as shown in the picture of the total assembly mounted on the top of the mill.
Bob
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13th May 2013, 12:47 PM #793Dave J Guest
Like I said in the email Bob, I like your design and your machining is really nice.
Dave
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13th May 2013, 01:14 PM #794Most Valued Member
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- Apr 2012
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Nice job Bob, I love the air gun.
ps. I still use an old milk crate
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14th May 2013, 10:16 PM #795Diamond Member
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- Feb 2013
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- Laidley, SE Qld
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Nothing very sophisticated here but it did involve milling drilling lathing welding and thinking. I needed to remove a 1935 Hudson steering wheel, the wheel is in very good condition so I had to be super cautious (overkill) in how I went about it. No new materials were harmed in the making of this puller.
Victory!
My 35 Hudson project arriving 2 years ago
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