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  1. #16
    Join Date
    Dec 2018
    Location
    NSW
    Posts
    586

    Default An unstable relationship

    My workbench and I are breaking up. It was an unstable relationship.

    This old workbench would be a ripper in most people's sheds. But my shed is not like everybody else's. It looks like it was concreted by a crippled geriatric with parkinsons... resulting in a 150mm fall over the 1.4m length of the workbench. So as a result, it was chocked quite a lot on 3 of the corners, and ended up being way to tall for anything other than a flat surface to accumulate junk.
    This is how it lived for the first year of its life in that location:



    So the plan was to make independently adjustable legs for this unit, so it would work in its location.
    50x50x5 angle was procured.
    The holes were drilled to 12mm at 50mm spacing. The other surface of the angle was also drilled the same, but offset 25mm. The idea with this was to allow the whole leg section to be flipped to effectively get 25mm height increments. This works with the adjusting bolts I have welded to the bottom of the table legs.



    Got lazy with layout, and ended up clamping and using transfer punches to transpose hole centers across. It was an accuracy win.



    Hole centers were then transposed to the existing table legs. The apex of the angle was ground to chamfer it to match the web on the angle that mates to it. Then the 'middles' of the old existing table legs were chopped out.

    M10 bolts hold it all together. I don't trust myself enough to fill m12 holes with m10 bolts with all the accumulated error I could have picked up along the way- al;though it did turn out OK, and I'm not going to return the bolts to the poor bugger at the shop who counted them all out for me... he'd probably have an aneurism if I asked.





    Table is now a comfortable 950mm high. Still retained all the sturdiness of the old legs. I have the ability to drop it right down, or lift it to stupid high if I wanted.

    I also added a 'splashback' to it for a bit more stability in the centre- the whole thing is made out of 50x50x5mm angle and 3mm sheet steel. Also stops things inadvertently falling off the back of the bench.

  2. #17
    Join Date
    Sep 2019
    Location
    Newcastle, AU
    Posts
    238

    Default

    Looks much better now. Reminds me that at some point I need to find a bar somewhere in the shed to hang the grinders off...

  3. #18
    Join Date
    Dec 2018
    Location
    NSW
    Posts
    586

    Default Stool sample

    After getting my pump on drilling 160 x 12mm holes into the workbench mods (eat your heart out Gazza!), it was fitting that I build something to allow me to sit at said bench comfortably.

    I needed a stool. But not just ANY stool. A 3-legged one.
    Readers may recall I'm not too fond of the floor surface I have- so a normal old 4 or 5 legged stool just would not be stable for when I want to use it.
    3-legged stools are quite hard to find and buy,so looked like I had to make it myself.

    A trip to the big green shed yielded 2x 2m lengths of 12mm reo bar. This is definitely a budget project.
    A trip to the drops stash yielded some pieces of old crusty and heavily galvanized angle (roughly 40mm x3mm)
    I had a scrap of ply for the bum surface, and a few metal screws.


    Design was mainly eyeballed, however some numbers came to mind as important:
    - 300mm dia for seat surface
    - The biggest equilateral triangle I could fit within that seat surface (an equilateral triangle circumscribed by a circle) was roughly 250mm each side.
    - I wanted the legs to splay out a bit over the seat diameter for the leg radius, approx shoulder width - I guestimated 400mm dia circle in which the legs would sit
    - Seat height needed was approx 750mm

    Angle iron got cut to 250 length and bevel cut on one side to 30 degrees (half the 60 needed for each corner of an equilateral triangle). Had to remove all the freaking gal from the welding areas. Zapped it together with the mig.
    The reo was cut to length, and then did the layout for the build on the bench:

    Decided that the dodgy way would be to just tack it together and bend it until it was passable, but had a the better judgement to build it upside down.

    Seat triangle bracket was traced to the table, each side was extended, then the angle bisected and drawn onto the table.
    The apex of the triangle was my 300mm seat base circle, so I added 100mm to this bisected angle line to make my 400mm circle points, indicating where the seat legs would sit in space




    Then it was just a matter of dusting off the old plumbob, and holding the leg correctly and tacking it in place when the tip of the leg sat directly above the point of interest.



    NAILED IT.

    Bent up the remaining reo bar into another equilateral triangle- welded the triangle shut, then slipped it over the top of the stool, then welded it to a known height from the ground level.



    Got some revenge on a tree and cut a circle for the ass part.





    Probably looks flimsy, but it quite sturdy for what it is (a $15 stool)- takes my 90 kilo frame quite easily. I was expecting to add some additional bracing but I don't think it's needed. It is also quite light and easy to move around and stash in a corner when not in use.

  4. #19
    Join Date
    May 2011
    Location
    Murray Bridge S Aust.
    Age
    71
    Posts
    5,942

    Default

    Sorry CK but the pictures aren't coming up!!!
    Comes up with Zoiks something
    To grow old is mandatory, growing up is optional.

  5. #20
    Join Date
    Dec 2018
    Location
    NSW
    Posts
    586

    Default

    Hosted on Imgur... external hosting. It's probably just wigging out at the moment - it does that sometimes.

  6. #21
    Join Date
    Nov 2011
    Location
    Port Sephens NSW Southside
    Posts
    123

    Default

    Kryn

    Have the same problem with Imgur & sometimes Tapatalk pics on Mozilla. MS Explorer works ok.

    JohnQ

  7. #22
    Join Date
    Aug 2010
    Location
    Near Bendigo, Victoria, AUS
    Age
    72
    Posts
    3,102

    Default

    What's wrong with uploading the photos right here on the forum??? Seems to be the easiest and safest way to have images in the threads....
    Cheers, Joe
    retired - less energy, more time to contemplate projects and more shed time....

  8. #23
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
    6,439

    Default

    Hi Guys,

    I agree ! Then you are not at the mercy of the likes of Dropbox and Photobucket !
    Best Regards:
    Baron J.

  9. #24
    Join Date
    May 2011
    Location
    Murray Bridge S Aust.
    Age
    71
    Posts
    5,942

    Default

    Quote Originally Posted by Commander_Keen View Post
    Hosted on Imgur... external hosting. It's probably just wigging out at the moment - it does that sometimes.
    I've never been able to see pics from I'm GRRRR nor from tapadrip or whatever it is!!!!!!
    To grow old is mandatory, growing up is optional.

  10. #25
    Join Date
    Dec 2018
    Location
    NSW
    Posts
    586

    Default

    Quote Originally Posted by jhovel View Post
    What's wrong with uploading the photos right here on the forum??? Seems to be the easiest and safest way to have images in the threads....
    Quote Originally Posted by BaronJ View Post
    Hi Guys,

    I agree ! Then you are not at the mercy of the likes of Dropbox !
    we all know there are knobheads like photobucket in the world who have held images to ransom, but small risk in the scheme of things for me- To be fair I've not had much luck uploading pics to the forum directly either... always end up on their side. Do we have unlimited storage here?

    On top of it all, externally hosted pics can't be easily linked elsewhere.

    Apologies to those who cannot see any pics I post. The hosting I use works everywhere else, and on balance, works for most.
    Perhaps try a different device.

  11. #26
    BobL is offline Member: Blue and white apron brigade
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    7,182

    Default

    Quote Originally Posted by Commander_Keen View Post
    Do we have unlimited storage here?
    I've uploaded 1344 images onto these forums and 3415 on the Woodies forum and no ones complained yet.

  12. #27
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
    6,439

    Default

    Hi Guys,

    I've over 2600 pictures stored, which is a lot of space ! On my computer they take over 2.9Gb.

    I did try to create albums of some stored pictures, but it seems all that does is duplicate them.
    Best Regards:
    Baron J.

  13. #28
    Join Date
    Dec 2018
    Location
    NSW
    Posts
    586

    Default

    I scored a pile of dead grinders through the week. They were destined for the skip bin.

    Upon testing some were completely rooted, other were still working.

    The pick of the bunch is a new model Metabo WPB 12 125- a 5" 1200W german made grinder with the paddle switch and fast brake on the disc.
    wpb-12-125-quick-0042800s_51_b.jpg
    Electrically it's OK, however the clutch has had a hard life which appears to be a result of the paddle switch (which disengages the clutch when slid forward and depressed) not disengaging the clutch plates correctly and consistently. Looks to be more an issue of the design of it, than wear and tear. Probably why it found its way onto the pile.
    ...now it's just a matter of working out a way to make those two parts engage together consistently, and I'll have a $350-$550 grinder for $0. Or I can remove the clutch entirely, and it will work just the same. Welcome to the shed grinder #6.

    https://www.metabo-service.com/en/sp...parts/00428191

    I dug up the service exploded diagram, which is In the above link,
    The way it works is that the paddle switch (17) slides down onto the clutch release slide (84), and paddle switch return pressure is given by a small spring, (85). The clutch plate assembly is actuated by component (83).
    I'll probably make a better version of part 84, but there is a lot of interference in the case and motor ducting which makes this easier said than done.


    Clutch arrangement. The spring pin on the clutch locates on the spring on the red housing section. This is pressed by the paddle.
    Attachment 384857

    Where the clutch used to be located- between the cooling fins and the gear housing
    Attachment 384858

    She's been a bit warm in it's past life.
    Attachment 384859

    Attachment 384860

    Happy to report that the grinder now works well, the quick brake feature is disabled. The only downside, is the spring return on the paddle switch is no longer there. Should be a robust unit.

  14. #29
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
    6,439

    Default

    Commander_Keen, there seems to be an issue with your attachments !
    Best Regards:
    Baron J.

  15. #30
    Join Date
    Dec 2018
    Location
    NSW
    Posts
    586

    Default

    Hopefully this works.
    Same pics as should be above.
    Grinder now clutchless.
    It was a stupid way which the disengaging mech worked anyway... definitely a 'weak link' in the whole design.

    IMG_1364.jpg
    IMG_1365.jpg
    IMG_1366.jpg
    IMG_1367.jpg
    IMG_1368.jpg

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