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  1. #631
    Join Date
    Aug 2008
    Location
    near Rockhampton
    Posts
    5,669

    Default

    Today or yesterday I learned that when you replace the wheel motors on your dingo mini loader which means pulling the engine out and other fun stuff, after you put it back together the machine runs much better when you tighten all the internal steel hydraulic lines rather then leaving the very hardest to get to one loose.
    Gold, the colour of choice for the discerning person.

  2. #632
    Join Date
    Sep 2011
    Location
    Emerald Central Qld
    Posts
    294

    Default

    RC, Even better when its all back together and you see a box of seals under the bench!!!!!.
    Dont ask .

    Michael

  3. #633
    Join Date
    Jul 2006
    Location
    Athelstone, SA 5076
    Posts
    3,483

    Default

    what did I learn the other day about polar fleece and hot swarf...not a bloody thing...I just ruined another fleece jacket...this time a good one....

  4. #634
    Join Date
    Nov 2010
    Location
    Gippsland Victoria
    Posts
    606

    Default blackening, purpling, turning stailess & slotcutting

    Had a great day today. Lotsa learnings.

    1. How to blacken mild steel (daggy black bar) - was reasonably easy heat it up and dunk it in engine oil, repeat a few times. The black pawn in the photo is 45mm tall and approx. 12mm max diameter

    2. I can cut stainless steel no worries at all with a HSS knife tool on my 9" hercus - 1" diameter bar running at either 500 or 700 rpm left a nice finish - was a pleasant surprise - repeated 0.100" cuts no problems - I'd read that stainless steel would work harden and the 2nd cut would be terrible.

    3. My stainless steel swarf produces magical peacock blue/purple colors when heated so Michael G's suggestion that I make chess pieces out of stainless & zap them to get the colour is looking good, I reckon the black pieces will look great as blue/purple.

    Have got a fairly puny gas torch, probably time to get something bigger for further blackening and purpling of bigger chess pieces. A bullfinch was recommended to me some time ago on this forum.

    4. I am still pretty hopeless using slotcutting mill bits, after succesfully cutting a good stainless steel blank on the lathe, made mess of the top of a rook - didn't get a nice plunge at all and the slots are daggy and yes I did tighten the gibs. Will try again using a 4 flute end mill and rotating the workpiece 90 degrees and then cutting the slots with the side of the cutter rather than the tip. Will try and drill the hollow rather than plunge a slot cutter. Ruined a slot cutter so learned not to try that way again.

    5. Fairly odd thing - the steady on the lathe tended to grab the stainless bar and stall the lathe, ended up not using the steady and running a shorter workpiece - have never seen the steady behave so badly before - is that something to do with the nature of the stainless ? I dont know what spec the stainless is I got a 6 foot length at a garage sale previous owner was using it as a weightlifting bar.

    Bill
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  5. #635
    Join Date
    Sep 2012
    Location
    North Yorkshire UK
    Posts
    2,047

    Default

    Hi Bill,

    Nice job on those chess pieces. I really like the blacking on that pawn.

    The problem that I have found with machining, drilling whatever stainless is that if you allow the cutting tool to rub even for a fraction, it work hardens and blunts the cutter. I've got a couple of hacksaw blades that have lost teeth just sawing stainless bar. It can be horrible stuff at times, I suppose a lot does depend upon the grade though.
    Best Regards:
    BaronJ.

  6. #636
    Join Date
    Jul 2010
    Location
    Melbourne
    Posts
    8,249

    Default

    Quote Originally Posted by eskimo View Post
    what did I learn the other day about polar fleece and hot swarf...not a bloody thing...I just ruined another fleece jacket...this time a good one....
    I'm not sure "liked" is exactly what I was after, but I've been there. I bought a couple of dust coats which I normally forget to put on until halfway through the first real cut.

  7. #637
    Join Date
    Jun 2010
    Location
    Canberra
    Posts
    897

    Default

    Today I learned that when installing a hydraulic cylinder, using an air compressor to move the ram is a great deal more "exciting" than using actual hydraulics.

  8. #638
    Join Date
    Nov 2010
    Location
    Gippsland Victoria
    Posts
    606

    Default

    Learned that these cam type bicycle seat clamps are quite effective for carriage stops and if you look around can be had for between $1-$2 +free postage on ebay. They are documented in various forums scattered around the web.

    Color Bike Bicycle Post Seatpost Clamp Quick Release Seat Bolt Binder Skewer | eBay

    Lathe fast clamp Carriage stop - HomemadeTools.net

    Wouldnt be hard to make but for <$2 am going to try some more for some other jobs.

  9. #639
    Join Date
    Jun 2007
    Location
    Ipswich QLD
    Age
    62
    Posts
    1,608

    Default

    I discovered that the left foot/shin area is the best place to drop a DTI magnetic base it stops it being damage the base that is, it also stops the concrete floor from being damaged. Thank goodness the DTI was not attached.
    The resulting 25mm gouge down my shin where the corner dug in and blood soaked sock/s LOML soaked the first one to remove blood stain only an hr latter to have to do sock 2. Rest of day sitting with foot up.

  10. #640
    Join Date
    Jan 2011
    Location
    Far West Wimmera
    Age
    58
    Posts
    4,095

    Default

    Quote Originally Posted by steamingbill View Post
    Learned that these cam type bicycle seat clamps are quite effective for carriage stops and if you look around can be had for between $1-$2 +free postage on ebay. They are documented in various forums scattered around the web.

    Color Bike Bicycle Post Seatpost Clamp Quick Release Seat Bolt Binder Skewer | eBay

    Lathe fast clamp Carriage stop - HomemadeTools.net

    Wouldnt be hard to make but for <$2 am going to try some more for some other jobs.
    Great idea. I don't need a lathe stop, but I can see that there could be many uses for these. I am going to order some so I have them on hand. Best way to remember an idea like this.

    Dean

  11. #641
    Join Date
    May 2011
    Location
    Murray Bridge S Aust.
    Age
    66
    Posts
    3,562

    Default

    Wheelin, hope the leg heals soon


    Bill, thanks for the tip on the seat clamp, can think of several uses already.
    Kryn
    To grow old is mandatory, growing up is optional.

  12. #642
    Join Date
    Feb 2015
    Location
    Oz
    Age
    67
    Posts
    815

    Default bicycle seat post cam clamps.

    The original belt tensioner on my lathe was secured via an allen key which was a PITA to get at so, I made a new tensioner and used a cam clamp to secure it in place. I have a drawer full of these bicycle cam clamps, very handy.
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  13. #643
    Join Date
    Nov 2010
    Location
    Gippsland Victoria
    Posts
    606

    Default

    Became obsessed with making a copying jig to ensure all my chess pawns were identical, failed miserably, but enjoyed having a go.

    So what did I learn ? Sometimes it better to just "do it manually" rather than waste a lot of time failing to build a fancy jig to help "save time" and be more accurate ................ who cares whether my chess pawns are + / - 0.008".

    Whilst googling copying jigs, stumbled across a thread on UK Model Engineering forum discussing the idea of lever and cam driven tools and wondered why I've only ever seen them on the internet ....... never seen them in the flesh on a tool in a showroom.

    Imagine driving your parting tool into the workpiece using a lever or a cam - similar to lever driven tailstock drills, or those tools that scratch graduations on a dial face or the fast retracting threading tool holders.

    Pultra 15/50 capstan unit and cutoff side for sale

    or stick a parting tool or an all round general knife tool on one of these ? 5th and 6th picture down the page.

    Page Title

    Bill





    Bill

  14. #644
    Join Date
    May 2011
    Location
    Murray Bridge S Aust.
    Age
    66
    Posts
    3,562

    Default

    At least you tried Bill. Thanks for the pics, sometimes I wish I still had my capstan lathes, makes it easier to do production type work. Making 150 stepped pins 6 mm diam X 10 mm then 9 mm X 10 mm on 12 mm diam rod to hold discs for painting.
    Nothing real fancy but a pain in the proverbial none the less.
    To grow old is mandatory, growing up is optional.

  15. #645
    Join Date
    Oct 2015
    Location
    Colorado
    Posts
    4

    Default

    Quote Originally Posted by steamingbill View Post
    Lathe fast clamp Carriage stop - HomemadeTools.net

    Wouldnt be hard to make but for <$2 am going to try some more for some other jobs.

    Hey, I know that site

    Good find, I had forgotten about that trick. Those bicycle seat post clamps are often high quality and easily scrounged. Great ingredient for a variety of homemade tools.

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