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  1. #1
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    Default Kerosene and Knurling

    I was making some screws the other day for some table adjusters and needed to knurl the 1214 I was using.

    Previously I have used thin spindle oil, heavier engine oil and ATF as lubricant during the knurling process, resulting in a chip filled slurry. The results have been acceptable IMO but it is difficult to see clearly the depth and finish of the knurl during the knurling.

    I had some kero at hand so I gave it a go. No slurry, the chips washed away resulting in an easily observable knurl. I used a stiff bristled Super Cheap parts cleaning brush to apply the kerosene which resulted in kerosene being flicked everywhere. Next time I will use a squeeze bottle to application and a cake tray for collection.

    IMG_20190625_091311034.jpg IMG_20190625_110426498.jpg IMG_20190625_111510018.jpg IMG_20190625_152653_01.jpg

    BT

  2. #2
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    1214 steel is rather soft and very easily knurled WITHOUT and lubricant at all.

    https://www.ebay.co.uk/sch/i.html?_f...03720&_sacat=0

  3. #3
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    Quote Originally Posted by mardtrp View Post
    1214 steel is rather soft and very easily knurled WITHOUT and lubricant at all.

    https://www.ebay.co.uk/sch/i.html?_f...03720&_sacat=0
    Well there you go , live and learn.

    I'll try the kero next time I have a go at knurling some 4140.

  4. #4
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    NSW
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    Good one Bob. Yeah I'll be using a squeeze bottle next time too. Last time I used a brush and I poked in the wrong place with exciting results.

  5. #5
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    Thanks Picko,

    My parts brush is short a number of bristles. Grated nylon isn't a knurling enhancement!!

  6. #6
    Join Date
    Sep 2012
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    York, North Yorkshire UK
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    Hi Bob, Guys,

    Very nice knurl pattern on those parts.

    The behaviour of different cutting fluids and pastes is surprising ! I don't think that there is just one that you can say is the right one for all materials. I also use diesel / kero in a squeeze bottle, along with WD40, Trefolex and some others.
    Best Regards:
    Baron J.

  7. #7
    Join Date
    Nov 2007
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    melbourne australia
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    Two posts in one day Bob. You're spoiling us! Glad the kero came through for you. Unfortunately the smell of it (and diesel) makes me want to puke. Maybe all those years working in a petrol station as a kid.
    Chris

  8. #8
    BobL is offline Member: Blue and white apron brigade
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    Quote Originally Posted by jack620 View Post
    Two posts in one day Bob. You're spoiling us! Glad the kero came through for you. Unfortunately the smell of it (and diesel) makes me want to puke. Maybe all those years working in a petrol station as a kid.
    'I'm the same with Kero and was using the other day to turn some acrylic but I got away with it because of the ventilation I have in my shed.

    For me kero aroma reminds me of a holiday as a kid where I got sick as and the place we were staying in had a kero fridge. Even since then kero smells make me slightly nauseated.]

  9. #9
    Join Date
    Dec 2013
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    Nice job Bob, and nice to see your clear pictured posts.
    I remember years ago where you questioned me about knurling the 50 odd tool post adjusters I was making using coolant instead of oil etc.

    I was using a makeshift coolant setup at the time from my mill to wash away the chips and a magnet picking them up in the bottom.
    The difference is night and day even in mild steel as you have seen The knurls came out nice clean and crisp like yours have.

    Here is the post, then I just see it went off about the knurls tool.
    Making Dickson style quick change tool post holders (picture heavy)

    Have you thought about a simple coolant setup with a tray that sits on your lathe and a $6 pond pump? It would save the Kero smell and be recycled.

    Dave J
    Using Tapatalk

  10. #10
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    Quote Originally Posted by Dave J View Post
    Nice job Bob, and nice to see your clear pictured posts.
    I remember years ago where you questioned me about knurling the 50 odd tool post adjusters I was making using coolant instead of oil etc.

    I was using a makeshift coolant setup at the time from my mill to wash away the chips and a magnet picking them up in the bottom.
    The difference is night and day even in mild steel as you have seen The knurls came out nice clean and crisp like yours have.

    Here is the post, then I just see it went off about the knurls tool.
    Making Dickson style quick change tool post holders (picture heavy)

    Have you thought about a simple coolant setup with a tray that sits on your lathe and a $6 pond pump? It would save the Kero smell and be recycled.

    Dave J
    Thanks Dave,

    I remember your tool holder thread well. A colossal effort!

    I've shied away from water based coolant because the one time I did use it I ended up with some corrosion on my, then pristine, cross slide. While I'm not a big fan of kero and its accompanying smell I can put up with it.

    I've always been keen to try cutting oil but have balked at its cost. For the amount of knurling I do kero or similar in a squeeze bottle will probably suffice.

    I do need to take a close look at Bob L's coolant setup he has on his Hercus lathe and another closer look of the mist system he has devised for his little Hercus mill.

    Bob.

  11. #11
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    Quote Originally Posted by Anorak Bob View Post
    Thanks Picko,

    My parts brush is short a number of bristles. Grated nylon isn't a knurling enhancement!!
    Well! Thank god for that!
    I thought it was only me that did things like that.

    Grahame

  12. #12
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    Default Kerosene and Knurling

    Hi BT
    A nice job of knurling and your usual great photo's. As you know I have been using a mix of used ATF and kerosene in a mist cooling system on my lathe and mill for some time now. When knurling I have always used a flood system of just the used ATF oil, a little while ago I cut a knurl and used the mist coolant system and adjusted the flow rate up a bit and found this worked really well as the increased flow and extra air pressure blew away any loose chips and also enabled better vision of the knurl.As I only had one short knurl to cut I did not take a picture but I will next time.
    Bob

  13. #13
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    Quote Originally Posted by Anorak Bob View Post
    Thanks Dave,

    I remember your tool holder thread well. A colossal effort!

    I've shied away from water based coolant because the one time I did use it I ended up with some corrosion on my, then pristine, cross slide. While I'm not a big fan of kero and its accompanying smell I can put up with it.
    You can get odourless kero in Bunnings. Friends of mine use it in their Primus type stove on their boat. It's a bit more expensive than the blue stuff but burns cleaner, not that it matters for your purpose.

    PDW

  14. #14
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    Quote Originally Posted by PDW View Post
    You can get odourless kero in Bunnings. Friends of mine use it in their Primus type stove on their boat. It's a bit more expensive than the blue stuff but burns cleaner, not that it matters for your purpose.

    PDW
    Thanks for that, I always use Kero/way oil mix so my shed smells a bit like Kero, and the wife hates the smell of it on my clothes, I will look into this.
    Using Tapatalk

  15. #15
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    Talking about Kero reminded me about prices and quantity, has anyone else noticed over the past 3 years the containers have gone down to 3ltr but the price went up again.
    I used to buy this stuff for mum for our heater at the local servo for 20 cent's a little in a glass 4l orange juice glass bottle.
    Using Tapatalk

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