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Type: Posts; User: BobL

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  1. Replies
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    Useful tip about removing the tip on a spring...

    Useful tip about removing the tip on a spring loaded punch to sharpen it.

    To sharpen tips on stuff that fits in a cordless drill I spin the tips against an unsupported part of a Linisher belt. ...
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    Both my spring loaded centre punches won't run...

    Both my spring loaded centre punches won't run true in my drill press, while the non-spring loaded ones have square shanks
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    I've seen this sort of thing a few times...

    I've seen this sort of thing a few times especially amongst students and its a classic confusion between "Difference" and "uncertainty".
    Metrologists (not meteorologist) would shake their heads in...
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    That one is a flat belt Hercus. As BaronJ says...

    That one is a flat belt Hercus.

    As BaronJ says tapping under power is not easy.
    The only power I use when tapping is "reverse" to speed up tap removal.
    Before doing that I make sure the tap/work...
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    I did a few more BOTE calcs and worked to on...

    I did a few more BOTE calcs and worked to on average I use about 10g of ATM/kero a month or about 1g per task.
    Shed is 100 m^3
    If ALL the ATM/Kero is aerosolised and spread across the shed that's...
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    One thing to be aware of is just because...

    One thing to be aware of is just because something is made with natural ingredients doesn't automatically mean its safe.
    eg Sulphurized Canola oil has the same TWA vapour OHS exposure levels as most...
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    I had a dream about a Colchester lathe last...

    I had a dream about a Colchester lathe last night.

    I dreamt I finally got to see what was inside my parents neighbour's sheds.

    As kids we always wondered what he had in these sheds as he...
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    Yes this is a good point. Lets start with...

    Yes this is a good point.

    Lets start with ROCOL.
    Some MSDS show no bio effects for ROCOL, but the MSDSs originating from AUS supplies show the same time weight average (TWA) as for general...
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    The largest round-over bit I have seen BIL use is...

    The largest round-over bit I have seen BIL use is a 25mm OD cutter.
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    It's not screw but similar to what other members...

    It's not screw but similar to what other members used ie 75% ATF and 25% kero, but don't forget that's in a mister.

    I use meths in a trigger bottle on Al - it leaves zero mess
    BUT
    It does need...
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    Sorry about that. My list of excuses are - was...

    Sorry about that.
    My list of excuses are
    - was stuck parked waiting for over two and half hours for SWMBO to have her COVID jab.
    - was replying on mobile- on which I am all thumbs and no fingers...
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    Wax or meths can be used as a lube for Al.

    Wax or meths can be used as a lube for Al.
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    Don’t know many people who like futzing with...

    Don’t know many people who like futzing with chemicals etc as much as I do but none of those inspire me that much especially given the time requiredThe 3rd video dabbles with sulphuric acid which is...
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    BIL is an Al boilermaker on shipbuilding duties...

    BIL is an Al boilermaker on shipbuilding duties at Naval base here in WA. His toolkit includes a bunch of ww tools including hand held WW circulars,, jigsaws, and routers. He regularly slightly over...
  15. Thread: New to the game

    by BobL
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    in no particular oder State of the ways, the...

    in no particular oder

    State of the ways, the cleaner the better as its a useful indicator of how well the machine has been treated. Look for dents and nicks and wear patches
    Check gears for...
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    Unfortunately not many lathes have an exposed...

    Unfortunately not many lathes have an exposed flat section of spindle that can be used in the way shown on that video.
    In that case a piece of hex bar in the chuck and an impact driver usually works...
  17. Thread: Sine Bar

    by BobL
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    FWIW the scissor action knurler I purchased...

    FWIW the scissor action knurler I purchased recently came from India (Delhi)
    Ordered March 9 arrived March 22.
    Could be different these days.
  18. Was looking at pics of your lathe in your first...

    Was looking at pics of your lathe in your first thread.

    I'm not 100% sure this is the pulley system is original and it looks like it has been substantially modified to enable the motor to be...
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    There's a Balaklava in SA 25k east of Wakefield....

    There's a Balaklava in SA 25k east of Wakefield.

    I also recently acquired one of those shapers - where the heck am I going set it up is giving me a bit of a headache ATM.
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    2020, the 3 knurled knobs on the wool carding...

    2020, the 3 knurled knobs on the wool carding machine
  21. It looks like an after market motor - washing...

    It looks like an after market motor - washing machine motor perhaps. I could be wrong.
  22. While they do look good, especially against the...

    While they do look good, especially against the wood, in terms of finish I would call them about average especially compared to what some members on this forum can produce. I used to balk at turning...
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    Cheers, SWMBO has been fair pumping wool through...

    Cheers, SWMBO has been fair pumping wool through that machine this morning.
    She's also made me sit though parts of a youtube video that shows all the accessories that such machines can use - HINT...
  24. If you want to get smaller pieces of HSS, ie 100...

    If you want to get smaller pieces of HSS, ie 100 mm will get you around 2 - 4 working bits depending on how you hold it, then try McJing ...
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    Thanks KB, That pic was taken in my electronics...

    Thanks KB, That pic was taken in my electronics room. :D
    SWMBO has a sewing nook in the family room that spills out to surround chairs and the coffee table etc, and she has also taken over the...
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    SWMBO has steady steely grey blue eyes, a #3...

    SWMBO has steady steely grey blue eyes, a #3 haircut, and is very laid back about most things.
    Her top interest is a horse, followed closely by perhaps quilting and sewing, but she has had a go at...
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    Before, This wool has been washed so it's quite...

    Before,
    This wool has been washed so it's quite clean already.

    392043

    After
    392044
  28. Replies
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    She's into a zillion things and has mainly used...

    She's into a zillion things and has mainly used wool to spin but lately she'd been "needle felting" - sculpting with wool.
    Here are some of her latest.
    The dog is meant to be a coyote howling at...
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    This is SWMBO's 2020 Xmas present finally...

    This is SWMBO's 2020 Xmas present finally completed about an hour ago.
    The gizmo is called a "drum carder" and is for carding wool.
    Raw wool is fed into the small drum via the on feed tray and the...
  30. The OP said it had mill scale and rust so it was...

    The OP said it had mill scale and rust so it was unlikely to be 316.

    Heres the RPM chart from the Text book of turning.
    392035
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    The screws have arrived at the gunsmiths and the...

    The screws have arrived at the gunsmiths and the word is that he is more than happy with the screws. And yes he is going use Loctite.
  32. I'll add my name to those saying you shouldn't...

    I'll add my name to those saying you shouldn't move up to the next grit if you still see scratches that are not a result of the grit being used.

    But I would not call those scratches but gouges and...
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    Rock dating using the uranium and lead...

    Rock dating using the uranium and lead concentration and the lead isotope ratios.

    These days they use an ion-probe mass spectrometer and fire a plasma beam at rock crystals in a machine like...
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    At work we used Inconel to make "bombs". The were...

    At work we used Inconel to make "bombs". The were called bombs because there was always a risk one would blow up and make a mess of the lab.

    The correct name for the "bomb" is a pressure digestion...
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    OR Dees blade weeeill cut

    OR
    Dees blade weeeill cut
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    Not good, hope you heal soon. It's not...

    Not good, hope you heal soon.
    It's not foolproof but I have a rule about not sharpening something like that until it has a handle - even a basic one - to be able to hang onto.
  37. Thread: Fan Duct !

    by BobL
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    Neat - I've made a few fittings like that. ...

    Neat - I've made a few fittings like that.

    WHen I had to make quite a few I even made a flange junction former as a heat mould to use on my woodie lathe.
    391954
    35 mm ring of PVC is pushed...
  38. Thread: Hardened Bastard

    by BobL
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    Nope - Induction hardening is produced by placing...

    Nope - Induction hardening is produced by placing the steel very close to a rapidly alternating magnetic field which sets up eddy currents inside the steel and makes it hot. Again nothing like what...
  39. Thread: Hardened Bastard

    by BobL
    Replies
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    291

    Interesting - files are already very hard - and I...

    Interesting - files are already very hard - and I seriously doubt they could be made harder than they already are by what you describe which as Grahame indicates does not include a quench step.

    If...
  40. How to tightly hold a bundle of small steel rods

    Im making another pair of these hand carders for SQMBO.
    These ones are made from 2mm regular steel TIG welding rods
    391912

    This time I'm using 3mm TSS rods.
    Cutting 48 equal length rods is...
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    I finally got around to make the M5 0.5 screws...

    I finally got around to make the M5 0.5 screws for my Nephews Telescopic sight.

    Following on from Anorak Bob's suggestion I purchased 10, M5 0.8 hex head bolts (26c each) with a long enough clean...
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    OTOH I don't blame you - its nowhere near as...

    OTOH I don't blame you - its nowhere near as clean as yours.



    Cheers bob - Much appreciated.
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    I've got one - just need to make the tool post ....

    I've got one - just need to make the tool post .

    Does Bohler-uddeholm have blocks of steel like your tool post?
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    Reminds me of going timber felling as a kid with...

    Reminds me of going timber felling as a kid with Dad.

    I did a number of jobs like carrying Dad's fuel and bar oil, lighting and tending fires to make billy tea for smoko, and most fun of all,...
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    Sorry - I wasn't suggesting hand held - What I...

    Sorry - I wasn't suggesting hand held - What I mean to say was they would even work in a vertical orientation - still need to be held mechanically but they don't need to be on centre. All that means...
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    My Al ship builder BIL uses a small hand held...

    My Al ship builder BIL uses a small hand held router and standard WW carbide rounding bits to round over some of his corner TIG welds. He's typically welding 12 -16 mm plate and by the time he's ...
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    Correct

    Correct
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    I've had my adjustable reamers for about 10 years...

    I've had my adjustable reamers for about 10 years and like you indicate, I use them mainly when I can't put the work in the lathe and use a boring bar.

    Here are a few tips - some are obvious but...
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    With the scissor action knurler height does not...

    With the scissor action knurler height does not matter. They could even be operated from directly below or above- all they do is clamp down on the work piece but it could be done from any height.
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    Yes I would have thought so but I haven't noticed...

    Yes I would have thought so but I haven't noticed that.
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