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    pre drilling for holes

    I am endlessly amused by you, please do keep it up :D
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    pre drilling for holes

    The only relevance of that statement is that a reamer is not a drill.
  3. N

    pre drilling for holes

    10mm pilot for 11mm final? :D That's most of your problem right there, running it at 500rpm with 0.5mm engagement compounds the mistake as it will rip the edges off a drill bit more often than not, a 5mm pilot would be better. This is not a case of a drill fault, it's tool abuse ;-)
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    Myford's metal lathes

    Every ME with a Myford thinks his Sow's Ear is a Silk Purse, they're mostly over priced for what they are. Funny that, since as a breed MEs tend to be tighter than a gnat's chuff :D
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    Myford's metal lathes

    The conical Super 7 bearing system is also good for over 2000 rpm. ;-)
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    Soldering or brazing aluminium help

    Get a tube flaring kit or have it done professionally.
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    Myford's metal lathes

    It's an easily misunderstood system but the tapered Hydrodynamic bearing on the Super 7 spindle nose is very good and can deliver remarkable accuracy even by modern standards.
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    Myford's metal lathes

    I was at the Doncaster show, I kept expecting to see Tumbleweed roll across the hall! If they weren't the "Big Bore" they weren't "New", the base price for the new big bore is over double that! ;-) Add to that the fact that the "Big Bore" has a very disappointing headstock through capacity of...
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    Myford's metal lathes

    www.lathes.co.uk
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    Myford S7 Chuck Lock

    It is, with a collet chuck on a back plate it gives you capacity up to and over the standard Myford spindle capacity, I use ER40 which gives me capacity up to and above my custom Super 7 30.5mm through capacity. It's good when a man knows his limitations, even when he falsely foists them upon...
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    Who makes the best small drill bits?

    I buy from a commercial tooling supplier who supplies machine shops, they don't carry anything but good quality.
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    Interpreting Cutting Speed Tables

    I have CBN Welcome to reality............... :D
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    VFD Wiring

    Buy based on quality and support, you'll actually be better off in the long run. I just had a Siemens Micromaster Vector VFD fail, it's about 20 years old and was ex-industrial when I bought it about 15 years ago, Siemens still offer all the documentation for it in good, clear, comprehensive...
  14. N

    Making a circlip

    How long is the gear? I've seen split spring steel rings which can be manipulated over/past large items on a shaft, think "Slightly less than one turn of a Slinky", you can get such a thing in nearly anywhere and your only critical dimensions are then ring OD and thickness.
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    Making a circlip

    That looks like there is no groove for a circlip?
  16. N

    Making a circlip

    Bend a wavy circle from spring wire.
  17. N

    How to calculate for single to three phase

    That depends on several factors including the fan, I use air filter foam on the air intake of some of the 3 phase motor fans to reduce the noise when I run them faster.
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    How to calculate for single to three phase

    Some cheap motors will have an issue below 2x rated RPM, some good motors have no issues well above. I run a 1hp motor at 7000rpm on a daily basis, having had no issues over 5 years. If you buy a good quality VFD the rating is the rating, you definitely do NOT need a higher rating for...
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    How to calculate for single to three phase

    This is far less of an issue in practice than is suggested by the way this is trotted out whenever use of a 3 phase with a VFD is mentioned. I use a 750W motor with a Siemens VFD on my Super 7 lathe and with the belts set one below top speed I don't have to resort to the back-gear for tapping...
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    Myford S7 DRO Modification

    I went for option 4, a parallel motion slide built from cheap ground rod and linear bearings carrying the scale & read head outboard at the back of the lathe out of the way of the work, chips, lube, coolant etc.
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