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  1. Exclusive: Miami Anti-Socialist Caravan Makes...

    Exclusive: Miami Anti-Socialist Caravan Makes History, Attracting 30,000 Vehicles
  2. communist Marxist sand baggers, bunch of pukes ...

    communist Marxist sand baggers, bunch of pukes

    Death By Idea – Grrr Graphics
  3. OT value added in manufacturing good video

    watch video
    Joe Arvin at DuPage County Workforce Board - YouTube
  4. Replies
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    couple of tips make a hob, single point a cutter...

    couple of tips
    make a hob, single point a cutter out of tool steel , make it slightly bigger then the worm, turn it and mill it.
    look it up, on you tube or world wide web, then heat treat it.
    the...
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    what is the true position required? and what's...

    what is the true position required?
    and what's the depth,
  6. cbn plated machined well but could not hold form...

    cbn plated machined well but could not hold form
    let explain a few other details, if CBN plated wheels work great when it's moderate tolerance, in my world it's .0005 max.
    form wheels are...
  7. with precision ground gears , typically for...

    with precision ground gears , typically for aircraft application, these attributes have to be held
    lead (parallel )
    Involute (and can be tricky).0002-.0003 inch tolerance form of the gear
    total...
  8. I would rarely leave more than .010 stock per...

    I would rarely leave more than .010 stock per surface, and was usually .005 stock per surface, and I been doing this for 35 years,
    all different type of parts but mostly cylindrical, and harden or...
  9. read the links provided, it's not common to use...

    read the links provided, it's not common to use for steel, but hey it worked.
  10. It was recommended by our grinding wheel sales...

    It was recommended by our grinding wheel sales engineer, and it worked, it required less dressing, held size and form, the guys on the floor were happy with it.
    aluminum oxide works but requires...
  11. read page 4 & 10 for the dope...

    read page 4 & 10 for the dope
    https://www.uddeholm.com/app/uploads/sites/45/2018/02/Uddeholm_grinding-eng_t_R121214_e7.pdf
  12. I agree. That is such a weird suggestion for...

    I agree. That is such a weird suggestion for grinding steel of any kind.
  13. we had good luck grinding low alloy carburized...

    we had good luck grinding low alloy carburized parts, that were 60 HRc min case hardness, outside diameters, ang high precision gears,
    worked well on tools steels as well. but stock removal...
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    I guess we are discussing apples and oranges. I...

    I guess we are discussing apples and oranges. I discussing about long deep holes with 5x depth of the diameter. Most are bored then honed to true up.
    The diameters with large diameters have to be...
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    I can tell by your comments your full of it

    I can tell by your comments your full of it
  16. tool steel is hard to grind, the right wheel for...

    tool steel is hard to grind, the right wheel for this would be a silicon carbide grinding wheel. plenty of coolant as it will crack, aluminum oxide wheel will require dressing every part and will...
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    to true up a hole it has to be bored, jig ground...

    to true up a hole it has to be bored, jig ground or ID grind, depending on the type of part.
    edit: and I left out unconventional machining, Wire & electrode EDM, and others
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    bull, have you honed

    bull, have you honed
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    honing is only as straight as the hole all ready...

    honing is only as straight as the hole all ready is, honing will true up the diameter, otherwise it will follow the hole.
    if it needs to be straight then it needs bored or jig ground, run a sample...
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    also it always better to finish precision holes...

    also it always better to finish precision holes after heat treat, hone it leave minimal stock
  21. Replies
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    what is the material and what is the heat treat...

    what is the material and what is the heat treat required, .200 hole is small
    edit: the variance in heat treat will depend on the process used and will very with heat treaters, quenching medium used,...
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    it depends , is this a very low production, or...

    it depends , is this a very low production, or are you doing thousands of cylinders. don't take short cuts it will cause issues
    air gages is old school, if making high production, bite the bullet...
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    If the gear is ground, the bore must be ground...

    If the gear is ground, the bore must be ground also, runout must be .0003 Max, if it is a cut gear only, the runout can be .001 max or as good as the gear errors allows
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    when someone can not reply with a logical...

    when someone can not reply with a logical reasonable answer they start with derogatory stupid comments. it shows unprofessionalism. do you speak to your customers this way?

    turning and grinding...
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    bunch of dumb people here, Emanuel is correct,...

    bunch of dumb people here, Emanuel is correct, but you don't listen, proper way is to machine over wires, or tooling that locate the gear pitch diameter.
    if the od was machine concentric to the...
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