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Type: Posts; User: MattiJ

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    https://i1.wp.com/www.graciecombativeskc.com/Renns...

    https://i1.wp.com/www.graciecombativeskc.com/RennsportKC/M96/38.JPG?zoom=2&resize=640%2C480
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    Long bolts and thinned bolts are nothing...

    Long bolts and thinned bolts are nothing unfamiliar for me but I don’t get the second threaded section between two necked bolt sections.

    Could be to center something with the bolt but weird...
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    Pretty sure, also shown on many other pics and...

    Pretty sure, also shown on many other pics and the rennsport thread I posted just earlier. Looks like bolts thread to the crackshaft carrier.
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    RennsportKC::Anatomy of an M96 Engine Rennsport...

    RennsportKC::Anatomy of an M96 Engine Rennsport Kansas City - RennsportKC::

    I think these pictures are from same engine model. Still can’t fiqure out how the bolts work.

    Crackshaft carrier...
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    No. And the pictures of the engine I found made...

    No. And the pictures of the engine I found made it just even harder to understand.

    Twonpart thread doesnt make sense unless there is nut coupling to the end..
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    OT: why 2-part thread on Porsche head bolts?

    270272

    https://www.9xx-parts.com/tuotekuvat/900x600/996-104-180-58.JPG

    How do these bolts work and why is the thread 2-part? Head-cylinder-crankcase clamped with one bolt? Why?
  7. I want also 6 feet inconel drops 🤣

    I want also 6 feet inconel drops 🤣
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    Oven/furnace like you showed in picture is...

    Oven/furnace like you showed in picture is probably not that well sealed and most probably wont hold 5lbs(PSI??) positive pressure inside. Maybe 5 Inch h2o would be possible positive pressure.
    ...
  9. Maybe less common for ”end user” products like...

    Maybe less common for ”end user” products like calipers but relatively common for lab standards.

    New gage block set is useless if it doesn’t come with calibration certificate with stated...
  10. This is a common problem with factory...

    This is a common problem with factory calibrations and non-accredited cal labs.

    Maybe easiest(but not cheapest) way is to ask for ISO17025 accredited calibration. It always comes with measurement...
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    Sharp carbide inserts work really well. Average...

    Sharp carbide inserts work really well. Average steel specific insets are useless unless you get enough speed and doc. Aluminium specific ones are almost always enough sharp and work with tiny cuts...
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    I agree, bending angle for pull stud by...

    I agree, bending angle for pull stud by improperly seated toolholder is really tiny. If the toolholder retracts 1/2" from the spindle all hell is going to break loose even if the pull stud remains...
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    Their website says that the pull studs are...

    Their website says that the pull studs are hardened to 52-56HRC. The upper end of the range definitely gets pretty sensitive about grain size, surface quality(rust, machining marks and scratches) and...
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    Abrasive grit blasting with suitable grit and...

    Abrasive grit blasting with suitable grit and pressure might do the trick. Coarse grit blasted only for short time so that it raises some burs but removes minimal material?
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    30-taper pull stud force is what? 2000lbs max?...

    30-taper pull stud force is what? 2000lbs max? And 7mm shank on the pull stud?
    BOG standard 12.9 grade bolt has 1200N/mm2 ultimate tensile strength -->> 46kN tensile --> 10300 lbs
    Safety factor...
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    Why? Because with some products (not...

    Why?
    Because with some products (not necessarily inserts and not every market) there is 80% profit on the price and even smallest business customer gets 70% discount on list prices.
    Local...
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    Grade 8 or metric 12.9 bolt would give useful...

    Grade 8 or metric 12.9 bolt would give useful "reference" for whack-a-mole :D test. But if the pull studs fail with brittle failure without elongation there is no need for further testing, too...
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    Hammer whack test is better than it might sound...

    Hammer whack test is better than it might sound at first. If the part fails in brittle fracture with no plastic deformation it tells right away that the hardening has gone haywire or someone...
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    Mitutoyo 103-137 is about 60 AUD+GST if you are...

    Mitutoyo 103-137 is about 60 AUD+GST if you are bit lucky with campaigns (or dare to order from china!)
    OK, almost double price but so is quality. Your mic looks like cheapo quality even for chinese...
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    Can you get better pictures for us armchair...

    Can you get better pictures for us armchair metallurgist? Location and the look of the fracture look intriguing. How do the fractured parts "butt up" with each other?

    Edit: If this pull stud ever...
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    Yep. Lots of counterfeits, disappointing to see...

    Yep. Lots of counterfeits, disappointing to see that ebay is not doing much about it. Or manufacturers (foil hat people could say that lots of fakes are actually benefit for manufacturers that are...
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    Only if you are planning blacksmith shop or heavy...

    Only if you are planning blacksmith shop or heavy forging.. :D
    Even heavy trucks are enough of problem in some locations like our office building that is apparently built on a clay bed.
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    I was thinking exactly the same. Grains look lot...

    I was thinking exactly the same. Grains look lot larger than what I'd like to see.
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    "it depends" Wera and Taiwan? - The Garage...

    "it depends" Wera and Taiwan? - The Garage Journal Board

    I really don't mind even if they are taiwanese as long as they perform.
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    Wera is just another German brand. Wera Tools...

    Wera is just another German brand. Wera Tools
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