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Thread: M12 1.5 Thread chaser

  1. #1
    One of those purists you keep hearing about. sdg3205's Avatar
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    M12 1.5 Thread chaser

    Anyone have a good recommendation for an M12 x 1.5 thread chaser? I'm having a lot of trouble finding one locally, and I've called all the local fastener and tool stores. Lots of taps, but no chasers.

    I need to clean out my head bolt block threads.
    Dave

    Here, somewhere.


  2. #2
    President, DeLorean Industries
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    You need a tap not a chaser. Threads need to be cut further into block. Other wise head bolts will bind and provide false torque readings.

  3. #3
    Senior Member Bitsyncmaster's Avatar
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    I just grind most of the taper end off a tap and use that to chase the threads. That lets me also tap the holes better at the bottom if it's not a through hole.
    Dave M vin 03572
    http://dm-eng.weebly.com/

  4. #4
    LS1 DMC Nicholas R's Avatar
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    Quote Originally Posted by Bitsyncmaster View Post
    I just grind most of the taper end off a tap and use that to chase the threads. That lets me also tap the holes better at the bottom if it's not a through hole.
    Or you could just buy a bottoming tap.

  5. #5
    Senior Member Bitsyncmaster's Avatar
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    Quote Originally Posted by Nicholas R View Post
    Or you could just buy a bottoming tap.
    Have not seen them locally. I actually don't buy the store brand taps except for chasing. The big name taps work so much better when tapping new threads.
    Dave M vin 03572
    http://dm-eng.weebly.com/

  6. #6
    Builder of the first Delorean Time Machine
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    Quote Originally Posted by Delorean Industries View Post
    You need a tap not a chaser. Threads need to be cut further into block. Other wise head bolts will bind and provide false torque readings.
    Any particular brand or model of tap you'd recommend?

    (I don't have a set....)

  7. #7
    Builder of the first Delorean Time Machine
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    Would something like this be sufficient?

    https://www.amazon.com/Uxcell-Flute-...ds=m12-1.5+tap

  8. #8
    Senior Member Bitsyncmaster's Avatar
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    Quote Originally Posted by nullset View Post
    Any particular brand or model of tap you'd recommend?

    (I don't have a set....)
    Look on a machinist tool supply company. A good set will set you back big $$. Your probably better just buying a bunch of the common sizes you need.
    Dave M vin 03572
    http://dm-eng.weebly.com/

  9. #9
    Delorean Guru
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    If you go to a large auto supply they should have it but you may have to buy a whole kit to get just the one size. Or they could order it for you.
    David Teitelbaum

  10. #10
    One of those purists you keep hearing about. sdg3205's Avatar
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    I found something locally
    Dave

    Here, somewhere.


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