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Thread: Thread cleaners/taps

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    Thread cleaners/taps

    Has anyone had a good experience of a kit which will work for twin cams please

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    Re: Thread cleaners/taps

    Anything in HSS not carbon steel i buy off ebay individual taps as required. HD use a few sizes

    I avoid complete kits as a lot are chinese HSS (Hongkong Shit Steel)
    Last edited by Gizmo; 28-01-2019 at 06:17 PM.

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    Re: Thread cleaners/taps

    Quote Originally Posted by Gizmo View Post
    Anything in HSS not carbon steel i buy off ebay individual taps as required. HD use a few sizes

    I avoid complete kits as a lot are chinese HSS (Hongkong Shit Steel)
    but if its just cleaning threads HSS is OK

    john
    (old iron ass)

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    Re: Thread cleaners/taps

    I think 1/4, 5/16 and 3/8 UNC actualy covers 90% of threads on a Harley of just about any age.

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    Re: Thread cleaners/taps

    Taps would buy quality one at a time as needed, pricey and as they spend most of their lives in a box best not to splash out on a complete set.

    Thread cleaners buy a whole set, Chinese is fine but there is a made in USA company called Laing that sells on Amazon USA for good prices and they deliver to Europe, I have these and their thread files. Really good quality gear and they do a combined pack with the files. My set and files do metric as well and non metric. Some of the Harley fastenings (especially around the forks) are metric so is really useful.

    apparently using a tap to clean a thread risks making it loose. The proper tool is a pleasure to use, both on blind holes and bolts to remove Thread Locking materiel. You know you are going to get the right torque on reassembly.

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    Re: Thread cleaners/taps

    Quote Originally Posted by David Barnby View Post
    apparently using a tap to clean a thread risks making it loose
    Yep - beat me to it. Taps are not for cleaning out threads, use a thread chaser for that ...

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    Re: Thread cleaners/taps

    If you get a set of three taps then the plug tap is fine for cleaning threads. A first (taper) tap may tend to bellmouth the thread if used incorrectly but a plug tap will follow the thread down. Thats what its for. Its a finishing tap.

    I use plug taps for cleaning powder coat out of threads on aluminium parts.
    Last edited by Gizmo; 29-01-2019 at 08:23 AM. Reason: additional info

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    Re: Thread cleaners/taps

    Quote Originally Posted by Gizmo View Post
    a plug tap will follow the thread down. Thats what its for. Its a finishing tap
    That's exactly where the risk lies - it's a tap and a tap is designed to cut threads. If you have a look at a tap that's been through an existing thread you'll see that most of the time there is material on the tap when it's removed. The tap is slightly enlarging the existing thread form instead of just removing debris. It's a common practice but it's not right.

    Chaser above, tap below. Much less chance of enlargement with the chaser.

    Click image for larger version. 

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    Re: Thread cleaners/taps

    The problem I find with thread chasers is that they are often too blunt. Ok if you are removing thread locking compound or muck. But if there is thread damage or there is other material in there such as corrosion they sometimes just bind up. If its a mild thread dressing then use a thread chaser.

    A plug tap may remove metal where the thread has been damaged but if its having to cut anything out then a chaser may not be man enough.

    If you are hamfisted though a tap is not for you.

    If you just want to debris out of the threads you can make a tool by grinding a couple of slots down an old bolt.
    Last edited by Gizmo; 29-01-2019 at 10:17 AM.

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    Re: Thread cleaners/taps

    Thanks for the replies i only want to clean out old loctite so will try and source the three thread chasers suggested

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