Head swap questions...
03-08-2007, 09:39 PM
#21
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Originally Posted by Studytime
I don't understand how it can really be that much different than a conventional tap.
A regular tap doesn't remove a significant amount of metal, it just cleans (chases) the threads. How can this be different?
Are there any tap-die experts out there that can educate us on this?
Ben T.
A regular tap doesn't remove a significant amount of metal, it just cleans (chases) the threads. How can this be different?
Are there any tap-die experts out there that can educate us on this?
Ben T.
03-08-2007, 10:05 PM
#23
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A tap is used for cutting new threads in a drilled hole.
A chaser is used for cleaning/deburring existing threads.
You can use a tap to chase existing threads, but this practice will dull and ruin the tap over time. If you happen to have a tap that size, you can certainly use it, if not, a chaser is usually cheaper to buy than a tap is.
The other advantage to a chaser in this application, is the threads are full right to the bottom. Even a bottoming tap still has a couple tapered starter threads, and won't really clean the bottom couple threads in a blind hole (like the block is).
A chaser is used for cleaning/deburring existing threads.
You can use a tap to chase existing threads, but this practice will dull and ruin the tap over time. If you happen to have a tap that size, you can certainly use it, if not, a chaser is usually cheaper to buy than a tap is.
The other advantage to a chaser in this application, is the threads are full right to the bottom. Even a bottoming tap still has a couple tapered starter threads, and won't really clean the bottom couple threads in a blind hole (like the block is).
03-08-2007, 10:18 PM
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Originally Posted by Thimble
The other advantage to a chaser in this application, is the threads are full right to the bottom. Even a bottoming tap still has a couple tapered starter threads, and won't really clean the bottom couple threads in a blind hole (like the block is).
Ben T.
