BIG thread chaser source

Need a tool to chase the rust out of threads on irrigation riser sockets.

Thread is 4" NPT internal. Yes---that's FOUR INCH.

Any ideas? I've never personally seen a pipe tap that big, and I'm sure the price would scare me. Might just have to offset the tailstock and make one. I think I've got a chunk of 5" 8620 around here somewhere.

Does anybody have a source for a 4" internal thread chaser?

Bill

Reply to
BillM
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Would a wire brush work for you?

Reply to
Ignoramus27719

"Ignoramus27719" wrote: Would a wire brush work for you? ^^^^^^^^^^^^^^^^^^ How about making a few hacksaw cuts across the threads of a nipple, so it acts sort of like a tap? If that works, but wears too fast, then case harden it.

Reply to
Leo Lichtman

Interesting, there's a tool for large external threads

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But its over $500.

Their internal tool is just the insert on a handle.

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Inserts are about $15, maybe some creative thought will yield an interesting solution.

Dave

Reply to
spamTHISbrp

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