BIG thread chaser source

- B
- BillM
  
  Contact options for registered users
posted
14 years ago

Wed, Jun 25, 2008 7:08 PM

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

- I
- Ignoramus27719
  
  Contact options for registered users
posted
14 years ago

Wed, Jun 25, 2008 7:44 PM

Would a wire brush work for you?

- L
- Leo Lichtman
  
  Contact options for registered users
posted
14 years ago

Wed, Jun 25, 2008 8:02 PM

"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.

- S
- spamTHISbrp
  
  Contact options for registered users
posted
14 years ago

Wed, Jun 25, 2008 8:59 PM

Interesting, there's a tool for large external threads

formatting link

But its over $500.
Their internal tool is just the insert on a handle.

formatting link

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

BIG thread chaser source

Further Reading

Metric Thread Chaser

[SOLVED] R134a Thread size? Need to hook it up to 3/4" female NPT vacuum pump

Thread chaser for immersion heater

Is there a way to show NPT threads with a cosmetic thread

HELP! Rust on collets

Rust on base of otherwise nice 12" Starrett 98 Level

Need a Source for Rigging Thread

Thread cutting on a reversible lathe

Imperial thread on metric lathe!

Need Source for BIG, Cheap Sprockets

Following on from 'Rust in Workshop'

Air tool threads

Strength of aluminum threads

Need Someone To Turn Threads

What should I do with my metal scrap?

Pneumatic rack and pinion drive