Chamber flush system build log.

[Taylorbok]

Was your reamer modified for through barrel coolant?

do they just modify the pilot to allow coolant past or does the entire reamer have grooves?

 

[LVLAaron]

do they just modify the pilot to allow coolant past or does the entire reamer have grooves?

All reamers are grooved

 

[Taylorbok]

All reamers are grooved

LOL, That was basically my question/ point. Doesn't the reamer function just fine the way it is with through coolant, I can see needing a grooved pilot.

 

[Walt Krafft]

The simplest modification extends the flute grooves out to the end of the reamer and either moves the snap ring groove, shortens the bushing, or grooves the retainer screw if used. Others use grooved bushings. The object is to allow the coolant past the pilot rather than have the pilot act as a plug. Not enough coolant will pass past a solid pilot just in the rifling grooves.

 

[Walt Krafft]

Here are several reamers set up for coolant.

 

[LVLAaron]

Not to go too far off topic... careful with the pilots... I had a JGS reamer that was always coming up short on freebore... The grooves in the pilot lined up perfect with the pilot, making the pilot irrelevant to the operation.