Tuning RAW HM1000xLRT Pellet Proble

[SpiralGroove]

Boy you Guys have been great!

The inner pellet probe was bent at its base not the tip, causing it to become stuck in the outer probe.

When I bent it straight again, I needed to sand the inner probe with 1200 grit paper to smooth out the remaining bent location. The inner probe had no belleville washer, I was thinking the blow back was caused because I sanded too much material off the inner probe allowing air to go through the probe. I will add a belleville washer to the base and see what happens, but will likely just use the new probe when it arrives. The old one works, but isn't perfectly straight.

The TP only goes from the valve to the barrel (maybe 1/4"), so I didn't touch the inner bore except to widen (oval) its base hole. Will fiddle with the entire assembly until blow back is gone.

Kirk

 

[nomojo65]

Edit

 

[SpiralGroove]

Hey Bb,

Tried a Belleville washer in between the two pellet probes (spring bottom), but the washer's ID & OD are just too big to fit the system. My washers are left over from Ninja bottles and are likely not the ones you were referring to. Anyway, as a quick fix, put in a medium thickness o-ring which work roughly the same, except will not last.

The report from the gun is super quiet, I think I just got used to it being loud. The target strike is louder than the gun @ 933 fps with 18.13 grain JSB. I will likely look for a smaller BW (similar to whats on the RAW regulator) because this is a more permanent fix. Even with a new probe I will likely use a BW as the action has a more solid lock-up with additional pressure behind the probe. 

 

[bucketboy]

Hey Bb,

Tried a Belleville washer in between the two pellet probes (spring bottom), but the washer's ID & OD are just too big to fit the system. My washers are left over from Ninja bottles and are likely not the ones you were referring to. Anyway, as a quick fix, put in a medium thickness o-ring which work roughly the same, except will not last.

The report from the gun is super quiet, I think I just got used to it being loud. The target strike is louder than the gun @ 933 fps with 18.13 grain JSB. I will likely look for a smaller BW (similar to whats on the RAW regulator) because this is a more permanent fix. Even with a new probe I will likely use a BW as the action has a more solid lock-up with additional pressure behind the probe.

Yes I have used o rings in the past. The washer you need has a OD of 12.39mm ID 5.25mm and a thickness of 0.5mm.



Bb

 

[SpiralGroove]

Thanks Bb️

Kirk

 

[SpiralGroove]

Hey Bb,

Ordered the washers you described from McMaster-Carr ...

One question:

The Belleville washers or o-rings (between the pellet probes) create back pressure on the loading system which makes a tight/solid lock-up, however, have you noticed any long-term, excessive wear to the system?

 

[bucketboy]

No wear noticeable, the washer and/or o ring allow an amount of “give” making the locking down of the bolt/side lever feel smother.

I have had an o ring behind the probe inside the bolt of my MK1 rapid for at least 10years, it still functions perfectly. 



This is the prototype probe I currently have in my RAW, the outer probe has a recess to accommodate an o ring, when the bolt is closed the o ring is under compression making a perfect seal between inner and outer probe, 

Bb

 

[SpiralGroove]

Hey Bb,

As always... Thanks

 

[SMH77]

HOLEYCOW!!! 

Heres just few of mine...well some are Theoben Rapids and Ben Tailor BT500 same difference...

Many more at the other house take pics a lot later...

Top to bottom 25 25 22 177 22...

Can you send me photos of that last stock-both sides, etc? I love that one and wish I could find one of those. Which model is that one (brown stock, at the bottom)?



Sean