Reply With QuoteDelrin works better than the bearing washers I've tried. If used with a delrin tophat it creates a self lubricating join that's as slippy as a slippy thing.
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I have only one needle roller bearing that will fit the piston of a hw97, they seem to be as rare as a very rare thing as no one seems to sell them in the correct size.
Alternatives? Needle rollers really kill the twist on firing, standard greased washers arent even close.
Has anyone found something else that works? PTFE washers etc?
Thanks!
Killer Vampire Lesbians on scooters
Delrin works better than the bearing washers I've tried. If used with a delrin tophat it creates a self lubricating join that's as slippy as a slippy thing.
God rest ye jelly mental men
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2 PTFE/Delrin washers with a polished and lubed stainless shim washer in between works for me, stumbled across that little gem whilst tuning my 95k!
It gives the top hat something to slip against rather than just another PTFE/Delrin washer !.
Last edited by TORNADOS7; 02-12-2014 at 06:34 PM.
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Why put them in the piston ? They work fine at the rear, where the std size (around 28mm) fits easy. Done it to my 77, TXs.
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What size is the one you have that fits?
Zebedee
Whereas what I'm thinking of next trying would be slightly different...two polished steel ones either side of a Delrin one..Originally Posted by TORNADOS7
2 PTFE/Delrin washers with a polished and lubed stainless shim washer in between works for me, stumbled across that little gem whilst tuning my 95k!
It gives the top hat something to slip against rather than just another PTFE/Delrin washer !.
THE BOINGER BASH AT QUIGLEY HOLLOW. MAKING GREAT MEMORIES SINCE 15th JUNE, 2013.
NEXT EVENT :- May 4/5, 2024.........BOING!!
Zebedee
Surely better to help impart spin at the front too, Jon?
Will look into the 28mm for the rear; cheers.
THE BOINGER BASH AT QUIGLEY HOLLOW. MAKING GREAT MEMORIES SINCE 15th JUNE, 2013.
NEXT EVENT :- May 4/5, 2024.........BOING!!
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Thanks very much all! Lots to have a try with.
Jon...I'll see if I can find some 28mm's for the rear (url would be handy), it would mean using a guide which would have to be on the loose side though, surely?
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E6ay - 10 for sod ŁallThanks very much all! Lots to have a try with.
Jon...I'll see if I can find some 28mm's for the rear (url would be handy
Do a search for "needle thrust bearing"
item# 171120921937 is the type I got, a ten-pack which is really good value, prefect for rear guide
also item #161101602948 looks like it might be small enough to fit in a piston @ 21mm ? however 8mm bore too tight for a TX / HW IIRC...
Last edited by Shed tuner; 02-12-2014 at 10:43 PM.
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Found them, just searched for "1528 bearings"
Bought one from the UK so I can play with asap, and ten from hong kong real cheap for other rifles. Thanks very much!
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Ah crap, I may have ordered ones too small....
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You can still use them on piston rod-less guns, e.g. BSAs, Gammos, etc.
If you searched for 1528 and got 15x28x2mm then you are fine though... (for 28-30mm cylinders, to fit rear guide)
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Yep, thats what I ordered. Looking forward to having a play.
***Previous reply deleted to preserve clarity of information***
Banned
I just caved in and ordered some also...however, been thinking today, I think the ultimate setup would be rotating piston and rotating comp tube on an under lever rifle...not sure if it could be done however. I have an idea how it could be done BUT it would take some surgery unless the gun was designed that way...food for thought.
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I fitted a "Tinbum" kit and the stainless steel washer was already in the piston from factory so I just put the PTFE/Delrin washer that was supplied in the kit into the piston up against the piston liner and then slipped the moderately greased washer in between it and the top hat, bobs ur uncle an instant bearing !...
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