Crowded needle roller little end

I am trying to fit A Suzuki piston to a D1. bludgeon (spell checker! ) pin. I believe the term for making this work is "crowded roller".

Can anyone talk me through (or have pictures) of how to do this?

Advice much appreciated.

Thanks,

Andy

Hi Andy
need to know the size of the small end eye one on the conrod (what rod
and what the size the piston pin is try and find a small end cage if possible
Robbie

Robbie,

Thanks for the reply. I got this information from the Bantam Racing web page "Building  a175 Racer".

Talking about little end prep it says;
"What we do is fit a crowded roller, about 19 @ 3mm x 18.9mm rollers with sprung steel thrust washers to hold them in, these are a close fit on the pin and are home made."

I am thinking that matching the D1 little end to the Suzuki pin will need something like this, as I haven't seen or heard of anyone who has found a small end cage to do this.

But then, what do I know!

Cheers,

Andy

here's mine, two bearing parts from a needle roller plus all the pins

So do the piston pin cir clips hold it all together?

Thanks,
Andy

The pin has its clip in the piston as normal, the two washers are just a few thou bigger than the pin there function is the let the crowded rollers rub loosely on them rather than the inner part of the soft alloy piston. You'll have to select a piston that's big enough to fit all this in, tz or wisco ts185 etc

Thanks!

Andy

The tighter the fit between the washers and pin the better. Even .05mm will make them rattle and wear through the pin. I use hardened and tempered spring sheet and ream slide fit holes then put them on a mandrel and turn OD. You also do not want them crowded tight, if you can, get them tight then remove one. Most sizes you can’t get them tight so just a space of almost one roller is fine.

Hi all there will be soon a small to replace the crowded rollers which will be great news for all the lads running the 175cc motors as soon as I get hold of one I will be testing it  

These ?   
http://www.ebay.co.uk/itm/K14x19x17-Needle-Roller-Cage-Assembly-14x19x17mm-/141133719286?pt=UK_BOI_Industrial_Supply_Material_Handling_ET&hash=item20dc39a6f6#ht_2287wt_1073

I think this is the one for the KTM rod:

http://www.ebay.co.uk/itm/K16x22x16-Needle-Roller-Cage-Assembly-16x22x16mm-/131064325506?pt=UK_BOI_Industrial_Supply_Material_Handling_ET&hash=item1e840ae582

For my short stroke motor with TZ250 Yamaha rod and Suzuki RM125 piston I also use an orphan 14 x 20 x 16

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Robbie, what brand are those ?

Hi John these's have been made to order for Rex Caunt

Hi all was running theses cages at the last meeting and look good will be running theses all season in both the bikes

Still running these caged rollers have done over 700 racing miles and still going I will be using them from now on. on all my 175 Engines

me too, fitted one to my engine last night, i didn't miss the agro of the crowded rollers! , swear box will be a little light at Christmas though