I'm going to need a prop flange adaptor for a blade engine. I've been advised that a spacer/washer should be used in conjunction with it and the retaining bolt in order to allow the adaptor a few 'thou of end float on its shaft.
This apparently prevents the adaptor bolt working loose.
Have others used this method and does this spacer/washer come with the adaptor and, if so, which manufacturers supply the two?
(There's one on ebay at mo' but it doesn't come with a spacer - I asked him.)

Thanks,
Andy.

Andy,

I had some made up for me in a couple of different thicknesses by a local machine shop. You will need one unless the sprocket adapter is the exact width of the sprocket spindle which is very unlikely as they vary alot.

Rich.

I turned up my sprocket adaptor on the lathe & am pretty pleased with the result:
http://www.locostbuilders.co.uk/photos.php?action=showphoto&photo=propadapt.jpg
It clamps the original sprocket using the bolts in the "divots' to give positive location so the original sprocket is retained but does not need to be machined in any way (handy 'cos it's hard as rock). Only the teeth of the sprocket are clamped, the rest seems to have a plastic overcoat.
cheers
Bob

IMHO it shouldnt have any end float on the flange, you want it bolted tight to the output shaft. The spacer is usually supplied to make sure this happens as the retaining blt has been known to break if the flange can slide against it.

What size threaded holes do the flanges of prop adaptors tend to have?
(there are ones listed regularly on ebay which have M8 threaded holes. Are these big enough to cope? - He can also supply 10.9 high tensile bolts to go with them.)

Regards,

Andy.

Yep, most prop flange bolts are M8 or a similar imperial size, usually fine thread though I think

Id go for high tensile ones just for belt n braces but regular 8.8 would probably be fine, I ended up used cap head (allen key) high tensile bolts with a liberal coating of loctite