another cracked spinner

[hharney]

Don

I have seen a spinner that has been grooved inside from improper fit. With this issue what do you suggest?

[SkyMac]

Both front and rear spinners on mine had deep internal grooves at the location of the nylon spinner support, when we striped them back to commence polishing we found the groove had almost worn through.

Now I have two polished ornaments, I had managed to obtain two rear spinners sets and a front spinner set. Now polished and fitted, I will be interested to read comments on the cause of the grooves, my thought- not enough washers.

I have a spare rear set just in case, an extra rear backing plate as well and front backing plate. Recently I have been offered another another front and rear set, yet to inspect them.

Dave

[hharney]

I would suspect fitting issues cause the internal abnormal wear. There may be some justification to prop balancing also but the higher percentage of damage is most likely the spinner not properly fitted. More washers would be one concern but I thought I read somewhere that the number of washers is limited. This would indicate that the spinner or the internal support is worn beyond specs. I have seen many units with multiple washers, homemade too. One needs to be careful as the internal support will be compromised on the prop hub if too many washers are stacked up. Remember these things are 50+ years old and have been removed at least 50+ times.