JonC Posted February 2, 2021 Share Posted February 2, 2021 Ok so I’m not the kind of guy to run roughshod over someone else’s post as you all know so I’m starting my own ‘it a woodruff key’ thread. More important than naming a by piece of metal is the question of the fit. @suzook12mentioned that the fit should be tight, so I’ve looked at mine and am now not sure. My key isn’t square it’s rectangular, the smaller size being nearly a mm smaller than the channel in the prop. The larger dimension is a tight fit, It will sit in it without falling out. I haven’t got the shaft in my house as it’s still on the boat. So should I force it in the tight way or as I’ve been doing the loose way? There is no visible wear on the keyway on the prop. Quote Link to comment Share on other sites More sharing options...
suzook12 Posted February 2, 2021 Share Posted February 2, 2021 (edited) You are measuring the height of the key there, not the width. It shouldn't be tight, but it should be "snug", anything from a firm push to a gentle tap to get it in the slot.... Check the width of the key steel and check the depth of the groove in the prop and in the shaft. Sounds like you may have the wrong key steel in there. The slot in the prop may not be a match to your shaft, in which case you make have to make the best of it, maybe using some bearing fit (it's like a loctite type stuff) Edited February 2, 2021 by suzook12 Quote Link to comment Share on other sites More sharing options...
JonC Posted February 2, 2021 Author Share Posted February 2, 2021 I’ve looked on line and A4 key steels are readily available in 8mm square that will hopefully suit. I’ll need to check the depth of the key way on the shaft tomorrow. Geoff and suzook12 2 Quote Link to comment Share on other sites More sharing options...
JonC Posted February 2, 2021 Author Share Posted February 2, 2021 I’ll have to cut it to size, does it mater if the end is square or do I need to grind it to shape. Quote Link to comment Share on other sites More sharing options...
suzook12 Posted February 2, 2021 Share Posted February 2, 2021 No burrs is the main bit Quote Link to comment Share on other sites More sharing options...
JonC Posted February 3, 2021 Author Share Posted February 3, 2021 My key does fit nice and tight,maybe all the excitement of getting the prop off was just too much for me. suzook12 and Andy135 2 Quote Link to comment Share on other sites More sharing options...
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