mowersman
Member
- Messages
- 252
- Location
- Somerset, UK
Please don't shoot me down in flames here, as I'm going to do it anyway.
I'm currently trying to join two single cylinder, horizontal crankshaft lawnmower engines to make a 360 degree twin. I've got the joining of the two blocks sorted, however I'm still a little worried about joining the cranks together.
My current thoughts are to bore a 10mm hole, about 20mm deep into each crank and to press fit a piece of 10mm silver steel rod to hold the two in alignment, and then the weld round the journal, before turning and grinding back to size.
I think this should work ok, although I realise that this will put the crank out of true and that I would then need to straighten it, which I am sure I can do, using a DTI and a little brute force. The centre of the cranks can be held by a centre main bearing if necessary, however, if possible not, as it would make my life much easier.
This engine obviously won't have a hard life, as it is really being done to prove that it can be done.
Any thoughts on the above issue.
Thanks
Andrew
I'm currently trying to join two single cylinder, horizontal crankshaft lawnmower engines to make a 360 degree twin. I've got the joining of the two blocks sorted, however I'm still a little worried about joining the cranks together.
My current thoughts are to bore a 10mm hole, about 20mm deep into each crank and to press fit a piece of 10mm silver steel rod to hold the two in alignment, and then the weld round the journal, before turning and grinding back to size.
I think this should work ok, although I realise that this will put the crank out of true and that I would then need to straighten it, which I am sure I can do, using a DTI and a little brute force. The centre of the cranks can be held by a centre main bearing if necessary, however, if possible not, as it would make my life much easier.
This engine obviously won't have a hard life, as it is really being done to prove that it can be done.
Any thoughts on the above issue.
Thanks
Andrew