32x40 H -- Gas Engine

[BRIAN]

Just had to get the cam wheel crossed out to make the set complete. Later I will file the spokes oval to give a more vintage look.



Now what's next?

Brian

 

[BRIAN]

Hooray Hooray, it arrived today.
The Material I have been waiting for, Now I can get on with crank E T C.
all I need now is shop time.


Brian

 

[BRIAN]

Started turning down the stock to workable blanks.



Then I will clean the lathe so I can see what I am doing.??




Slowly Slowly.


Brian.

 

[Micke S]

Thank you for sharing, I get many good tips from this.

 

[Dranreb]

Don't know how I missed this thread, excellent work and write up Brian, I've learned a lot...:thumbzup:

 

[BRIAN]

OK so now we have the two blanks for the webs of the crank, the next job was to Loctite them together, return to the lathe and skim the surface then drill a hole in the centre.




Now transfer them to the mill and bore the centre to size.



All looks ok.



Now you just may be wondering why I did not do that while I had them in the lathe, well now I just have to move the table 20mm towards me and bore the hole for the crank pin. all done and no marking out.
That's a job for tomorrow.

Brian

 

[BRIAN]

To continue.
Using the DRO I now moved the table rearwards 20mm and changed the boring head for a chuck. and used the centre drill to mark the position of the crank pin.



Then drilled out 1mm smaller than the size required, changed back to the boring head and opened out the hole.



all looks OK so on to the Main shaft tomorrow.



Keep looking, don't forget you are allowed to ask questions???

Brian.

 

[BRIAN]

Now as it is essential to keep all the machining of the main shaft concentric, the job is being done between centres. this allows the work to be removed for measuring or turned end for end without loosing the concentricity.

First end being turned



Turn it over to machine the other end.



The shaft is now .25mm oversize on all dimensions, so after cleaning the lathe, so I can see what I am doing I will bring it to its final size, apart from the location for the fly wheels I have not yet made up my mind as to how I am going to fix them yet.



Brian.

 

[BRIAN]

A little further on, the Journals for the main bearings and fittings for the crank webs are to size.



Slowly Slowly. Brian.

 

[BRIAN]

Well it all fits together, Just the location for the flywheels and screw thread the ends 1/2-20.
then it will have to wait until the bronze bearing is made for the big end so I can balance the assembly prior to final assembly.



Brian.