MetalworkingFun Forum

its shaping up nice

Hi Tom.

The crank will be built up on a one piece shaft and the center cut out when its all in line, the drawing shows the center between the webs still in place. I will probably put in the keyway's for the flywheels and screwcut the retaining threads before removing this section,
A lot of thinking to do before cutting metal. meanwhile I am moving on with the connecting rod.

Brian.

I'm watching this thread with interest Brian. Thank you for sharing.

[attachment=9423]
The connecting rod blank was set up in the mill and the holes for the cap bolts drilled,
The cap end was then cut off.

[attachment=9424]

The cap blank was made the correct size and the rod blank trimmed.

[attachment=9425]

The cap blank was reunited with the rod blank and using a series on slotting drills the bore was opened to 16mm
BUT on measuring it was 15.5 ***?- chinky cheap tools.

[attachment=9426]

Luckily I had not moved the X Y so i fitted the boring head to finish the job.

 [attachment=9427] 

Now waiting for the next stage.

[attachment=9428]

Onward and upward  Brian.

After drilling the small end the rotary table was fitted along with a pin to fit the small end  and the OD milled to shape.

[attachment=9447]

The sides milled to shape.

[attachment=9448]

[attachment=9449]

Just needs a clean up.

[attachment=9450]


Onward and upward. Brian

Brian,

What type of steel is that you're machining?

Ed

Looks like type 6061 to me.

(10-24-2014, 09:38 AM)TomG Wrote: [ -> ]Looks like type 6061 to me.

That's my guess too Tom.

Ed

Nice work Brian  
 
DaveH

Hi all
the alloy is 5083 I hope it will be strong enough it will have a bronze big end bearing with a positive oil feed through the crank pin.
Getting material is a big problem for me local suppliers' only have Black steel that is awful to turn but lots of stainless because of the marine -- olive oil and wine industry

Brian