Cylinder Head Machining
Cylinder Head Machining
(OP)
I have been searching for tooling setup to skim cylinder heads on a mill. I have been told that you turn the head of the mill 1/2 deg to prevent backcut on the surface & use a large radius cutter with only a single cutting tool. But this would leave the decking surface slightly curved. Is this the correct method?
Does anyone have any pointers
The application is on small aluminium in line 4cyl motorcycle heads.
Thanks,
Michael
Does anyone have any pointers
The application is on small aluminium in line 4cyl motorcycle heads.
Thanks,
Michael





RE: Cylinder Head Machining
As for the tool, a single cutter would work exactly as a multiple cutting head, it just requires a far slower feed.
Make sure, be very sure, of what the OEM is asking for in terms of surface finish, and follow it exactly.
RE: Cylinder Head Machining
RE: Cylinder Head Machining
Thanks,
MB
RE: Cylinder Head Machining
Half a degree tilt is too much, you only need tool clearance. And I agree that the resulting curvature is so small as to be insignificant. Finish is much more important.
RE: Cylinder Head Machining
Larry
Larry Coyle
Cylinder Head Engineering, LLC
www.cylinderheadengineering.com
RE: Cylinder Head Machining
I would be more worried about how accurate your mill will cut over the length of the head. "Knee" type milling machines (Bridgeport etc) tend to produce a "crowned" cut as they age. The weight of the table causes this.
Also with milling alum, if surface finish is critical, blow the chips away as you cut, otherwise as the head moves along the cutter picks up chips on the back cut and rubs them across the milled portion, giving ghosting.
A nice tip I saw on another site suggested using an old flywheel as the cutter body. And carbide does work very well, but cbn can work better.
John.
RE: Cylinder Head Machining
Thanks,
MB
RE: Cylinder Head Machining
A tidy mind not intelligent as it ignors the random opportunities of total chaos. Thats my excuse anyway
Malbeare