VALVE SEAT GRINDING

Grinding valve seats on a new Japanese cylinder head to improve concentricity of guides and seats.
From factory we find up to 0.07mm ereurs!

Category:

Science & Technology

Tags:

• valve
• cylinder head
• grinding cylinder head
• jig grinding
• valve seats racing

[cosast54]

houser Jig grinder.

[scotts439]

is that a jig grinder on a vertical mill?

[cosast54]

@scotts439 Houser Jig grinder..

[cosast54]

@cosast54 Just like to add, circularity is less than 2µ !

[cosast54]

@DrMMHMD Please Explain.

[cosast54]

@DrMMHMD Thank you for your comments, In my experience new cylinderheds from the factory do not meet our standards for concentricity beetwen guides and valve seats; Typicalywe achieve les than 0.005 mm TIR where as new from factory we have found up to 0.12 TIR 8

Also as we are using coated titanium valves8 So lapping is not possible.

[cosast54]

@kevykev38 Hi

the precision obtained is extraordinary, no lapping required, also it is air tight and concentric with the guides.

to grind 5 seats ,3 angles for each seat total 1.5 hours

[kevykev38]

yeah nice work but seams like, time for set up and truing the cylinder head to the machine would take too long for just a little valve seat, its kinda over kill ya think?

[peponakos]

mastora eisai megalos

[cosast54]

good job !