Technical Details Valve Guides
1001 = Grey Iron with excellent resistance to wear and suitable for normal stress levels.
1002 = With addition of extra phosphorus for poor lubricated engines due to anti-friction properties.
1003 = Grey Iron with phosphorus & chromium go give extra wear resistance, while the chrome helps it to be used at higher temperatures. Used in heavy duty applications which have high stress.
P: Phosphate
G: Grinded
PG: Phosphate and Grinded
PI: Plain (Smooth) Inner Dia
SR: Spiral Reamed Inner Dia
SRR: Special Spiral Reamed Inner Dia
H: Heat treated 30 – 55 HRC