Precision sharpening and lapping system for valve seat inserts

A machining system for sharpening and lapping a valve seat insert, said machining system comprising:

• a housing having a first grit wheel and a second grit wheel;
• a rod extending from said housing, wherein said rod positions below said first grit wheel and said second grit wheel;
• and
• an insert holder comprising an insert, wherein said insert holder comprises a plurality of grooves positioned one above another for receiving said rod at various positions,
• wherein a first groove of said plurality of grooves receives said rod such that said insert positions against said first grit wheel in operation to sharpen the entire face of said insert, and
• wherein a second groove of said plurality of grooves receives said rod such that said insert positions against said second grit wheel in operation to lap said insert.

A method of sharpening and lapping a valve seat insert, said method comprising the steps of:

• providing a housing having a first grit wheel and a second grit wheel;
• providing a rod extending from said housing, said rod positioning below said first grit wheel and said second grit wheel;
• providing an insert holder removably connecting to said rod at various positions, said insert holder comprising an insert;
• positioning said insert holder on said rod for aligning said insert against said first grit wheel in operation to sharpen the entire face of said insert using said first grit wheel;
• and
• repositioning said insert holder on said rod for aligning said insert against said second grit wheel to lap said insert.