Crankshaft Re-Grinding Details for Norton 500 Twins
Download the complete PDF version using the green download button at the top right of this page for a factory-style crankshaft re-grinding reference for Norton 500 twin engines. This technical drawing gives the crankpin diameters and face radius requirements for first, second and third undersize re-grinds.
The sheet specifies the correct crankpin dimensions for each machining stage and clearly shows where the crankshaft should be stamped after grinding. It also repeats the important requirement to maintain the specified .095"–.090" face radius at each re-grind size.
Contents Include
- Crankshaft re-grinding data for Norton 500 twins
- First re-grind crankpin size: 1.4905"–1.4900"
- Second re-grind crankpin size: 1.4805"–1.4800"
- Third re-grind crankpin size: 1.4705"–1.4700"
- Required .095"–.090" face radius
- Crankshaft stamping locations for .010, .020 and .030 undersizes
- Clear machining diagrams for each re-grind stage
