Diameter stock – The amount of stock on the outside diameter (OD) of rod, is based on the OAL (overall length) of the blank. Grind stock will be added to the finished diameter of a blank as shown in the following chart:
| Blank OAL | Min. OD stock | Max. OD stock |
| 3.000” or shorter | +.016” | +.024” |
| 3.001” – 11.999” | +.020” | +.028” |
| 12.000” or longer | +.024” | +.032” |
Length stock – Because slight variations in shrinkage are amplified with the overall length of a part, grind stock allowed increases with the OAL of a part. Grind stock will be added to the finished length of a blank as shown in the following chart:
| Blank OAL | Min. OD stock | Max. OD stock |
| Length up to 2.000” | +.010” | +.030” |
| 2.001” – 3.000” | +.010” | +.040” |
| 3.001” – 4.000” | +.010” | +.050” |
| 4.001” – 5.000” | +.010” | +.060” |
| 5.001” – 6.000” | +.010” | +.070” |
| 6.001” – 8.000” | +.010” | +.080” |
| 8.001” – 10.000” | +.010” | +.090” |
| 10.001” – 11.999” | +.010” | +.100” |
| 12.000” – 14.000” | +.010” | +.400” |
Warpage allowance – All rod is checked 100% for warpage. Rod warpage is measured on a flat plate with a feeler gauge. Maximum warpage allowed is based on the OAL/OD grind stock as shown in the following chart:
| Blank OAL | Max. warpage |
| 3.000” or shorter | .005” |
| 3.001” – 11.999” | .006” |
| 12.000” or longer | .008” |
Note: Allowable warpage may be adjusted based on the actual rough blank diameter. To do so: first subtract the finish diameter from the actual rough blank diameter to determine the amount of grind stock. Divide the actual grind stock by 3 and round this figure down to 3 decimal places. Please remember that .008 is the maximum allowable warpage regardless of the amount of grind stock.