Crankshaft Weights & Calculations
This information will help with any balancing problems and calculations. First, you need to know that:
Density (weight) of HM1000 Tungsten = 17 grams/cc
Density (weight) of steel = 7.83 grams/cc
To determine the weight of HD Tungsten or steel:
Weight (grams) HD Tungsten = Dia² x 12.87 x Length x 17
Weight (grams) steel = Dia² x 12.87 x Length x 7.83
For every gram of steel removed and then replaced with HD Tungsten, you have replaced that gram with 2.17 grams of HD Tungsten. You have therefore increased the weight 117%.
Example:
If you drill out 90 grams of steel and replace it with HD Tungsten, you’ve replaced 90 grams with 195.3 grams. The net additional weight will be 105.3 grams.
195.3 – 90 = 105.3 grams
An easy way to calculate the net additional weight added when using HD Tungsten is to multiply the grams of steel removed by 1.17.
90 x 1.17 = 105.3 grams added weight.
The weights listed on our price sheet and the figures shown above are rounded off, or calculated, weights, and can vary with the density of HD Tungsten and steel, as well as dimensional tolerances.
The HD Tungsten weights will be higher because of additional material normally added to length.
We suggest you overbalance slightly and remove material to get final balance. See the balance sheet for detailed information. Follow this link for Crankshaft Stock Sizes.