The Depth of Keyseat on a Shaft

Calculate the measurement of keyseat depth from the opposite side of the bore. Although the metric and imperial systems differ, if you know the Keyseat dimensions (H/2 and W), as shown in the picture below, it is possible to calculate the keyseat depth with the bore (S) or vice versa.

• Find Depth (H/2)

• Find Keyseat (S)

Measured Shaft Diameter (D):

Measured Keyseat Width (W):

Measured Keyseat Depth (S):

Key Depth (H/2)

Calculated Key Depth:

Measured Shaft Diameter (D):

Measured Keyseat Width (W):

Given Key Depth (H/2):

Keyseat Depth with Diameter (S)

From Opposite side of the Shaft: