Driven Studs

Points to be borne in mind are:

1. Hole draft angle

Use the minimum to produce uniform interference, usually 0 – 0.25 degrees is acceptable

2. Chamfers

Both shaft and hole should be chamfered to prevent pick up during driving

3. Depth of driving

At least equal to the diameter. Do not allow the shaft to hit the bottom of the hole unless well supported

4. Interference

Trial and error may be needed as pull out load depends on surrounding casting shape as well as the shaft fit. A typical interference would be 0.1 mm

Reference 23