Design Tip - 6

Another easy but useful tip. 

When a rotation axis is made half by half, it is easy to have flashes and small miss-adjustments at the parting line. The small flashes or bad adjustments could create an extra friction to the movement and the part will not rotate smoothly.

In order to minimize this issue the round axis could be slightly cut by both sides to have the parting line on a flat (not round) area. The axis working area will be smaller but smooth and small flashes will not affect to the movement.

The second sketch shows the cut axis. The sketch cut is bigger than necessary, it is only to show the design modification. A flat wall of 0.5 to 1 mm is OK on my applications but as explained on the Design Tip - 5, you can not take the number and apply them to your design. You should understand the concept and apply it to your design.

Remember, never apply formulas on plastic part design. Take the concept and apply it to your design.