Part name: Mobile_balance_holder (photos of part taken on 2nd Apr. 2018)
In material: POM
With 2pcs M3 thread holes
For final part, the dimension 30mm is increased by 0.14mm, otherwise should be within +/-0.05 tolerance, the cause are:
1)Solid tube material need be preheated before machining
2)The wall thickness at this section is relatively thin.
3)Possibly, there is influence from remaining temperature of cutting fluid
If this dimension is not usable, negative tolerance is suggested for dimension control in machinning work
Size(unit:mm tolerance: +/-0.5) :
