Rads may be replaced with undercuts

[hoezap]

Hello

what is the correct meaning of that draw?
is that 0.13 rad can be replaced with 45 degree chamfer?

Thank you in advance

Similar Threads:

• Machining a feature with rads on a circumference
• need help programing 2 rads
• Programming rads without cutter comp
• Machining of undercuts
• Replaced encoder, replaced cable, still can't get 4th axis working

[JohnDonlan]

Hello

what is the correct meaning of that draw?
is that 0.13 rad can be replaced with 45 degree chamfer?

Thank you in advance

Apparently the intent of allowing the design change of a substitute 45° undercut is to ensure that the mating part which either slides on or is screwed onto this part will securely jam up against the shoulder. If the mating part has a sharp corner it may be prevented from properly jamming up against the shoulder by the .130" radius.

The radius design is stronger. The 45° undercut, although providing an expedient solution to clearing out that corner, may possibly weaken the joint.... The sharp angles allowing for the propagation of stress cracks (depending on the operating conditions and forces and stresses).

Probably a better solution would be to allow for a generous chamfer on the corner of the mating part.... So that the .130" radius could remain, but not interfere with that part properly seating against the shoulder.

You see, most likely that radius was formed by the carbide insert on the tooling which cut it (the insert typically having a .125" radius).