Group components under one item number

[j.pavlicek]

Hello,

is somehow possible to group components in an assembly to group, so every part in this group has same number? I can't use Demote, because these components aren't constrained to each other but to part in main assembly.

For example. There is shaft with grooves. In these grooves are rings attached. These rings must be in separate BOM, but their position is given by groove position on the shaft. When I use demote, they loose link to the shaft and when groove position is changed rings doesn't copy.

Only workaround what I can imagine is to create assembly with rings on shaft, where shaft is only refference component and then place this assembly to parent assembly (where the shaft is as regular part) and switch off refference shaft visibility. I don't like this solution and hope for something more elegant.

See images:

Shaft changed - rigns copy position groove positions

Original shaft, ring placed separately (each has unique item number)

Rings nested in an assembly (all rings has same item number)

Shaft changed (rings stay in same position as they were nested)

[mcgyvr · Accepted solution]

If all 3 rings are a subassembly or purchased "kit" then you put all 3 into their own subassembly (don't constrain them at all in the subassembly if you don't need too).

In the upper assembly you right click on the ring kit subassembly and select "flexible".. Then you constrain each ring to the shaft as needed..

If the shaft changes the rings update their position correctly..

[j.pavlicek]

Thank you! This is exactly what I was looking for.