One relationship between the centre and outer mounting pattern
A central hub, radial members and outer mounting features form an open ring structure. The key is their relationship: the centre interface and outer pattern need to remain connected as material is removed from the radial sections.
Centre-to-perimeter relationship
End-face geometry after release
Radial edges and finished interfaces
02 · MACHINING CHALLENGES
Where geometry shapes the machining approach
01
Radial support stability
CHALLENGE
Opening the spaces between arms reduces stiffness during machining.
PROCESS CONTROL
Retain support during roughing and evaluate the release sequence before finishing the central reference.
02
Central-to-outer relationship
CHALLENGE
Checking bore size alone does not establish its position relative to the mounting pattern.
PROCESS CONTROL
Tie the hub and outer features to a common datum plan and inspect the relationship as a system.
03 · MANUFACTURING APPROACH
From locating datums to finished interfaces
01
Define the centre and face datums
Locate the hub, end face and outer mounting pattern within one datum system.
02
Retain support through the radial features
Plan the removal of stock around the open sections so the remaining ribs are supported during finishing.
03
Finish the linked interfaces
Finish the centre and outer features, treat accessible edges and check the final mating condition required by the drawing.
04 · INSPECTION FOCUS
Check the features that govern assembly
01
Centre-to-perimeter relationship
Inspection method
Check the centre bore and outer mounting pattern together using the drawing datum system.
Functional purpose
Align the centre interface with the outer mounting pattern.
02
End-face geometry after release
Inspection method
Measure specified face geometry under agreed support without forcing the ring flat.
Functional purpose
Verify face geometry without forcing the ring flat.
03
Radial edges and finished interfaces
Inspection method
Inspect accessible openings and check protected mating features in their specified final condition.
