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Runout and Tooth Bearing Pattern Check (Curvic
Coupling Nomenclatures and Seal Cavity Dimensions)
Figure 321
Inspection
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DIMENSIONAL LIMITS FOR Figure 321
NOTE: 1. The seal cavity parallelism applies to Datum C.
On single curvic parts, Datum C refers to the face located by the stack dimension to the curvic coupling pitch plane.
On double curvic parts, Datum C refers to the curvic coupling pitch plane at the opposite end of the part.
Inspection
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Runout and Tooth Bearing Pattern Check (Gable Angle Dimensions and Master Control Coupling Set-up Inspection Specifications)
Figure 322
Inspection
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20-00-02/70-00-01
DIMENSIONAL LIMITS FOR Figure 322
NOTE: 1. Datum plane A is the surface of the rotating table which master coupling 1 is installed.
2.
Datum axis B is the axis of rotation of the table.
3.
-A- (Primary Datum Feature A) is the register face on master control coupling 1.
4.
-B- (Secondary Datum Feature B) is the curvic coupling on master control coupling
1.
5.
Master control coupling 2 is used to align the axis of the secondary datum feature B with datum axis B. The alignment is correct when master control coupling 2 is rotated to four approximately equally spaced locations and the radial runout of its register diameter is constant at all four locations.
Inspection
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Runout and Tooth Bearing Pattern Check
(Inspection Specifications for Single Curvic Couplings)
Figure 323
DIMENSIONAL LIMITS FOR Figure 323
NOTE: 1. Applies to face and radial runout as specified on the drawing decal table or general note.
2.
Make a mark on the curvic coupling tooth face to identify the high point.
3.
Find the location of face(s) dimensioned to the curvic coupling by subtracting the master control coupling stacking distance from the inspected height.
4.
Examine the face runout and radial runout with the part rotated to four approximately equally spaced locations.
Inspection
Page 346
Apr 1/05
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Runout and Tooth Bearing Pattern Check (Inspection
Specifications for Parts with Two Curvic Couplings)
Figure 324
Inspection
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DIMENSIONAL LIMITS FOR Figure 324
NOTE: 1. Make a mark on the curvic coupling tooth face to identify the high point.
2.
Find the part stack dimension between coupling pitch planes by subtracting the sum of the two master control coupling stacking distances from the inspected height.
3.
Relationship of first curvic coupling to in-process datums. These are not drawing specifications.
4.
Find the location of faces dimensioned to lower curvic coupling by subtracting the lower master control coupling's stacking distance from the inspected height.
5.
Find the coupling to coupling face runout.
6.
Find the coupling to coupling radial runout.
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