MIL-DTL-6193D
3.5.5 Static torque load. Specimens shall be subjected to torque load conditions specified in 4.7.5.
3.5.6 Torsional play. The torsional play shall not exceed the applicable limit specified in table II
when tested as specified in 4.7.6.
3.5.7 Endurance test. The universal joint shall be endurance tested as specified in 4.7.7. Failure of
the universal joint is indicated by:
a. 5° or more torsional play.
b. When lubrication retaining covers are in place:
(1) Failure of the lubricant retaining cover.
(2) Lubricant shall be retained by the lubrication retaining covers throughout the endurance
run.
3.5.8 Lubrication retention (class 2). The lubricant retention cover shall retain the lubricant and not
crack or show signs of failure when tested as specified in 4.7.8. Slight bleeding of lubricant on surface of
cover is permissible.
3.6 Identification of product. Each joint shall be permanently and legibly marked in accordance with
provisions of MIL-STD-130. The minimum marking requirements shall be the PIN and manufacturer's
CAGE.
3.6.1 Use of AN or MIL designations. AN or MIL designations shall not be applied to a product,
except for qualification test samples, nor referred to in correspondence or sales matter, until notification
has been received from the qualifying service that the product has been approved for military use.
3.7 Workmanship. All details of manufacture shall be in accordance with the best practices for high
quality military parts.
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are classified as
follows:
a. Qualification inspection (see 4.3).
b. Conformance inspection (see 4.4)
4.2 Inspection conditions. Unless otherwise specified herein, all inspections shall be performed in
accordance with the test conditions specified herein.
4.2.1 Verification testing. The following tests and test methods assure universal joint integrity within
typical operating conditions and applications. Alternate methods are allowed with prior approval by the
qualifying activity. The test methods described herein are the preferred methods, and shall take
precedence when alternate test methods result in differing or conflicting results.
4.2.2 Test equipment and inspection facilities. Test and measuring equipment and inspection
facilities of sufficient accuracy, qualify and quality to permit performance of the required inspection shall
be established and maintained by the contractor. The establishment and maintenance of a calibration
system to control the accuracy of the measuring and test equipment (i.e. NCSL Z540.1, ISO 10012-1, or
equivalent) shall be required.
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