MIL-S-45387B(AT)
STANDARDS Military
MIL-STD-105 - Sampling Procedures and Tables for Inspection by
Attributes.
DRAWINGS
Inspection Equipment
K-8668989 - Supplementary Quality Assurance Provisions (SQAP's).
(Copies of specifications, standards, drawings, and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.)
3. REQUIREMENTS
* 3.1 Preproduction sample(s). Prior to the manufacture of torsion bar springs in quantities a preproduction sample(s) shall be submitted for examination and tests specified herein (see 4.4.11.3), to determine conformance to requirements of this specification. The bars submitted shall be fully representative of the bars proposed to be furnished under the production contract.
3.2 Workmanship and endurance. The workmanship shall be of a quality to assure that the torsion bars are free from any defects that compromise, limit, or reduce the bar capabilities herein expressed resulting from improper manufacturing practices. Torsion bars made in accordance with this specification shall be subjected to examinations and tests to prove torsion bar capabilities to meet endurance requirements.
* 3.2.1 Endurance life. Springs shall have an endurance life of not less than 45,000 cycles (see 4.4.11). Unless otherwise specified, each cycle shall be such that it imposes a deflection range from five (5) to one hundred (100) percent of the maximum wind up angle.
3.3 Material. Material shall be free from pipes, flakes, and heat checks and shall not contain any other defects which, due to their nature, degree, or extent, may effect suitability of the material for the intended use.
3.3.1 Continuous lengths. Material used for the torsion bar springs shall be of one continuous piece as cut from the full length bar as rolled.
* 3.3.2 Chemical composition. The chemical composition of the material shall provide the hardenability specified herein or on the applicable drawing. Where the material is steel, the phosphorous and sulfur content shall be limited to a maximum of 0.040 percent each.
* 3.3.3 Hardenability. The material shall have sufficient hardenability at half radius of finished bar body to obtain the minimum hardness as specified herein or on applicable drawing. Unless otherwise specified, when the material is steel, the hardenability shall be such as to obtain an
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