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  • Users: damc
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  1. damc

    Surface Cracks in 4340 Ground Washers

    We are reverse engineering a steel adjustment washer and lab analysis determined the original to conform to AISI 4340 per ASTM A29-99. Hardness 53HRC. A rough turned bar was heat treated prior to finish machining. The washer was stress relieved at 374 degrees F. after parting off. After finish...
  2. damc

    DORNIER 328 Landing Gear Bearings and Bushings

    We are having difficulty finding replacement parts for Dornier 328 landing gear, especially Sarma PTFE lined bushings and bearings. We have found a few parts but most have been no quoted. Does anyone know a supplier or contact for factory support?
  3. damc

    Availability of E 9310 alloy steel

    I have a French made aircraft pin that our metalurgist determined to be close in composition to E 9310. It is 42 HRC with a suface hardness of 62 HRC .020 to .025 deep on one diameter. I have not been able to find a supplier of this matrial though there are many specs. I would certainly...
  4. damc

    Availability of Phosphor Bronze UNS C52400

    Can anyone tell me if Phosphor Bronze UNS C52400 is available in round bars over 4 inch dia. and if so where?
  5. damc

    Cad plating thickness on close tolerance diameters

    I consistently run into dimensioning problems on parts required to have Cad Plating per QQ-P-416 on close tolerance diameters.(.0005 inch or less)My question is: How can you allow a tolerance for plating without effectivly eliminating most of the tolerance for machining? For Example, Class 3...
  6. damc

    electoless nickle in hydraulic cylinder bores

    Does electoless nickle in hydraulic cylinder bores have the lubticity of hard chrome. I would appreciate information concerning the application of it using both static and dynamic seals. Are there any negative factors and what thickness can it be plated without losing dimensional accuracy.
  7. damc

    French Material Spec 35NCD16

    Does anyone know a USA supplier for this material? If not, An overseas supplier would be helpful. 200mm. Diameter x Approximatley 600mm length bar is needed.

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