An aeronautics OEM was in need of A286 stainless steel dual-screw bolts for a jet engine application. The angle of the screws was skewed to fasten parts at differing orientations. The part had to withstand the rigors of extreme heat and tensile force.
A286 stainless steel parts are used in heat and cold extremes. It can be used in cryogenic conditions as cold as -320 and as hot as 1,300 degrees F. It is oxidation resistant up to 1,500 degrees F. It is also an extremely hard alloy with excellent tensile strength. It is perfect for highly stressful conditions, like those of a jet engine.
A286 can also be difficult to machine. This is where Boyer’s experience in machining difficult metals and their understanding of metallurgical properties make a difference. In this case, the hardened superalloy was machined in one setup. But this part also had a difficult design, with shafts for the dual screws set at divergent positions. Boyer used multi-axis Swiss machining to accommodate the differing angles of the shafts and threads of the screws. The components were also completed with a highly polished finish. The parts were ultrasonically cleaned. Boyer cleans all of their parts before packaging and shipping them.
The customer was pleased with the A286 dual-screw bolt. In the end, they were supplied a complex part with superior tensile strength that could withstand extreme temperature stresses. For more information on machining complex metals and plastics, contact Boyer, where quality is standard.
