Large Part Manufacturing • Value-Added Services • Fully Functional Assemblies

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Magna Machine Company

11180 Southland Road
Cincinnati, OH 45240
Ph: 513.851.6900

Recent Projects


Shaft Lift Fan Impeller & Lift fan Assembly for the Department of Navy


Magna Machine Company worked in conjunction with our sister company General Tool Company, to machine and assemble the lift fan impeller assembly for the Navy’s Landing Craft Air Cushion (LCAC100 Class Hovercraft).

Capabilities Applied/Processes

Primary: Large Diameter, contouring, & spline machining in Super Bay Secondary:

  • Faro Arm, de-burr & clean
  • Static Balancing
  • Dynamic Balancing

Equipment Used to Manufacture Part

  • Bost T4F Horizontal Turn/Mill

Overall Part Dimensions

  • Length: 3104.91mm (10’2”)
  • I.D. Diameter: 1082mm (42.598”)
  • O.D. Diameter: 1758mm (69.212”)
  • Weight: 816.62kg (1800lbs.)

Tightest Tolerances

  • +/-.0004 on two diameters
  • Class 4 Spline (tightest tolerance listed in Machinists Handbook)

Material Used

  • 15-5 PH 1050 Stainless Steel

Material Finish

  • 32 Micro

Industry for Use

  • Navy Sea Systems Command

In Process Testing/Inspection Performed

  • Spline gage
  • Faro Arm
  • Machine Probe


  • 5 Assemblies

Delivery/Turnaround Time

  • 2-1/2 Week per unit

Delivery Location

  • Textron - New Orleans, LA

Standards Met

  • All print specs met per customer request

Special Features

  • I.D. Contour and Class 4 Spline


High level of complex tooling needed for the I.D. contour and the spline.
Purpose: part of Navy Hovercraft.
Customer chose us based on our machining capabilities, specifically the deep boring and spline machining.
Modifications made on dampening silent boring bar to reach the necessary depth keeping a good finish.
Special spline tool and spline gages used.
Finished Product: customer pleased with our capability to hold the bore and spline tolerances without any finish grinding.


Our experts are ready to discuss our capabilities and your needs.

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