CNC Milling & Horizontal Broaching of a Grey Iron Casting

CNC Milling & Horizontal Broaching of a Grey Iron Casting
CNC Milling & Horizontal Broaching of a Grey Iron Casting

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At Illinois Broaching Co., Inc., we’ve accumulated a great deal of practical machining experience in our 65 years, including the capability of providing multiple machining techniques on large parts. A customer asked us to machine a milled and broached railroad crossing gate arm made from a gray iron casting measuring 24" x 49".

Using a CNC mill, our team of highly skilled machinists milled the face, drilled the required holes and broached the spline according to the customer-supplied print. Functional verifications were also performed to ensure the arm mechanism would open and close correctly. Proper operation required that the spline orientation be held to 1/2° to ensure proper mesh.

Dimensional integrity is maintained by randomly inspecting two pieces every hour for quality control. This railroad arm is manufactured in lots of 200, delivered to this Chicago customer with lead times of 10 working days. To learn more about our large scale part capabilities and how it can help on your next project contact us directly.

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Highlights of this Horizontal Broaching Casting Project

Product Description
Broached RR Arm for Gate Crossing
Capabilities Applied/Processes
Mill Face, Drill and Broach with location
Equipment Used to Manufacture Part
CNC Mill, Horizontal Broach
Overall Part Dimensions
24” x 49”
Tightest Tolerances
Orientation of Spline held within 1/2 deg.
Material Used
Material Finish
Gray Iron Casting
In process testing/inspection performed
2 pcs/hour per Operation
Industry for Use
Delivery/Turnaround Time
10 working days
Delivery Location
Chicago, IL
Standards Met
Customer supplied print, 2D CAD Drawing
Product Name
RR Arm

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