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CNC Turning & Milling of Shafts for an HVAC Application

Shafts for Commercial HVAC (Circulators and Pumps)

At Westboro Machine, we have nearly 50 years of experience providing precision machining services to customers. Our facility is equipped for milling, drilling, turning, specialty machining, and volume manufacturing for complex or intricate parts. We work with a variety of materials including brass, bronze, plastics, copper, steel, and aluminum. We also specialize in the machining of parts that are widely used in the commercial HVAC industry.

In the project highlighted here, we worked with a local HVAC customer who asked us to machine custom shafts designed for circulators and pumps. Each shaft required complex threading, smaller concentric diameters, and intricate keyways along its surface. Using our Trak 1840 lathe and HAAS VF4 4-axis mill, we machined 416T steel to produce a 21.181” long, 1-5/8” diameter part with tolerances as tight as ±.005”. This was a complex blanket order with a short delivery time that required multiple machining operations and extremely tight tolerances. Our veteran staff was able to program, setup, and efficiently conduct multiple machining operations in order to meet the customer’s project requirements. Each shaft was continuously inspected during and after production to ensure quality control and thread sizing standards. Our customer was impressed by each of our shaft’s custom surface finish that they could quickly tell the difference when compared to other vendors. As a result of our work, we have become their first choice for suppliers of custom shafts.

Since 1966, our 4,000 sq. ft. facility provides single prototypes as well as volume runs for small or large components. We are a single source facility that specializes in precision machining and provides secondary services like heat treating, grinding, anodizing, plating, coating, and painting services. We also specialize in producing rotary hub assemblies, carriages, spindle housings, air channels, and other HVAC parts. Our team strives to offer the highest level of quality control, superior customer service, and on-time delivery for challenging projects. For more information on our work in the HVAC industry, please contact us or refer to the table below.


Shafts Project Highlights

Project Name
Shafts for Commercial HVAC (Circulators and Pumps)
Capabilities Applied/ Processes
CNC Turning & Milling

Threads and Keyways
Equipment Used to Manufacture Part
Trak 1840 Lathe, HAAS VF4 4th Axis
Overall Part Dimensions
1-5/8’’ diameter x 21.181’’ long, with various threads, smaller diameters, and keyways
Tightest Tolerances
+/- .005"
Material Used
Material Finish
125 Surface Finish
In Process Testing/ Inspection Performed
Periodic in-production inspection, post-run inspection of all specs
Delivery/ Turnaround Time
On time
Standards Met
Certificate of Conformance with Material Certifications, Thread Size Standards

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