This product case describes a CNC machined 6061-T6 aluminum roller carrier assembly for a medical infusion pump. The part supports miniature bearings and stainless pins that guide the peristaltic rollers around the tubing path, so the geometry must remain stable during assembly and long operating cycles.
Part Function
The roller carrier connects the motor-side structure to the rolling mechanism. It includes bearing pockets, roller pin holes, dowel references, mounting counterbores and a smooth tubing guide radius. Each feature contributes to roller pressure, noise control and repeatable flow delivery.
Manufacturing Process
The process used staged roughing, semi-finishing and final boring to maintain pocket size and flatness. A dedicated fixture supported the thin sections while locating from the future assembly datums. Counterbores and dowel holes were finished after the main profile to reduce accumulated error.
Edges near the tubing path were deburred carefully to remove sharp transitions without changing the designed radius. Bearing seats were protected from over-polishing so the final fit remained predictable.
Inspection And Result
CMM data confirmed the hole pattern and bearing pocket locations. Gauge pins verified small alignment bores, while visual inspection checked burr removal and surface quality. The finished carrier provided a clean assembly fit with stable roller spacing and a surface suitable for anodizing.
The same process can support prototype batches, validation samples and small production runs for related infusion pump platforms.
FAQ
What was the product in this case study?
The product was a CNC machined 6061-T6 aluminum roller carrier assembly for a medical infusion pump.
Which features required the most control?
The bearing pockets, roller pin holes, motor alignment holes, tubing guide radius, flatness and chamfered edges were the most important.
Why was 6061-T6 selected?
It offered stable machinability, low weight, corrosion resistance after anodizing and good strength for a compact pump mechanism.
How was the part inspected?
CMM checks, gauge pins, bearing fit checks, flatness inspection and visual deburring review were used before release.
Can the design be customized?
Yes. Roller count, bearing size, motor hole pattern, tubing radius and surface treatment can be adjusted for different pump platforms.
How were the parts delivered?
They were cleaned, protected with foam and clear pouches, and shipped with batch and inspection identification.
Contact: tanghangyun@oemach.com