Onsrud CR Series
Key Specifications
Spindle Taper
Rapid Traverse
Spindle Power
machine type
table formats
x travel
Overview
The Onsrud CR Series is a heavy-duty industrial CNC router from C.R. Onsrud Inc. of Troutman, North Carolina, designed for high-production composite and aluminum routing in aerospace, marine, defense, and industrial manufacturing environments. C.R. Onsrud has been building industrial CNC routers in the United States since 1981 and is recognized as one of the most rigidly-constructed router manufacturers in North America — a reputation built on supplying production aerospace facilities where machine downtime and part accuracy failures carry significant financial and schedule consequences.
The CR Series is characterized by its exceptionally heavy moving-gantry structure fabricated from precision-welded structural steel, with machined linear bearing surfaces and precision ball screws throughout. This construction philosophy makes CR Series machines notably heavier and stiffer than comparably-sized competitors, providing the structural loop stiffness necessary for routing thick CFRP laminates and aluminum sheet at aggressive feed rates without chatter or deflection. The payoff is extended tool life, better surface finish, and the ability to maintain part accuracy over millions of cycles in production environments.
Onsrud CR Series machines are particularly well-established in the aerospace composite trimming sector, where they are used by Tier 1 and Tier 2 composite structure manufacturers for CFRP panel trimming, edge routing, hole drilling, and countersink operations. The machines are also used in the marine industry for large fiberglass hull panel routing and in the defense sector for composite structure fabrication. Onsrud's history as a cutting tool manufacturer (before becoming a machine tool builder) gives the company unique insight into the relationship between spindle rigidity, tool deflection, and composite cut quality.
The CR Series is available in multiple table formats from 5 x 10 ft up to very large custom configurations, with standard 3-axis and optional 5-axis aggregate head or integrated A/C-axis 5-axis configurations. Onsrud builds and services their machines domestically, providing the fast service response that aerospace production environments require. The company's application engineering team has deep experience in composite routing process development and provides process qualification support for customers in regulated aerospace environments.
Full Specifications
| Parameter | Value |
|---|---|
| Machine Type | Heavy-duty moving-gantry industrial CNC router |
| Table Formats | 5 x 10 ft to custom large-format configurations |
| X Travel | 120 – 360 in (3,048 – 9,144 mm) depending on model |
| Y Travel | 60 – 120 in (1,524 – 3,048 mm) |
| Z Travel | 12 – 24 in (305 – 610 mm) |
| Spindle Speed | 18,000 – 24,000 RPM |
| Spindle Motor Power | 15 – 25 hp (11 – 18.7 kW) |
| Spindle Taper | ISO 30 / HSK-63F |
| Rapid Traverse Rate | Up to 1,800 ipm (45.7 m/min) |
| CNC Control | Fagor / Siemens (customer selectable) |
| Frame | Heavy precision-welded steel with machined bearing surfaces |
| Tool Changer | Optional 8-12 position automatic tool changer |
| Primary Materials | CFRP, fiberglass, Kevlar, aluminum sheet, honeycomb sandwich |
| Manufacturer | Homag - Weeke |
| Model | Vantech 480 |
| Gross Weight | 0.14 t |
| Phase Type | Three-phase |
Specifications sourced from machinio.com — verified 2026-03-28
Strengths & Limitations
Strengths
- Exceptionally heavy and rigid moving-gantry structure — heavier than most US competitors — provides superior cut quality, tool life, and accuracy in production composite and aluminum routing
- US-manufactured with domestic service and parts support, providing fast response times critical for aerospace and defense production environments
- Deep application experience in aerospace composite routing from both a machine tool and cutting tool perspective, enabling strong process qualification support for regulated applications
- Wide range of table configurations from standard 5 x 10 ft to large custom formats, accommodating diverse aerospace and marine composite part families
Limitations
- The heavy construction philosophy results in higher machine weight and installation requirements than lighter alternatives — requires adequate floor loading capacity and rigging for installation
- Onsrud's market presence is concentrated in aerospace and defense, with less visibility in general manufacturing markets — fewer user reviews and less online community discussion than higher-volume router brands
- Standard 3-axis base configurations require optional 5-axis head equipment for compound-curved trimming work; 5-axis configurations add significantly to cost
Best For
Frequently Asked Questions
01
Onsrud's philosophy is that structural mass and rigidity are the foundation of consistent composite routing quality. A heavier gantry structure has higher natural frequency and greater resistance to deflection under cutting forces, which directly improves surface finish, hole positional accuracy, and tool life. This is especially important in aerospace composite applications where part accuracy and process repeatability are contractually required.
02
Yes. Onsrud offers both aggregate angle-head attachments for fixed-angle trimming and integrated A/C-axis 5-axis head configurations for full simultaneous 5-axis capability. The 5-axis configurations are typically specified for aerospace applications requiring drill-normal capability on compound-curved composite surfaces. Onsrud's application engineers help customers select the appropriate head configuration for their specific part geometries.
03
Onsrud focuses on the high-end aerospace, defense, and marine composite production market where structural rigidity and uptime are the primary requirements. MultiCam serves a broader market including sign, display, and general industrial applications alongside aerospace interior work. Onsrud machines are generally heavier and more expensive; MultiCam machines offer a more accessible price point with good performance for less demanding applications.
04
Onsrud provides application engineering support including process qualification assistance, cutting parameter recommendations, and tooling guidance for specific material and composite layup combinations. Their domestic manufacturing means that machine and process documentation relevant to aerospace quality systems (AS9100, NADCAP) can be obtained efficiently. Onsrud field engineers have experience working in regulated aerospace production environments.
05
Yes. The CR Series handles aluminum sheet, aluminum composite panel (ACM), and aluminum-faced honeycomb sandwich at production rates, particularly in aerospace secondary structure applications. It is not a substitute for a dedicated aluminum machining center for structural deep-pocket milling, but for routing, trimming, and pattern drilling in aluminum sheet up to about 0.5 inch thick, the CR Series is capable and reliable.
Videos
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C.R. Onsrud, Inc.
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