A CNC aggregate — also called a machining aggregate or aggregate head — is a tool-holding unit that attaches to a CNC machine’s main spindle to perform operations that the spindle cannot do alone, including angular cutting, multi-blade sawing, horizontal boring, and 90° routing. Aggregates multiply what a single-spindle CNC machine can do without requiring a different machine or manual repositioning of the workpiece.
In CNC woodworking, panel processing, and furniture manufacturing, aggregates are essential for achieving complex profiles and compound-angle cuts in a single setup.
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How Does a CNC Aggregate Work?
A CNC aggregate connects to the main spindle — typically via an HSK 63F or ISO30 tool holder interface — and is stored in the machine’s automatic tool changer (ATC). When called by the CNC program, the aggregate is picked up like any other tool. Once mounted, it transmits the rotational power from the main spindle through internal gearing or belt drives to one or more output spindles positioned at a different angle or location.
The main spindle’s RPM is converted by the aggregate’s internal ratio to the appropriate output speed for the application. Most aggregates deliver output speeds in the range of 8,000–24,000 RPM depending on the design.
Types of CNC Aggregates
Angular Aggregate Heads
What they are: Angular aggregates redirect the output spindle at a fixed angle — typically 90°, 45°, or variable between 0° and 90° — from the main spindle axis. The most common type in woodworking and panel processing.
Applications: Edge routing on panels and doors, profile operations on furniture components, drilling at angles, compound-angle cuts on solid wood.
Common models (Hiteco): D SIDE series (90° fixed), ONE series (various angles), BIS series (horizontal output).
Multi-Blade Aggregates
What they are: Multi-blade aggregates carry multiple saw blades simultaneously, allowing multiple parallel cuts or grooves in a single pass. Blades are driven by a single output shaft.
Applications: Grooving panels for back panels, cutting multiple strips simultaneously from sheet material, dadoing operations in kitchen cabinet production.
Common models (Hiteco): MULTIBLADE series, ONE BLADE series in H=100, H=145, and H=180 height configurations.
Horizontal Boring Aggregates
What they are: Horizontal aggregates orient the output spindle perpendicular to the main spindle — horizontal relative to the machine table — enabling edge drilling and horizontal boring operations.
Applications: Shelf pin holes, Euro-style hardware holes, hinge boring on panel edges, dowel holes on furniture components.
Common models (Hiteco): HORIZONTAL LOW BORE series.
Notch Aggregates
What they are: Notch aggregates are designed specifically for cutting notches, dados, and step profiles — operations common in staircase manufacturing, solid wood furniture, and architectural millwork.
Applications: Stair tread notching, solid wood joinery, step profiles in structural timber.
Common models (Hiteco): NOTCH series, NOTCH FRESA series.
Copy and Profile Aggregates
What they are: These aggregates perform copying and profiling operations — following a template or programmed path to reproduce complex shapes. Common in chair manufacturing and custom furniture.
Applications: Chair leg profiling, curved component manufacturing, pattern following.
Common models (Hiteco): COPY ER series.
What CNC Machines Use Aggregates?
CNC aggregates with HSK 63F or ISO30 interfaces are compatible with automatic tool change CNC routers from all major manufacturers, including:
- Biesse — Rover, Skill, Winstore series
- SCM — Accord, Pratix, Morbidelli series
- Homag — BOF, BMG series
- IMA — Bima series
- Holz-Her — Dynestic series
- AXYZ and **MultiCam** — North American CNC routers with ISO30 spindles
- Thermwood — with ISO30 or HSK interfaces
The interface type (HSK 63F vs ISO30) is the critical compatibility factor. Check your spindle’s tool holder specification before selecting an aggregate.
How to Select the Right CNC Aggregate
Choosing the right aggregate requires answering three questions:
1. What operation do you need to perform?
Angular cuts ® angular head. Multiple parallel grooves ® multi-blade. Edge drilling ® horizontal boring. This determines the aggregate type.
2. What interface does your machine spindle use?
Most European CNC routers use HSK 63F. North American machines commonly use ISO30. Confirm your spindle interface before ordering — the aggregate must match exactly.
3. What is the required output height (H dimension)?
Many aggregates come in multiple height configurations (H=100, H=145, H=180mm, etc.) to suit different machine Z-axis clearances and part thickness requirements. The H dimension determines the distance from the spindle nose to the aggregate’s output tool.
Hiteco Aggregates: The Industry Standard
Hiteco (an Italian manufacturer) is the dominant brand for CNC machining aggregates used in woodworking, furniture, and panel processing. Their range covers all aggregate types and is compatible with virtually every European CNC router brand.
HS Spindles is a Hiteco aggregate supplier and also repairs Hiteco spindles. We carry the D SIDE, ONE, BIS, FOUR, MULTIBLADE, NOTCH, HORIZONTAL LOW BORE, and COPY series.
Key Hiteco aggregate series:
| Series | Type | Output Angle | Applications |
| D SIDE | Angular | 90° fixed | Edge routing, profile work |
| ONE | Single output | Variable | General angular operations |
| FOUR | 4-output | 90° | Multi-position drilling |
| MULTIBLADE | Multi-blade | 0° / 90° | Grooving, parallel cuts |
| NOTCH | Notch | 0° / 90° | Staircase, joinery |
| HORIZONTAL LOW BORE | Horizontal | 90° horizontal | Edge drilling, Euro holes |
| COPY ER | Copy/profile | Variable | Chair components, profiling |
| BIS | Angular | 90° | Compact angular routing |
| TILT BLADE | Angular blade | Tilting | Angled groove cuts |
Aggregate Maintenance and Repair
CNC aggregates are precision tools that require care. The most common issues include:
- Bearing wear in the internal output bearing (typically after 2,000–4,000 hours depending on application)
- Gear wear in heavy-duty multi-blade applications
- Seal failure leading to contamination of internal bearings
- Shaft or housing damage from crash events
At HS Spindles, we repair Hiteco aggregates as well as supply new units. If your aggregate has developed vibration, noise, or loss of precision, contact us for a diagnosis before ordering a replacement.
Frequently Asked Questions
What is a CNC aggregate used for?
A CNC aggregate is used to extend the capabilities of a CNC routing machine by adding angular cutting, horizontal boring, multi-blade sawing, or profile copying operations — all without repositioning the workpiece or changing machines.
What is the difference between an aggregate and a spindle?
A spindle is the machine’s primary motorised rotating unit. An aggregate is a passive tool-holder attachment that mounts in the spindle like a tool and redirects or multiplies the spindle’s output at a different angle or to multiple outputs.
Do aggregates work with any CNC machine?
Aggregates must match the machine’s spindle interface (HSK 63F or ISO30), ATC compatibility, and Z-axis height clearance. Most European CNC routers with ATC spindles are compatible with standard Hiteco aggregates.
How long do CNC aggregates last?
With proper maintenance and air purge, CNC aggregates typically last 2,000–5,000 hours of operation. Heavy applications (multi-blade, stone, or high-cycle use) reduce this. Rebuild and repair can restore a worn aggregate to full performance.
Where can I buy Hiteco aggregates in the US?
HS Spindles supplies Hiteco aggregates from our Yorba Linda, CA facility. Contact us for pricing and availability: +1 714-307-2332.
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