Head to head
ABB IRB 6640 vs Comau NJ-220
A specification duel across payload, reach, precision, and footprint, with a plain read on which arm suits which job.
Heavy-payload foundry-proven material handler
Heavy-payload arm for handling and press tending
Specification duel
Green marks the stronger figure. Unconfirmed specs are shown but not scored.
The verdict
On paper these two are close, 235 kg against 220 kg and 2550 mm against 2701 mm of reach, near enough that the spec sheet alone will not decide it. They run different controllers, the ABB IRB 6640 on the IRC5 and the Comau NJ-220 on the C5G, so whichever platform your team already programs and stocks parts for is a real tiebreaker. Mounting options differ: the ABB IRB 6640 lists Floor, and the Comau NJ-220 lists Floor and Ceiling.
Choose this one when
Job fit first, then the controller and cell constraints that decide which arm you can actually install.
Choose the ABB IRB 6640 when
- Proven in foundry and press-tending duty
- High payload with foundry-sealed options
- Rigid structure holds accuracy under load
- Long service life in continuous operation
Watch for
- Large footprint and foundation needs
- Not economical for lighter-duty tasks
Choose the Comau NJ-220 when
- High payload for press and foundry duty
- Rigid structure for consistent accuracy under load
- Long reach for large-part transfer
- Proven in automotive body shop lines
Watch for
- Large footprint and foundation needs
- Higher capital cost versus mid-payload arms
Controller ecosystem
Programming habits, spare parts, and pendant familiarity often decide the pick when payloads are close.
- Brand
- ABB
- Controller
- IRC5
- Class
- 6-axis industrial
Service, spares, and pendant training for the ABB IRB 6640 run through ABB's IRC5 stack.
- Brand
- Comau
- Controller
- C5G
- Class
- 6-axis industrial
Service, spares, and pendant training for the Comau NJ-220 run through Comau's C5G stack.
These arms run different controllers (IRC5 vs C5G). If your team already programs one of them, retraining programmers and stocking a second set of spares usually costs more than a small payload or reach advantage on paper.
Mounting, footprint, and mass
How the arm can be oriented in the cell, and how much mass you have to mount.
| Field | ABB IRB 6640 | Comau NJ-220 |
|---|---|---|
| Mounting | Floor | Floor and Ceiling |
| Robot mass | 1,310 kg | 1,220 kg |
| Protection (IP) | IP67 | IP65 / IP67 |
Heavier arms want stiffer bases and more clearance around the swept volume, and they push freight and rigging costs up on the install. IP ratings only cover the section they name, so a wrist-only rating protects the wrist and nothing else; check the body rating separately before you commit the arm to a washdown or dusty cell.
Application fit
Where each arm is aimed, based on the applications listed on its robot page.
Both pages list material handling, machine tending, and palletizing.
ABB IRB 6640 covers
Comau NJ-220 covers
Speed and cycle-time planning
Speed is rarely a single datasheet number across brands. Use payload, reach, and class as the planning frame, then confirm cycle time in a path study.
The ABB IRB 6640 is a 6-axis industrial arm rated 235 kg at 2550 mm with ±0.05 mm repeatability. The Comau NJ-220 is a 6-axis industrial arm rated 220 kg at 2701 mm with ±0.08 mm. Class changes how speed shows up in a cell: collaborative arms slow down near people and can speed up in a guarded mode, while industrial arms run at rated speed inside a fence or scanner field. Which arm cycles faster on your part depends on the path, the payload, and the safeguarding, so confirm the takt with a path study before you quote it.
Common questions
- Which has more payload, the ABB IRB 6640 or the Comau NJ-220?
- The ABB IRB 6640 has more payload at 235 kg versus 220 kg.
- Which reaches farther?
- The Comau NJ-220 has more reach at 2701 mm versus 2550 mm.
- Which is more precise?
- The ABB IRB 6640 holds tighter repeatability at ±0.05 mm.
- Should I choose the ABB IRB 6640 or the Comau NJ-220?
- Match the pick to the job. The ABB IRB 6640 is a 6-axis industrial arm at 235 kg and 2550 mm. The Comau NJ-220 is a 6-axis industrial arm at 220 kg and 2701 mm.
- Do the ABB IRB 6640 and Comau NJ-220 use the same controller?
- No. The ABB IRB 6640 uses IRC5 and the Comau NJ-220 uses C5G.
- How do the IP ratings compare?
- The ABB IRB 6640 is rated IP67. The Comau NJ-220 is rated IP65 / IP67. Check wrist versus body coverage before washdown or dusty cells.