The 6-axis robot arm is the workhorse of industrial automation. With six degrees of freedom (6-DOF), it can reach any position and orientation within its workspace, making it the most versatile robot type available. Prices range from $8,000 for a light-duty 3 kg Chinese model to $150,000+ for a heavy-duty 500 kg FANUC or ABB arm.
This guide provides a complete price matrix by payload and reach, compares Chinese manufacturers against global leaders, and helps you select the right 6-axis robot for your application.
What Is a 6-Axis Robot?
A 6-axis robot arm has six rotational joints (axes) that work together to move the end-effector (tool) to any position and orientation in 3D space. Think of it as a mechanical human arm: the base rotates (axis 1), the shoulder lifts (axis 2), the elbow bends (axis 3), and the wrist rolls, pitches, and yaws (axes 4, 5, 6).
The Six Axes Explained
| Axis | Joint | Motion | Purpose |
|---|---|---|---|
| Axis 1 | Base | Rotation (±180°) | Sweep left/right |
| Axis 2 | Shoulder | Pivot (±180°) | Reach forward/back |
| Axis 3 | Elbow | Pivot (±180°) | Extend up/down |
| Axis 4 | Wrist roll | Rotation (±360°) | Rotate tool |
| Axis 5 | Wrist pitch | Pivot (±120°) | Tilt tool up/down |
| Axis 6 | Wrist yaw | Rotation (±360°) | Spin tool |
Advantages of 6-DOF
- Full workspace access: Can reach around, behind, and underneath objects
- Complex path capability: Follows curves, circles, and 3D contours precisely
- Orientation control: Maintains exact tool angle regardless of position
- Compact footprint: Works in a spherical envelope, saving floor space vs gantry systems
- Versatility: One robot can weld, paint, assemble, palletize, and more with different end-effectors
When You Do NOT Need 6 Axes
Not every application requires 6-DOF. If your task is primarily 2D pick-and-place, a 4-axis SCARA robot is faster and cheaper. If motion is linear, a cartesian gantry is more rigid and economical. Only invest in 6 axes when you genuinely need the orientation flexibility.
6-Axis Robot Price Matrix by Payload
Payload is the single biggest price driver. A 3 kg arm suitable for assembly costs $8,000 – $25,000, while a 500 kg palletizing arm runs $80,000 – $200,000.
Light Payload (3–10 kg)
| Brand | Model | Payload | Reach | Repeatability | Price (FOB) |
|---|---|---|---|---|---|
| Estun | ER3-600 | 3 kg | 600 mm | ±0.02 mm | $8,000 – $12,000 |
| Estun | ER6-1400 | 6 kg | 1,400 mm | ±0.05 mm | $12,000 – $18,000 |
| Estun | ER10-1600 | 10 kg | 1,600 mm | ±0.05 mm | $15,000 – $22,000 |
| SIASUN | SR3 | 3 kg | 620 mm | ±0.02 mm | $10,000 – $15,000 |
| SIASUN | SR6C | 6 kg | 1,450 mm | ±0.05 mm | $14,000 – $20,000 |
| EFORT | QJR3-1 | 3 kg | 560 mm | ±0.02 mm | $9,000 – $13,000 |
| FANUC | LR Mate 200iD | 7 kg | 717 mm | ±0.01 mm | $25,000 – $38,000 |
| FANUC | M-10iD/10L | 10 kg | 1,636 mm | ±0.02 mm | $35,000 – $50,000 |
| ABB | IRB 1100 | 4 kg | 580 mm | ±0.01 mm | $28,000 – $40,000 |
| KUKA | KR 6 R900 | 6 kg | 901 mm | ±0.02 mm | $30,000 – $42,000 |
| Yaskawa | GP7 | 7 kg | 927 mm | ±0.01 mm | $25,000 – $35,000 |
Applications: Electronics assembly, machine tending, small part welding, quality inspection, lab automation, dispensing.
Medium Payload (20–50 kg)
| Brand | Model | Payload | Reach | Repeatability | Price (FOB) |
|---|---|---|---|---|---|
| Estun | ER20-1780 | 20 kg | 1,780 mm | ±0.05 mm | $18,000 – $28,000 |
| Estun | ER50-2100 | 50 kg | 2,100 mm | ±0.06 mm | $25,000 – $38,000 |
| SIASUN | SR20C | 20 kg | 1,750 mm | ±0.06 mm | $22,000 – $32,000 |
| SIASUN | SR50C | 50 kg | 2,050 mm | ±0.06 mm | $28,000 – $42,000 |
| EFORT | QJR20-1 | 20 kg | 1,750 mm | ±0.06 mm | $20,000 – $30,000 |
| FANUC | M-20iD/25 | 25 kg | 1,831 mm | ±0.02 mm | $45,000 – $65,000 |
| FANUC | M-710iC/50 | 50 kg | 2,050 mm | ±0.04 mm | $55,000 – $78,000 |
| ABB | IRB 4600 | 20–60 kg | 2,050 mm | ±0.05 mm | $45,000 – $72,000 |
| KUKA | KR 20 R1810 | 20 kg | 1,813 mm | ±0.04 mm | $42,000 – $60,000 |
| Yaskawa | GP25 | 25 kg | 1,730 mm | ±0.03 mm | $40,000 – $58,000 |
Applications: Welding (MIG, TIG), painting, machine tending, material handling, grinding/polishing, assembly of medium parts.
Heavy Payload (100–200 kg)
| Brand | Model | Payload | Reach | Repeatability | Price (FOB) |
|---|---|---|---|---|---|
| Estun | ER100-2500 | 100 kg | 2,500 mm | ±0.08 mm | $35,000 – $55,000 |
| Estun | ER165-2800 | 165 kg | 2,800 mm | ±0.08 mm | $42,000 – $65,000 |
| SIASUN | SR100 | 100 kg | 2,490 mm | ±0.08 mm | $38,000 – $58,000 |
| SIASUN | SR210 | 210 kg | 2,688 mm | ±0.1 mm | $48,000 – $72,000 |
| EFORT | QJR100-1 | 100 kg | 2,490 mm | ±0.08 mm | $35,000 – $52,000 |
| FANUC | M-710iC/70 | 70 kg | 2,050 mm | ±0.04 mm | $62,000 – $85,000 |
| FANUC | R-2000iD/100F | 100 kg | 2,600 mm | ±0.05 mm | $70,000 – $100,000 |
| ABB | IRB 6700-150 | 150 kg | 2,750 mm | ±0.05 mm | $75,000 – $110,000 |
| KUKA | KR 120 R2500 | 120 kg | 2,500 mm | ±0.05 mm | $65,000 – $95,000 |
Applications: Spot welding, palletizing, heavy material handling, press tending, casting extraction.
Extra Heavy Payload (200 kg+)
| Brand | Model | Payload | Reach | Repeatability | Price (FOB) |
|---|---|---|---|---|---|
| Estun | ER300-2800 | 300 kg | 2,800 mm | ±0.1 mm | $55,000 – $85,000 |
| Estun | ER500-2700 | 500 kg | 2,700 mm | ±0.15 mm | $70,000 – $110,000 |
| SIASUN | SR300 | 300 kg | 2,800 mm | ±0.1 mm | $58,000 – $88,000 |
| FANUC | M-900iB/360 | 360 kg | 2,655 mm | ±0.05 mm | $95,000 – $135,000 |
| FANUC | M-2000iA/1200 | 1,200 kg | 3,734 mm | ±0.18 mm | $200,000+ |
| ABB | IRB 7600-500 | 500 kg | 2,550 mm | ±0.05 mm | $100,000 – $150,000 |
| KUKA | KR 600 FORTEC | 600 kg | 2,826 mm | ±0.06 mm | $110,000 – $160,000 |
Applications: Automotive body handling, heavy palletizing (bags, blocks), foundry extraction, large part machining, press-to-press transfer.
Chinese Manufacturers: Estun ER Series Deep Dive
Estun's ER series is the most widely exported Chinese 6-axis robot line. After acquiring Cloos (Germany) in 2019, Estun significantly upgraded their motion control and software.
ER Series Product Line
| Series | Payload Range | Reach Range | Key Feature |
|---|---|---|---|
| ER3 – ER10 | 3–10 kg | 560–1,600 mm | Compact, fast, assembly/handling |
| ER12 – ER20 | 12–20 kg | 1,400–2,010 mm | Most popular, welding/handling |
| ER30 – ER80 | 30–80 kg | 1,800–2,200 mm | Medium handling, machine tending |
| ER100 – ER210 | 100–210 kg | 2,300–2,800 mm | Spot welding, palletizing |
| ER300 – ER500 | 300–500 kg | 2,500–2,800 mm | Heavy palletizing, press tending |
Why Estun ER Series Stands Out
- Own servo motors and drives: Estun manufactures their own servo systems, ensuring supply chain control
- Cloos welding DNA: Welding software and path planning derived from Cloos decades of expertise
- Harmonic and RV reducers: Uses Nabtesco (Japan) or domestic high-end reducers depending on model
- Price-to-performance: Best ratio among Chinese 6-axis brands
SIASUN vs Estun vs EFORT: Chinese Brand Comparison
| Factor | Estun | SIASUN | EFORT |
|---|---|---|---|
| Market position | #1 Chinese industrial robot | #2, state-backed | #3, growing fast |
| Annual shipments | 15,000+ | 10,000+ | 8,000+ |
| Price positioning | Mid-range | Slightly higher | Competitive |
| Best application | Welding, general handling | Automotive, semiconductor | Welding, laser processing |
| International exports | Strong (40+ countries) | Moderate | Growing |
| Technology edge | Cloos acquisition | CAS research backing | Italian acquisition (Evolut) |
| Reducer supply | Nabtesco + domestic | Nabtesco + domestic | Mainly domestic |
| After-sales abroad | Distributors in 20+ countries | Limited international service | Limited international service |
Detailed FANUC vs ABB vs KUKA vs Chinese Comparison
| Factor | FANUC | ABB | KUKA | Estun (Chinese) |
|---|---|---|---|---|
| Repeatability (20kg class) | ±0.02 mm | ±0.02 mm | ±0.04 mm | ±0.05 mm |
| MTBF | 80,000+ hours | 80,000+ hours | 70,000+ hours | 40,000–50,000 hours |
| Speed (J1 axis, 20 kg) | 195°/s | 200°/s | 175°/s | 150°/s |
| Controller | R-30iB Plus | OmniCore | KR C5 | EC series |
| Offline programming | ROBOGUIDE | RobotStudio | KUKA.Sim | EstunSIM |
| Ecosystem maturity | Excellent | Excellent | Excellent | Developing |
| Global service network | 260+ locations | 100+ countries | 100+ countries | 40+ countries |
| Price (20 kg, 1800 mm) | $45,000–$65,000 | $45,000–$65,000 | $42,000–$60,000 | $18,000–$28,000 |
| **Savings with Chinese** | — | — | — | **55–60%** |
Applications by Payload Class
Choosing the right payload is critical. Here is a quick reference.
3 kg Payload
- Electronics assembly and testing
- Small part sorting and packaging
- Lab sample handling
- Screw driving and dispensing
6 kg Payload
- CNC machine tending (small parts)
- Light MIG/TIG welding
- Camera-guided pick-and-place
- Polishing and deburring small parts
10 kg Payload
- Standard welding (MIG, TIG)
- Painting and coating
- Medium part handling
- Assembly operations
20 kg Payload
- The sweet spot for welding robots
- Painting with heavy spray guns
- Machine tending (medium CNC)
- Material handling up to 15 kg effective
50 kg Payload
- Spot welding with integrated gun
- Heavy machine tending
- Material removal (grinding, deburring)
- Multi-process welding with heavy torch
100 kg+ Payload
- Automotive spot welding (with servo gun)
- Palletizing bags, boxes, and heavy loads
- Press tending and stamping
- Foundry and die-casting extraction
- Large part handling and assembly
Integration Costs for 6-Axis Robots
Buying the robot arm is step one. Here is what the full integration typically costs.
| Integration Component | Cost Range | Notes |
|---|---|---|
| End-of-arm tooling | $2,000 – $25,000 | Gripper, torch, gun, spindle |
| Robot base / pedestal | $500 – $3,000 | Floor mount or elevated |
| Safety fencing + light curtains | $2,000 – $12,000 | Required for non-cobot installations |
| Electrical and pneumatic hookup | $1,500 – $5,000 | Panels, wiring, air supply |
| Programming and path teaching | $3,000 – $15,000 | More for complex multi-part programs |
| Risk assessment documentation | $1,000 – $3,000 | Required for CE / OSHA compliance |
| Operator training | $1,000 – $3,000 | Typically 2–5 days |
| Commissioning and runoff | $2,000 – $8,000 | On-site start-up and acceptance testing |
| **Total integration** | **$13,000 – $74,000** | **50–120% of robot arm cost** |
Frequently Asked Questions
How much does a 6-axis robot cost?
Prices range from $8,000 (Chinese, 3 kg payload) to $150,000+ (Japanese/European, 500 kg+ payload). The most common 20 kg class costs $18,000 – $28,000 from Chinese brands or $42,000 – $65,000 from FANUC/ABB/KUKA.
What is the difference between 6-axis and 7-axis robots?
A 7th axis adds an extra degree of freedom, typically at the shoulder or wrist. This eliminates singularity issues and allows the robot to reach around obstacles more easily. Common in painting and certain welding applications. Adds $5,000 – $15,000 to the price.
Are Chinese 6-axis robots accurate enough?
For most industrial applications, yes. Chinese 6-axis robots achieve ±0.05 – ±0.08 mm repeatability, which is sufficient for welding, palletizing, machine tending, painting, and general handling. Applications requiring ±0.02 mm or better (precision assembly, optical alignment) should use FANUC or ABB.
How do I calculate the payload I need?
Payload = weight of the part + weight of the gripper/tool + weight of any adapter plates. Always leave a 20–30% margin. For example, if your part weighs 8 kg and your gripper weighs 3 kg, you need at least a 15 kg payload robot (11 kg actual + margin).
What maintenance does a 6-axis robot need?
Routine maintenance includes grease replenishment (every 3,000–10,000 hours), battery replacement for encoders (every 2–3 years), cable inspection (annually), and brake testing. Chinese robots may require more frequent reducer maintenance.
Can I retrofit a 6-axis robot for different tasks?
Yes. One of the key advantages of 6-axis robots is their versatility. Changing the end-effector and reprogramming allows the same robot to switch between welding, grinding, handling, and other tasks.
Browse 6-Axis Robots on GrabaRobot
GrabaRobot lists 6-axis robots from Estun, SIASUN, EFORT, and other verified Chinese manufacturers across all payload classes. Compare models, view detailed specifications, and request factory-direct quotes.
Not sure which payload or reach you need? Tell us your application details and we will recommend the right 6-axis robot for your operation.