Quick Answer: Cobot palletizers handle end-of-line stacking at 8-14 cases per minute for $50,000-$120,000 — less than half the cost of traditional robotic palletizers. They're ideal for small-to-mid-size manufacturers running 1-3 lines at under 800 cases per hour. Most deployments pay back in 10-18 months by eliminating the most physically demanding job on the production floor while reducing pallet-related injuries by 80-90%.
Why Palletizing Is the Perfect Cobot Application
Palletizing sits at the intersection of three trends that make cobot automation compelling:
-
It's physically brutal. Palletizing workers lift and stack 10-25 kg boxes hundreds of times per shift. Injury rates are 2-3x the manufacturing average. Workers' compensation claims for back injuries from repetitive lifting average $35,000-$75,000 per incident.
-
It's hard to staff. Palletizing is the job nobody wants. Turnover rates for dedicated palletizers exceed 150% annually at many facilities. Finding and keeping reliable palletizing staff is increasingly difficult.
-
It's repetitive and predictable. Same boxes, same patterns, same pallets. This is exactly the kind of task where cobots excel — consistent, repetitive, with well-defined inputs and outputs.
Cobot Palletizing System Components
The Robot
Standard 6-axis cobots with sufficient payload and reach. The key specification for palletizing is the combination of payload capacity at maximum reach and the reach needed to stack to full pallet height (typically 1,800-2,000mm).
| Cobot Model | Payload | Reach | Palletizing Suitability | |---|---|---|---| | UR10e | 12.5 kg | 1,300 mm | Light cases only, limited height | | UR20 | 20 kg | 1,750 mm | Good — handles most applications | | FANUC CRX-10iA/L | 10 kg | 1,418 mm | Light cases, good reach | | FANUC CRX-25iA | 25 kg | 1,889 mm | Best payload and reach combination | | ABB GoFa 12 | 12 kg | 1,520 mm | Light-to-medium cases | | Doosan H2515 | 25 kg | 1,500 mm | Good payload, moderate reach |
Bold indicates the most suitable models for general palletizing.
Important note on payload: The advertised payload includes the gripper weight. A vacuum gripper for palletizing weighs 3-8 kg, leaving 12-22 kg of effective box-lifting capacity for the cobot models listed above.
The Gripper
| Gripper Type | Box Weight | Box Types | Cost | |---|---|---|---| | Vacuum (foam pad) | Up to 25 kg | Sealed cartons, shrink-wrapped | $2,000-$5,000 | | Vacuum (cup array) | Up to 25 kg | Most cartons, flexible surfaces | $3,000-$8,000 | | Mechanical (clamp) | Up to 25 kg | Bags, irregular shapes, open-top | $4,000-$12,000 | | Hybrid (vacuum + clamp) | Up to 25 kg | Mixed product types | $6,000-$15,000 |
Vacuum grippers handle 80% of palletizing applications. For bags (flour, fertilizer, animal feed) or open-top containers, mechanical clamp grippers are required.
Palletizing Software
Dedicated palletizing software dramatically simplifies programming. Instead of teaching individual waypoints, the operator defines:
- Box dimensions and weight
- Pallet dimensions
- Stack pattern (column, interlocked, pinwheel)
- Number of layers
- Pallet pickup and approach points
The software automatically generates collision-free robot paths for every box placement.
Leading platforms:
- Robotiq Palletizing Solution — Purpose-built for UR cobots. $15,000-$20,000 including software, hardware, and mounting.
- Pally (Rocketfarm) — Cross-platform palletizing software. Supports UR, FANUC, ABB. $8,000-$15,000.
- OnRobot Palletizer — Integrated solution for OnRobot ecosystem. $12,000-$18,000.
- FANUC PalletTool — FANUC-native palletizing package. Included with CRX palletizing kits.
Performance: Cobot vs. Traditional Palletizers
| Metric | Cobot Palletizer | Traditional Robot Palletizer | Conventional Layer Palletizer | |---|---|---|---| | Speed | 8-14 cases/min | 20-35 cases/min | 15-40 cases/min | | Cases/hour | 480-840 | 1,200-2,100 | 900-2,400 | | Max box weight | 20-25 kg | 50-80 kg | 50-100 kg | | Pallet patterns | Unlimited | Unlimited | Limited by forming mechanism | | Changeover time | 5-15 minutes | 15-60 minutes | 30-120 minutes | | Cell footprint | 3-6 sq m | 15-30 sq m | 20-50 sq m | | Cell cost | $50K-$120K | $150K-$400K | $200K-$600K | | Lines served | 1 (sometimes 2) | 1-4 | 1-2 |
ROI Analysis
Cost of Manual Palletizing
| Cost Element | Annual Cost | |---|---| | Labor (2 palletizers × 2 shifts × $50,000 fully loaded) | $200,000 | | Overtime (peak periods) | $25,000 | | Workers' comp claims (1.5 claims/yr × $45,000 avg) | $67,500 | | Turnover costs (recruitment, training × 150% rate) | $30,000 | | Lost productivity (fatigue, breaks, variability) | $15,000 | | Total | $337,500 |
Cost of Cobot Palletizing
| Cost Element | Annual Cost | |---|---| | System amortization ($95,000 over 5 years) | $19,000 | | Maintenance and parts | $4,000 | | Energy | $1,200 | | Operator labor (1 person monitoring + feeding, 2 shifts) | $100,000 | | Total | $124,200 |
Net Annual Savings: $213,300
Payback period: 5.3 months on a $95,000 investment.
The ROI is exceptionally fast because palletizing replacement eliminates high-cost labor with high injury rates and high turnover. The workers' compensation and turnover cost reduction alone nearly covers the annual system cost.
Implementation Guide
Site Assessment
Before purchasing:
- Measure your line speed. If you're producing over 15 cases per minute, a cobot won't keep up. You need a traditional palletizer.
- Weigh your heaviest case. Above 20 kg (including gripper weight deduction), evaluate 25 kg cobots carefully or consider traditional options.
- Check ceiling height. The cobot needs clearance for full pallet height plus overhead approach. Minimum 3.5m clear height for standard pallets.
- Plan pallet handling. How do full pallets leave and empty pallets arrive? Manual pallet jack? Conveyor? This is often the overlooked bottleneck.
Common Pallet Patterns
| Pattern | Stability | Density | Programming Complexity | |---|---|---|---| | Column stack | Low | Highest | Simplest | | Interlocked | High | Medium-high | Moderate | | Pinwheel | Medium-high | Medium | Moderate | | Split row | Medium | Medium | Low |
Interlocked patterns are recommended for most applications — they provide the best balance of stability and density, and palletizing software generates them automatically.
Safety Considerations
Cobot palletizing presents unique safety considerations:
- The box is the hazard, not the robot. A 20 kg box at 1.5 m/s carries significant kinetic energy. The risk assessment must consider box-to-human contact scenarios, not just robot-to-human.
- Pallet height creates risk. Stacking at 1,800mm means the robot operates above head height at the top layers. Define exclusion zones for the upper portion of the stacking cycle.
- Falling boxes. If a vacuum seal fails mid-stack, a box falls from height. Floor-level exclusion zones around the pallet during stacking are essential.
For detailed safety assessment guidance, see our Cobot Safety Assessment Guide.
Scaling From One to Many
The progression for most facilities:
- First cobot palletizer — Single line, highest-volume product. Prove the concept, train operators.
- Second station — Second-highest-volume line. One operator now manages both stations.
- Multi-product capability — Program additional pallet patterns for product changeovers.
- Dual-pallet station — Configure the cobot to build two pallets alternately (one being built while the other is removed).
Use the Robot Finder to compare cobot palletizing solutions and the TCO Calculator to model your specific ROI.
Frequently Asked Questions
How fast can a cobot palletize?
Cobot palletizers achieve 8-14 cycles per minute (480-840 cases/hour). This is sufficient for most single-line operations under 800 cases/hour. For higher throughput, traditional robotic palletizers (20-35 cycles/minute) are required.
What is the maximum payload?
Current cobot palletizers handle boxes up to 20-25 kg (after accounting for gripper weight). The FANUC CRX-25iA and UR20 offer the highest effective payload. For boxes over 25 kg, traditional industrial palletizers are needed.
How much does it cost?
Complete cobot palletizing cells cost $50,000-$120,000 — less than half the cost of traditional robotic palletizers ($150,000-$400,000). Most deployments pay back in 10-18 months through labor savings, injury reduction, and turnover cost elimination.