How Many Cases Per Minute Can a Cobot Palletizer Handle?

It is the first question almost every plant asks us — and the honest answer is "it depends," followed immediately by the math that tells you exactly what it depends on. A cobot palletizer's cases per minute is not a fixed spec like its reach. It is the result of your case weight, your pallet pattern, and how the gripper picks. Here is how to work it out for your line before you compare any machines.

The short answer

For a collaborative (cobot) palletizer picking one case at a time, realistic sustained rates are typically 6 to 12 cases per minute, depending on case size, weight, and how far the robot travels between the conveyor and the pallet. With a multi-pick gripper that grabs two or more light cases per cycle, effective rates can reach 15 to 20+ cases per minute. These are typical industry ranges for cobot cells — your number comes from your cases and your pattern, which is why any quote that promises a rate without asking about them is guessing.

The cycle-time math

A palletizer's rate is just 60 seconds divided by the seconds in one pick-and-place cycle:

So the real question is never "how fast is the robot?" — it is "what will my cycle time be?" Four things decide that.

What actually sets your rate

1. Case weight and size

Heavier cases move slower — physics, not marketing. A cobot accelerates and decelerates gently with a 20 kg (44 lb) case to keep the load stable and the motion safe around people. Light cases in the 5–10 kg range cycle noticeably faster. Large cases also travel further per move and sometimes need reorientation, which adds time.

2. Travel distance and pallet pattern

The robot's path is pick → lift → travel → place → return. A compact cell with the pallet beside the conveyor end cycles faster than a wide pattern that spreads placements across a full pallet. Patterns that require rotating cases 90° add a wrist move to some placements. Serving two pallet positions from one fixed robot (left and right) is efficient; more positions need a linear rail or a second robot, which changes the math again.

3. The gripper: single-pick vs multi-pick

This is the biggest lever. A single-case gripper's rate is capped by the cycle math above. A multi-pick or layer-style gripper places several cases per trip and multiplies the effective rate without the robot moving any faster — the usual route when a line genuinely needs 15–20 cases per minute. The trade-off is gripper cost and less flexibility across very different case sizes.

4. The conveyor feed

A palletizer can only stack what arrives, properly spaced. If cases arrive bunched, touching, or with gaps that force the robot to wait, the cell's real rate is the conveyor's rate, not the robot's. Consistent infeed — cases presented one at a time, in the same orientation — is quiet, unglamorous, and worth several cases per minute.

Sustained vs peak: the question to ask every vendor

When a plant tells us their line runs "20 cases a minute," our next question is always: is that sustained, or is that the peak? Many lines hit a high rate for a few minutes during a surge but average far less across a shift once changeovers, film breaks, upstream hiccups, and pallet swaps are counted. Size the palletizer to your sustained rate with sensible headroom — not to the best five minutes your line ever had. Oversizing to a peak number pushes plants toward bigger, fenced, traditional palletizers they may not need; undersizing to an average with no headroom creates a bottleneck. This is also why a cobot palletizer for rent is a low-risk way to find out: the cell goes on your real line, with your real cases, and the rate you get is measured, not promised.

Typical rates by scenario

These ranges assume a well-fed conveyor and a standard 40" × 48" pallet pattern. Your cell design — gripper choice, layout, and infeed — decides where you land inside them.

How to measure your line before you buy anything

• Time three full pallets, not three good minutes. Cases stacked ÷ elapsed minutes, including pallet swaps, is your true sustained rate.
• Weigh your heaviest case and measure your master case (L × W × H). Weight and footprint drive both rate and whether a cobot fits at all — our cells handle cases up to 20 kg (44 lb).
• Count your patterns. One case size and one pattern is the fastest world; frequent changeovers argue for a flexible cobot over a fixed high-speed machine.
• Watch the infeed for an hour. If cases arrive bunched or skewed, fix presentation first — it is the cheapest rate increase available.