What is the conveyor speed formula?

Conveyor Speed equals Parts per Minute times Part Pitch. Parts per Minute is your required rate, and Part Pitch is center-to-center spacing between consecutive parts. For 400 parts per hour, parts per minute is 400 / 60 = 6.67; at 18-inch pitch, speed is 6.67 x 18 = 120 inches per minute. Divide by 12 to get 10 feet per minute.

How do I set conveyor speed to hit a parts-per-hour target?

Convert the target to parts per minute, then multiply by pitch. For 400 parts per hour at 18-inch spacing: 400 / 60 = 6.67 parts per minute, times 18 = 120 inches per minute, or 10 feet per minute. Set the drive to that value and confirm actual belt speed with a tachometer, since drive setpoint and true surface speed can differ.

What is part pitch and why not use part length?

Part pitch is center-to-center spacing between consecutive parts and includes the gap between them; part length is just the part itself. A 6-inch part on 18-inch pitch has a 12-inch gap. Using the 6-inch length sets the belt to 6.67 x 6 = 40 inches per minute instead of 120, three times too slow, causing parts to accumulate or the line to starve downstream.

How do I convert conveyor speed from inches per minute to feet per minute?

Divide inches per minute by 12. The formula gives 120 inches per minute for 400 parts per hour at 18-inch pitch, so 120 / 12 = 10 feet per minute. For metric, if pitch is in millimeters the speed comes out in mm per minute; divide by 1000 for meters per minute. Keep pitch and output units matched before converting.

How can I increase throughput without speeding up the conveyor?

Reduce the part pitch. At a fixed 10 feet per minute (120 inches per minute), 18-inch pitch yields 120 / 18 = 6.67 parts per minute, or 400 per hour. Tighten pitch to 12 inches and you get 120 / 12 = 10 parts per minute, which is 600 per hour, a 50 percent gain. Just confirm downstream stations can absorb the tighter spacing.

What is the difference between conveyor speed and throughput rate?

Throughput rate is parts per unit time, like 400 parts per hour; conveyor speed is a linear velocity, like 10 feet per minute. Pitch links them: speed equals parts per minute times pitch. Two lines can share 10 feet per minute yet have different throughput if their pitches differ. Set the rate as the requirement, then compute the belt speed that pitch demands.

Production and Throughput

Conveyor Speed Formula

Conveyor speed links throughput rate to part spacing on a moving belt or chain line. Use it when setting belt speed to hit a parts-per-hour target or checking whether a change in part pitch affects capacity.

Formula

Conveyor Speed = Parts per Minute x Part Pitch

Variables

Parts per Minute: Required throughput rate expressed in parts per minute
Part Pitch: Center-to-center spacing between consecutive parts on the conveyor, in inches or mm

Understanding the Conveyor Speed Formula

Conveyor speed converts a required output rate into a belt or chain velocity by tying it to how far apart parts sit. Speed equals Parts per Minute times Part Pitch, because each minute the belt must advance one full pitch for every part that passes. On the floor this sets the drive so the line delivers parts on time without gaps or pileups. For 400 parts per hour at 18-inch pitch, that is 6.67 x 18 = 120 inches per minute, or 10 feet per minute.

Convert the demand rate to parts per minute first: 400 per hour divided by 60 is 6.67. Measure Part Pitch center-to-center, including the gap between parts, in the same length unit you want the answer in. The result comes out in inches per minute here, then divide by 12 to reach 10 feet per minute. The classic mistake is plugging in physical part length instead of pitch; that ignores the gap and sets the belt too slow, causing accumulation.

Sanity-check the speed against the drive's capability and downstream handling. Ten feet per minute is a slow indexing pace suited to assembly; a packaging line may need far higher. If output falls short, either the belt runs under the computed speed or pitch drifted, so parts crowd or gap. To raise capacity without speeding the belt, tighten pitch: cutting 18 inches to 12 at the same 10 feet per minute lifts output from 400 to 600 parts per hour.

Worked Example

A line needs to run 400 parts per hour with parts spaced 18 inches apart.

Parts per minute = 400 / 60 = 6.67
Conveyor speed = 6.67 x 18 = 120 inches per minute
Converted = 120 / 12 = 10 feet per minute

Result: 10 feet per minute

Common Mistake

Using physical part length instead of center-to-center pitch. Pitch includes the gap between parts. Using only part length will set the belt too slow and cause accumulation or gaps in the line.

Frequently Asked Questions

What is the conveyor speed formula?: Conveyor Speed equals Parts per Minute times Part Pitch. Parts per Minute is your required rate, and Part Pitch is center-to-center spacing between consecutive parts. For 400 parts per hour, parts per minute is 400 / 60 = 6.67; at 18-inch pitch, speed is 6.67 x 18 = 120 inches per minute. Divide by 12 to get 10 feet per minute.
How do I set conveyor speed to hit a parts-per-hour target?: Convert the target to parts per minute, then multiply by pitch. For 400 parts per hour at 18-inch spacing: 400 / 60 = 6.67 parts per minute, times 18 = 120 inches per minute, or 10 feet per minute. Set the drive to that value and confirm actual belt speed with a tachometer, since drive setpoint and true surface speed can differ.
What is part pitch and why not use part length?: Part pitch is center-to-center spacing between consecutive parts and includes the gap between them; part length is just the part itself. A 6-inch part on 18-inch pitch has a 12-inch gap. Using the 6-inch length sets the belt to 6.67 x 6 = 40 inches per minute instead of 120, three times too slow, causing parts to accumulate or the line to starve downstream.
How do I convert conveyor speed from inches per minute to feet per minute?: Divide inches per minute by 12. The formula gives 120 inches per minute for 400 parts per hour at 18-inch pitch, so 120 / 12 = 10 feet per minute. For metric, if pitch is in millimeters the speed comes out in mm per minute; divide by 1000 for meters per minute. Keep pitch and output units matched before converting.
How can I increase throughput without speeding up the conveyor?: Reduce the part pitch. At a fixed 10 feet per minute (120 inches per minute), 18-inch pitch yields 120 / 18 = 6.67 parts per minute, or 400 per hour. Tighten pitch to 12 inches and you get 120 / 12 = 10 parts per minute, which is 600 per hour, a 50 percent gain. Just confirm downstream stations can absorb the tighter spacing.
What is the difference between conveyor speed and throughput rate?: Throughput rate is parts per unit time, like 400 parts per hour; conveyor speed is a linear velocity, like 10 feet per minute. Pitch links them: speed equals parts per minute times pitch. Two lines can share 10 feet per minute yet have different throughput if their pitches differ. Set the rate as the requirement, then compute the belt speed that pitch demands.