How fast can operators hand-load an overhead conveyor?

Cardinal Conveyor's layout guide puts manual loading and unloading at 10 to 25 ft/min. Use the top of that range as your maximum chain speed unless a time study at your load station says otherwise.

How do I get loaded carriers needed per hour from parts per hour?

Divide parts needed per hour by the parts hung on each carrier. At 1,680 parts an hour and 4 parts per carrier, you need 420 loaded carriers an hour.

Does a tighter pitch give the load crew less time per carrier?

No: time between carriers depends only on the carrier rate. A tighter pitch slows the chain, so each carrier spends longer passing through the load zone, but carriers arrive no more often.

Why do empty carriers raise the chain speed?

Every empty carrier still uses a pitch of chain. With 90% of carriers leaving loaded, the chain must present about 11% more carriers, and run about 11% faster, than with every carrier loaded.

Conveyors calculator

Carrier Spacing Conveyor Speed Calculator

Find the chain speed that delivers your loaded carriers per hour at a fixed pitch, and the pitch range that fits your speed limit. You need the rate, loaded share, uptime, pitch, minimum pitch and maximum speed.

What this calculator does

Chain speed an overhead or power-and-free line needs at your carrier pitch, checked against your speed limit and minimum pitch.

Formula used

Carriers presented per running hour = loaded carriers needed ÷ (carriers leaving loaded % ÷ 100) ÷ (uptime % ÷ 100)
Required chain speed (ft/min) = carriers presented × carrier pitch (in) ÷ 720; 720 = 12 in/ft × 60 min/hr
Chain speed at minimum pitch = carriers presented × minimum carrier pitch ÷ 720; widest pitch = maximum chain speed × 720 ÷ carriers presented
Time between carriers (sec) = 3,600 ÷ carriers presented

Inputs explained

Loaded Carriers Needed per Hour: Parts needed per hour ÷ parts hung per carrier.
Carrier Pitch: Center to center of carriers along the chain.
Carriers Leaving Loaded: Loaded carriers ÷ carriers passing the load station, from a shift count.
Uptime: Run time ÷ scheduled time for the chain, from downtime logs.
Minimum Carrier Pitch: Tightest pitch where loads clear on your curves, from the layout.
Maximum Chain Speed: Top speed allowed by the drive, oven dwell or load crew.

How to use the result

Best suited to setting chain speed on a new paint line, changing carrier pitch for a larger part.
Minimum pitch must come from the layout: loads swing and close up on horizontal and vertical curves. Power-and-free zones can run other speeds and spacings; check each zone with its own numbers.

Current U.S. benchmarks

The U.S. has 21,668 machinery manufacturing establishments employing about 1,086,146 workers (Census County Business Patterns, 2023).

Common questions

How fast can operators hand-load an overhead conveyor? Cardinal Conveyor's layout guide puts manual loading and unloading at 10 to 25 ft/min. Use the top of that range as your maximum chain speed unless a time study at your load station says otherwise.
How do I get loaded carriers needed per hour from parts per hour? Divide parts needed per hour by the parts hung on each carrier. At 1,680 parts an hour and 4 parts per carrier, you need 420 loaded carriers an hour.
Does a tighter pitch give the load crew less time per carrier? No: time between carriers depends only on the carrier rate. A tighter pitch slows the chain, so each carrier spends longer passing through the load zone, but carriers arrive no more often.
Why do empty carriers raise the chain speed? Every empty carrier still uses a pitch of chain. With 90% of carriers leaving loaded, the chain must present about 11% more carriers, and run about 11% faster, than with every carrier loaded.

Last reviewed 2026-10-01.