How do you calculate rivet cycle time?

Divide rivets to set by accepted rivets per hour for base time, then multiply by one plus the allowance. For 1800 rivets at 420/hr with a 10% allowance, base time is 4.29 hr and required time is 4.71 hr.

What does 'accepted' rivets per hour mean?

It's the rate of good, inspection-passing rivets — not raw squeezes. Defective sets that get drilled out and replaced don't count toward accepted throughput, which is why this rate is lower than a stopwatch on a perfect operator.

What is a good rivets-per-hour rate?

It varies hugely by method and access. Hand-squeezed solid rivets in open access run faster than buck-and-bar work in confined aircraft structure. The 420/hr default suits steady, accessible production; validate yours from your own logged accepted counts.

Base riveting time vs required riveting time?

Base time (4.29 hr here) assumes uninterrupted setting at the accepted rate. Required time (4.71 hr) adds the 10% allowance for handling, gauging, and rework, and is the number you should staff and quote against.

How much rework allowance should I use?

Start around 10% for mature processes and good access. Raise it for thin or layered stack-ups, blind rivets in tight spots, or new operators where drill-outs are more frequent. Track your actual drill-out rate and tune the allowance to it.

Why is my real riveting slower than the calculated time?

Usually access and rivet variety. A single average rate hides hard-to-reach fasteners, tool changes between rivet sizes, and ergonomic fatigue. If reality lags, either lower the accepted rate or raise the allowance to reflect those losses.

Fastening, Torque & Joint Assembly calculator

Rivet Cycle Time Calculator

Rivet cycle time is the labor hours a fastening or sheet-metal assembly job needs to set a given count of rivets, including the handling, inspection, and rework that real production demands. Assembly planners, aerospace and structural fabricators, and estimators use it to staff riveting stations, schedule build sequences, and price jobs that may involve thousands of fasteners. It matters because riveting is often the rate-limiting step in panel and frame assembly, and an optimistic rate quote turns into missed delivery dates. This calculator splits the ideal base riveting time from the allowance-padded hours you should actually book against the job.

What this calculator does

Estimate riveting operation hours from rivets to set, accepted rivets per hour, and allowance for handling, checks, and rework.
Use it when scheduling blind rivets, solid rivets, self-piercing rivets, or orbital riveting in assembly production.
It computes the labor hours to set a quantity of rivets at an accepted-rivets-per-hour rate, padded by a handling, check, and rework allowance.

Formula used

Base riveting time = rivets to set ÷ accepted rivets set per hour
Required riveting time = base time × handling/check allowance factor

Inputs explained

Rivets to set: Count rivets required for the assembly or lot, including planned samples if they consume station time.
Accepted rivets set per hour: Use a measured rate for the rivet type, access, operator method, and tool used.
Handling, check, and rework allowance: Add time for hole alignment, tool approach, mandrel disposal, set checks, and drill-out or rework.

How to use the result

Use it when estimating a riveting job, staffing a station, or sequencing assembly where riveting drives the schedule.
It uses a single average rate; mixed rivet types, hard-access locations, or fixturing changes within a job can swing the real rate well above or below the input.

Current U.S. benchmarks

Manufacturing hourly earnings average $30.27 (BLS, Jun 2026), up 4.4% from a year earlier. Median machinist pay is $28.24/hr (OEWS 2025), with state medians on each state page. Manufacturers have 529k open positions nationally (BLS JOLTS).

Common questions

How do you calculate rivet cycle time? Divide rivets to set by accepted rivets per hour for base time, then multiply by one plus the allowance. For 1800 rivets at 420/hr with a 10% allowance, base time is 4.29 hr and required time is 4.71 hr.
What does 'accepted' rivets per hour mean? It's the rate of good, inspection-passing rivets — not raw squeezes. Defective sets that get drilled out and replaced don't count toward accepted throughput, which is why this rate is lower than a stopwatch on a perfect operator.
What is a good rivets-per-hour rate? It varies hugely by method and access. Hand-squeezed solid rivets in open access run faster than buck-and-bar work in confined aircraft structure. The 420/hr default suits steady, accessible production; validate yours from your own logged accepted counts.
Base riveting time vs required riveting time? Base time (4.29 hr here) assumes uninterrupted setting at the accepted rate. Required time (4.71 hr) adds the 10% allowance for handling, gauging, and rework, and is the number you should staff and quote against.
How much rework allowance should I use? Start around 10% for mature processes and good access. Raise it for thin or layered stack-ups, blind rivets in tight spots, or new operators where drill-outs are more frequent. Track your actual drill-out rate and tune the allowance to it.

Last reviewed 2026-05-12.