How do you calculate pultrusion pull speed?

Divide the linear footage pulled by the machine running hours to get raw speed, then multiply by line efficiency. With 1,200 ft over 8 hours the raw rate is 150 ft/min-equivalent throughput, and at 90% efficiency the effective throughput is 135 ft/min.

What is a good pull speed for pultrusion?

It depends on the resin system and wall thickness. Polyester and vinyl ester profiles commonly run 1 to 5 ft/min for solid sections, while thin fiberglass rod can exceed 10 ft/min. Epoxy and thick structural shapes run slower because the exotherm and cure need more dwell in the die.

Why is my effective pull speed lower than the raw rate?

Raw speed assumes the line ran continuously. Effective speed applies your efficiency factor to account for die stops, resin bath top-offs, and startup scrap. Here 90% efficiency drops 150 down to 135 ft/min, a realistic planning number.

What limits how fast you can pull a pultruded profile?

Cure kinetics in the die are the ceiling. Pull faster than the resin can gel and cross-link and the part exits soft or blisters. Die temperature zones, resin catalyst level, and part cross-section all set the maximum safe speed.

Should I quote customers using raw or effective pull speed?

Use effective throughput. Raw speed overstates capacity because it ignores the stops and scrap that every line experiences. Quoting the 135 ft/min effective figure instead of 150 protects your delivery dates.

How does efficiency affect daily output?

Linearly. At 150 ft/min raw over an 8-hour shift you would theoretically make 72,000 ft, but at 90% efficiency you net about 64,800 ft. Every point of efficiency is roughly 720 ft per shift on this line.

Pultrusion & Continuous Composite Profiles calculator

Pull Speed Calculator

Pull speed is the linear rate at which a pultrusion machine draws impregnated reinforcement through the heated forming die, and it governs everything downstream: cure state, surface finish, and output. Process engineers and line operators tune it against resin gel time and die temperature so the profile exits fully cured but not scorched. This calculator converts a shift's completed footage into raw pull speed, then discounts for line efficiency to give the effective ft/min you can actually plan around. That effective number is what belongs in a capacity model or a customer quote.

What this calculator does

Pull speed is the linear rate at which a pultrusion machine draws impregnated reinforcement through the heated forming die, and it governs everything downstream: cure state, surface finish, and output.
Use it when pull speed in pultrusion and continuous composite profiles is being committed and you need a throughput number you can defend.
It computes effective and raw pull speed in ft/min from the footage pulled in a shift, the machine's running hours, and a line efficiency percentage.

Formula used

Raw pull speed = completed output ÷ runtime
Effective pull speed = raw throughput × efficiency

Inputs explained

Linear feet of profile pulled per shift:
Machine running hours in the shift:
Line efficiency (uptime after gel/cure holds):

How to use the result

Use it when validating a new profile's line rate, sizing a production order against available shift hours, or comparing planned versus actual output on a running die.
It reports an average rate over the shift and cannot capture in-cycle slowdowns for resin change, die cleaning, or off-spec sections that were pulled but scrapped.

Current U.S. benchmarks

The producer price index for plastic resins and materials stands at 319.371 (BLS, May 2026), up 19.5% from a year earlier. Quotes priced off last quarter's material cost miss this move.

Common questions

How do you calculate pultrusion pull speed? Divide the linear footage pulled by the machine running hours to get raw speed, then multiply by line efficiency. With 1,200 ft over 8 hours the raw rate is 150 ft/min-equivalent throughput, and at 90% efficiency the effective throughput is 135 ft/min.
What is a good pull speed for pultrusion? It depends on the resin system and wall thickness. Polyester and vinyl ester profiles commonly run 1 to 5 ft/min for solid sections, while thin fiberglass rod can exceed 10 ft/min. Epoxy and thick structural shapes run slower because the exotherm and cure need more dwell in the die.
Why is my effective pull speed lower than the raw rate? Raw speed assumes the line ran continuously. Effective speed applies your efficiency factor to account for die stops, resin bath top-offs, and startup scrap. Here 90% efficiency drops 150 down to 135 ft/min, a realistic planning number.
What limits how fast you can pull a pultruded profile? Cure kinetics in the die are the ceiling. Pull faster than the resin can gel and cross-link and the part exits soft or blisters. Die temperature zones, resin catalyst level, and part cross-section all set the maximum safe speed.
Should I quote customers using raw or effective pull speed? Use effective throughput. Raw speed overstates capacity because it ignores the stops and scrap that every line experiences. Quoting the 135 ft/min effective figure instead of 150 protects your delivery dates.

Last reviewed 2026-05-12.