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Makita

MAC320Q
air-supply check.

Three-gallon Quiet Series model with two couplers and 2.6 CFM at 90 PSI. It offers more reserve/output than the smaller Quiet models but retains their use restriction.

3 GAL

Published specifications

Delivered airflow
3.5 CFM at 40 PSI; 2.6 CFM at 90 PSI
Tank
3 US gal
Maximum pressure
135 PSI
Duty share
50% — see definition
Duty definition
No more than 50% compressor pumping time within each hour (owner manual).
Power
120 V · 60 Hz
Published current
8.5 A — Product-page AMPS field; running/startup basis not specified.
Published sound
60 dB
Sound conditions
Measurement distance and method not specified in consulted manufacturer sources.
Weight
52.5 lb
Machine dimensions
18 × 19 × 13.75 in (L,W,H)
Pump type
oil-free
CHECK THE PAIRING

Your tool. Your working schedule.

Example schedule: 10 trigger seconds each minute. Change it to reflect your job.

Your setup

Session length is recorded for checking the manual. It does not predict a safe operating time.

Add confirmed missing specifications

Use figures from your exact model’s label or manual. These entries remain user supplied and are not added to our catalog.

Makita MAC320Q

Outside stated application

The manufacturer application limit is a deciding constraint for this pairing. Airflow arithmetic does not override it.

Your average air demand3.67 CFM10 seconds of trigger time per minute · 1 tool · 30-minute session
Published compressor delivery2.60 CFMAt 90.0 PSI

  1. Manufacturer application limits

    Does not meet this criterion

    The captured manufacturer guidance limits this compressor to nailer / stapler applications. This tool is categorized as impact-wrench. A favorable airflow calculation does not override that restriction.

  2. Working pressure

    Within this criterion

    The tool’s 90 PSI requirement is within the compressor’s 135 PSI pressure ceiling. This does not establish pressure delivered through the regulator, hose and fittings.

  3. Air demand versus published delivery

    Does not meet this criterion

    This schedule requires 3.67 CFM on average, above 2.6 CFM published at 90 PSI. A larger tank alone does not close the ongoing air-supply deficit.

  4. Airflow during a trigger pull

    Check the conditions

    While the trigger is held, 22 CFM exceeds the 2.6 CFM delivery rating. Stored air may help a short burst, but pressure-switch behavior, burst length and losses have not been simulated.

  5. Pump duty

    Check the conditions

    A simplified air balance implies 141.03% pump-on time; the recorded duty share is 50%. The estimated requirement exceeds that share. No more than 50% compressor pumping time within each hour (owner manual). This is not a measured cycle or a continuous-use approval.

  6. Session duration

    Check the conditions

    30 minutes is recorded for your planned session. Model-specific duration limits, cooling breaks and actual cycling are not automatically validated. This field does not change the airflow calculation.

  7. Hose and connections

    Check the conditions

    The tool specifies a minimum 0.38-inch hose inside diameter; its recorded air inlet is 0.25 inch. Confirm thread type, coupler profile, hose length and available flow separately; matching nominal sizes alone is not a connection check.

Calculation details

141% estimated pump-on share from average demand ÷ rated delivery. This is an air-balance estimate, not an observed duty cycle or permission to run continuously.

2.2 seconds of theoretical stored-air drawdown over 120 → 90 PSI, with the pump off and a continuous trigger pull. This is not actual operating time, recharge time, or storage life.

Specification screening only. Actual pressure at the tool, hose losses, pump cycling and installation conditions are not established by an average-flow calculation.

231C manufacturer specification table ↗ · Official US product specifications ↗

Reading the result for this model

The MAC320Q publishes 2.6 CFM at 90 PSI. The matcher compares a repeating trigger schedule with a delivery point at the tool’s confirmed pressure. A passing average-flow check does not establish outlet pressure throughout a burst.

Tank volume affects the amount of air stored between two pressures; it does not change the published pump delivery. Review the optional buffer estimate separately from duty and session limits.

Manufacturer sources

Checked 25 October 2026. Specifications can change; verify the exact model and market before purchase.

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