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(320) 796-0851

Castair

Castair

  • Compressors
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Formulas / Air Tool Comsumption Guide

Air Receiver Capacity

(Ft3 of free air at various pressures)

Receiver (gal.) Pressure (PSI)
0 75 100 125 150 175 200 250
30 4.0 20.5 27.3 34.2 41.0 47.0 54.7 68.3
60 8.0 41.0 54.7 68.3 82.0 96.0 109.4 136.7
80 10.7 54.7 73.0 91.2 109.4 128.0 146.0 182.4
120 16.1 82.0 109.3 136.7 164.0 190.0 218.7 273.3
200 26.8 136.7 182.2 227.8 273.4 319.0 364.5 455.6
240 32.2 164.0 218.7 273.4 328.0 383.0 437.4 546.7
400 53.6 273.4 364.5 455.6 546.7 637.0 729.0 911.2
660 88.4 451.0 601.4 751.7 902.1 1052.0 1202.8 1503.4
1060 142.0 724.4 965.9 1207.3 1448.8 1690.0 1931.7 2414.5
1600 214.4 1093.4 1457.9 1822.4 2186.9 2551.0 2915.8 3644.8

Capacities at other pressures are exactly in proportion. Example: At 200 lbs. pressure the capacity of a given size tank is exactly double the capacity at 100 lbs. pressure.


Air Tool Consumption Guide

These tools are rated based upon typical on load performance. Always check tool manufacturers’ specifications. This chart is based on averages and should not be considered accurate for any Particular brand of tool.

Tool Description Operating PSI Use factor CFM consumption
3/8” air ratchet 90 25% 2.5
1/2” air ratchet 90 25% 4
1/4” impact wrench 90 25% 4
3/8” impact wrench 90 25% 5
1/2” impact wrench 90 25% 8
3/4” impact wrench 90 25% 9
1” impact wrench 90 25% 11
1-1/4” impact wrench 90 25% 14
Air hammer 90 25% 3
6” dual action sander 90 100% 12
Inline body file 90 100% 18
6” grinder 90 100% 18
Body buffer 90 100% 18
Die grinder 90 100% 16
Cut off wheel 90 100% 16
Rivet gun 90 16 rivets 4
Roofing nail gun 90 16 nails 1.3
Finish nail gun 90 16 nails 1.3
Framing nail gun 90 16 nails 2.2
Paint Gun (touch up) 90 50% 4
Paint Gun (production 90 50% 8

Table Conversion Chart

(Minutes to Decimal Hours)

Minutes Decimal Hours Minutes Decimal Hours Minutes Decimal Hours
1 .02 21 .35 41 .68
2 .03 22 .37 42 .70
3 .05 23 .38 43 .72
4 .07 24 .40 44 .73
5 .08 25 .42 45 .75
6 .10 26 .43 46 .77
7 .12 27 .45 47 .78
8 .13 28 .47 48 .80
9 .15 29 .48 49 .82
10 .17 30 .50 50 .83
11 .18 31 .52 51 .85
12 .20 32 .53 52 .87
13 .22 33 .55 53 .88
14 .23 34 .57 54 .90
15 .25 35 .58 55 .92
16 .27 36 .60 56 .93
17 .28 37 .62 57 .95
18 .30 38 .63 58 .97
19 .32 39 .65 59 .98
20 .33 40 .67 60 1.0

Useful Formulas:

FormulaTo Find
Motor pulley O.D. * motor RPM /
Pump RPM Pump flywheel O.D.
=Pump RPM
Pump flywheel O.D. X pump RPM /
Motor RPM
=Motor Pulley O.D.
Pump flywheel O.D. X pump RPM /
Motor Pulley O.D.
=Motor RPM

Air Compressor Sizing Guide- CFM Per Employee

Application Piston Rotary
Auto Mechanic 6 4
Truck Mechanic 9 6
Body Shop 12 8

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Phone: (320) 796-0851
Fax: (320) 796-0854
Email: castair@tds.net
Hours: 8:00-5:00pm Monday - Friday
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