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Specifications
Specifications at 90 psig (6.2 bar, 620 kPa)
Air Pressure, Working ................90psig (620 kPa)
Free Running Speed ............................... 275 RPM
Air Consumption, Freespeed .. 4.5 CFM (32 SCFM)
Air Inlet Thread Size ......................... 1/4"–18 NPT
Air Supply Hose Size ........... 3/8" ID min (9.5 mm)
Square Drive Size ...........................................3/8"
Length ......................................11.8" (299.7 mm)
Weight ......................................3.0 lbs (1360.8 g)
Torque Range ......................5-70 ft.lb. (7-95 N•m)
Max Air Supply Hose Length ................ 30' (10 m)
Noise* (Tested in accordance with ISO 15744)
Sound Pressure Level (A) ................ 92.9 dB
Uncertainty, K .................................... 4.1 dB
Sound Power Level (A) ...................104.5 dB
Uncertainty, K .................................... 4.1 dB
Vibration* (Tested in accordance with ISO 28927)
Vibration Level ........................... .. 6.77 m/s
Uncertainty, K ................................0.71 m/s
*These declared values were obtained by
laboratory type testing with the stated standards
and are not adequate for use in risk assessments.
Values measured in individual work places may be
higher. Values and risk of harm experienced by an
individual user are unique and depend upon the
environment and manner in which the user works,
the work piece and the workstation design, as well
as upon the exposure time and the physical
condition of the user.
Snap-on disclaims liability for the consequences of
using the declared values, instead of values
reflecting the actual exposure determined in an
individual risk assessment in a work place situation
over which we have no control.
Applications
Snap-on PTR72 Air Ratchet is a rugged, variable speed,
reversible air ratchet that is ideal for many confined
automotive and industrial applications.
It is designed and built to make fast work of light duty
fastener turning jobs that do not require more than 70
ft.lb. (95 N•m) torque.
ZPTR72CE Rev. C
Air Supply
Air tools operate best on clean, moisture-free, well-
lubricated air at a constant pressure of 90 psig (6.2 bar,
620 kPa) maximum.
A – Receiver Tank, Minimum 40 Gallon
(151.5 liters)
B – Compressor, Sufficient Capacity
C – Drain, Daily
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D – Pipe and Fittings, Minimum 1/2"
2
E – Top Air Intake
F – Shut Off Valve, Easily Reached
G – Filter
H – Air Regulator, Set at Working Pressure
I – Lubricator
J – Air Tool Connection
K – Low Spot, Water Trap
L – Drain, Daily
Piping System
The piping system should be large enough to avoid an
excessive pressure drop under maximum flow
conditions. All pipe fittings and hose outlets should be
1/2" and should be arranged so there are no low spots
that collect water which cannot be drained daily. Do not
use an air hose less than 3/8" ID or one that is too long
because pressure drop under maximum flow conditions
could reduce performance.
✓
Accessories
connections. The quick coupler, Snap-on part
number AHC21, and adaptor, Snap-on part
number AHC21M are recommended for use with
this air tool.
Air Compressor
The air compressor should have sufficient capacity to
deliver 4.5 CFM (32 SCFM) at 90 psig (6.2 bar,
620 kPa) at each outlet while the tool is running. The
receiver tank should have sufficient capacity to provide
surge balance for each air tool.
Filter
The Snap-on AHR424 Filter, or equivalent, should be
used to assure clean air for the tool. Water, dirt and scale
act as abrasives which could damage the air tool. A filter
unit should be installed between the compressor and the
air regulator and air lubricator.
4
Figure 1: Air Supply
are
available
for
air
tight
(02/20)
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