Air Gear Motor, Gast

Air Gear Motor
Gast Air GearMotor
Pneumatic Gearmotor
Known industry wide for their rugged construction and reliability, Gast Air Motors and air powered Gearmotors are available in both lubricated and oilless models.
These air motors and gearmotors are used in many industrial applications, from mixing equipment to running pump drives.
  • Self-sealing vanes take up their own wear, ensuring consistent output for thousands of hours of use
  • Variable speed capabilities allow flexibility and versatility in any number of applications 
  • Cool-running operation means air motors can be used in ambient temperatures of up to 250° F (120° C) 
  • Non-electrical operation reduces the possibility of explosion from igniting flammable gases
Pictured: typical rightangle, worm gear reducer.
A. Bearings
Ball bearings used on input shaft; tapered roller bearings used on output shaft.
B. Case
Fine close-grain cast iron; crankcase sealed; duplex-
milled for parallelism of mounting surfaces.
C. Worm
8620 alloy steel thread rolled to give uninterrupted grain pattern;  carburized and hardened after rolling; high- burnish contact surface from rolling reduces friction coefficient for less heat generation, lower power losses. In large sizes, worms are cut, hardened, and ground to a good micro-finish, providing the ultimate in efficiency and torque capacity.
D. Worm Gear
Forged bronze; geometry and high helix angle give maximum beam strength, high efficiency.
E. Cap Screw
High-strength fasteners with corresponding torque specifications prevent loosening or breaking.
F. Seals
Double-dipped and spring-loaded for leak proofing; tested to ensure compatibility with lubricant.

Air Gearmotors
Model
Operating Data
Max. Torque
Max.Speed
(rpm)
Line
Pressure
Output Power
(hp/kW)
Torque
(lb in/Nm)
Max. Air Consumption
cfm/m3/h
Max. Speed
(rpm)
lb.in
Nm
1AM-NRV
350
A
0.34/0,26
62/7,1
21/36
30
72
8,1
1UP-NRV
400
C
0.32/0,23
49/5,5
21/36
30
71
8,0
4AM-RV10:1 gear ratio
300
B
1.26/0,94
274/31
57.5/98
30
425
48
4AM-RV15:1 gear ratio
200
B
1.25/0,9
400/45,2
60/102
20
640
72
4AM-70C
20:1 gear ratio
150
A
1.17/0,87
487/55
71/120
15
740
83,6
4AM-70C
40:1 gear ratio
75
A
0/95/0,71
800/90,4
70/120
7
1255
141,8
4AM-70C
60:1 gear ratio
50
A
0.82/0,61
1040/117,5
71/120
5
1640
185,3
6AM-22A
10:1 gear ratio
300
A
3.4/2,54
720/81,4
130/221
30
950
107,4
6AM-22A
20:1 gear ratio
150
A
2.65/1,98
1100/124,3
130/221
15
1550
175,6
6AM-22A
40:1 gear ratio
75
A
2.1/1,57
1725/194,9
135/230
8
2550
282,5
8AM-32A
125
A
3.7/2,76
1850/209,1
177/301
15
2550
288,2
16AM-13
100
A
6.5/4,85
4175/471,8
275/468
15
5175
584,8
A – 100 psig & 7 bar line pressure for imperial and metric data respectively
B – 80 psig & 5,5 bar line pressure for imperial and metric data respectively
C – 60 psig & 4,1 bar line pressure for imperial and metric data respectively
More reasons why you should switch from electricity to air.
If you compare Gast Air-Powered Gearmotors with any electric-powered  Gearmotor, there’s really no comparison. Here’s why:
  • More horsepower.
  • Size for size, weight for weight, you can’t beat a Gast Gearmotor. A typical rotary vane air motor – the type used in gearmotors – developing 21 /2 hp (1,9 kW) at 1800 rpm and 90 psi (6,2 bar), weighs just 17 pounds (7,7 kg). A comparable electric motor may be two or three times heavier.
  • More speed control.
    • You can’t get more precise turning power than with a Gast Gearmotor. In applications where you need variable speed – like bolt tensioning equipment or rock drilling rigs – one-speed electric motors just won’t fit the bill. Precise lifting, lowering, or turning is simple with Gast Gearmotors.
  • More flexibility.
    • More than most standard electric-powered gear reducers can provide. Gast Gearmotors give you infinitely variable turning power from 73 to 5200 lb. in. (8 to 587 Nm) of torque. And Gast Gearmotors are instantly reversible through easy valving in the air line.
  • More configurations.
    • That makes it easier for our product to work in your product. Our gearmotors are available in four mounting configurations.
  • More life.
    • Unlike electric-powered gearmotors, there’s no chance of burnout with a Gast Gearmotor. They can be stalled indefinitely with no heat buildup. They’re nonelectrical sparking, too, which makes them ideal for use in potentially explosive environments – places where you couldn’t even consider electricity
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