Norgren M/31121 Air Bellow - 12in, 100mm Stroke
Part Number: M/31121
Quick Summary
Norgren M/31121 Air Bellow provides frictionless pneumatic actuation for high-force, short-stroke applications. Engineers often face lubrication-driven contamination, wear, and downtime with traditional cylinders; this single-acting unit minimizes maintenance while delivering reliable performance. Certification notes vary, but expect CE conformity and IP-related protection in the control environment, with SIL compatibility when safety interlocks are used. Engineered for quick install via standard mounting and a G1/2 port, it pairs with IMI Norgren systems for consistent cycle times and lower total cost of ownership. The design supports vibration isolation and non-magnetic compatibility, enabling precise control in demanding automation lines. With a robust 38.85 kN theoretical force, it handles short-stroke, high-load tasks efficiently.
Product Information
Extended Description
M/31121 Norgren: Frictionless operation | No maintenance or lubrication | Ideal for short stroke, high-force applications | High vibration isolation level | Simple to install
Medium
Compressed air
Operating Temperature
-40 ... 70 °C, -40 ... 158 °F
Operating Pressure
0 ... 8 bar, 0 ... 116 psi
Port Size
G1/2
Nominal Diameter
12"
Number Of Convolutions
1
Stroke Length
100 mm, 4"
Operation
Single acting
Magnetic/Non-magnetic
Non-magnetic
Theoretical Force
38850 N
Dimensions - Height
480 mm
Dimensions - Length
270 mm
Dimensions - Width
270 mm
Weight
5.4 kg
Country of Origin
Germany
Range
M/31000
Brand
IMI Norgren
Frictionless operation minimizes frictional losses in every cycle, delivering smoother motion and reduced wear for longer component life and lower energy consumption in high-speed lines. This translates to lower maintenance costs and less lubricant-related contamination in your pneumatic system, especially in cleanroom or food-grade environments. The single-acting design simplifies control logic and reduces footprint, enabling compact installations in cramped automation cells while maintaining strong closing and acting force. A no-lou brication requirement and robust non-magnetic construction improve reliability in vibration-prone assemblies, reducing downtime and extending service intervals. Standard G1/2 porting and the 12" diameter with a 100 mm stroke provide predictable actuation for high-load tasks, supporting quick line changeovers and easier field servicing. Long-tail keywords: air bellow cylinder, pneumatic actuator, 12 inch bellows, short stroke actuator, vibration isolation pneumatics, non-magnetic pneumatic cylinder.
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FAQs
Install the unit on a rigid, flat surface and align the load path with the piston to avoid side loads. Connect compressed air via a standard G1/2 port fitting and use appropriate mounting hardware for the 12 inch diameter, 100 mm stroke. Securely fasten the cylinder and verify there is no bind or pinch during operation.
Key specs include a 12 inch nominal diameter, 100 mm stroke, single acting movement, compressed air medium, operating temperature range -40 to 70 °C, operating pressure 0 to 8 bar, port size G1/2, non-magnetic construction, and a theoretical force around 38.85 kN. Overall dimensions are 270 mm length, 270 mm width, 480 mm height, with a weight of 5.4 kg.
Yes. The M/31121 features high vibration isolation and frictionless operation, reducing transmitted vibrations and wear in demanding lines. Its non-magnetic construction helps maintain precision in sensitive measurement setups, while the single-acting design simplifies mounting and reduces potential misalignment. Proper mounting and enclosure compatibility further enhance performance in vibration-prone environments.
Certification details are manufacturer-specific. In practice, look for CE conformity and IP-related protection in the control environment, with SIL compatibility depending on system safety requirements. Always verify the exact certifications from the datasheet and CAD resources listed in the product downloads to ensure regulatory alignment for your region and application.
Maintenance is reduced due to no lubrication requirements, which lowers operating costs and contamination risk. The frictionless operation and robust build improve uptime, while easy installation shortens line changes. Combined with strong short-stroke, high-load capabilities, this results in faster return on investment through improved throughput and lower total cost of ownership.