Norgren PM/31081 Air Bellow - 8 in diameter, 95 mm stroke
Part Number: PM/31081
Quick Summary
PM/31081 air bellow is a frictionless, single-acting actuator designed for compact pneumatic applications. Operators often contend with maintenance-heavy actuators that require lubrication and frequent adjustment in short-stroke, high-force tasks. While the data sheet highlights high-force performance and a robust aluminium body, verify exact certifications such as CE marking and IP ratings, and consider SIL safety considerations where applicable. This product aims to reduce downtime and lifecycle costs by delivering reliable, maintenance-free actuation in automation lines. By combining robust construction with straightforward installation, it supports consistent performance in demanding manufacturing environments while easing procurement and integration for your teams.
Product Information
Extended Description
PM/31081 Norgren: Frictionless operation | No maintenance or lubrication | Ideal for short stroke, high-force applications | High vibration isolation level | Easy, compact installation
Medium
Compressed air
Operating Temperature
-30 ... 50 °C, -22 ... 122 °F
Operating Pressure
0 ... 8 bar, 0 ... 116 psi
Port Size
G3/4
Nominal Diameter
8"
Number Of Convolutions
1
Stroke Length
95 mm
Operation
Single acting
Magnetic/Non-magnetic
Non-magnetic
Theoretical Force
16300 N
Materials - Body
Aluminium
Dimensions - Height
225 mm
Dimensions - Length
55 mm
Dimensions - Width
225 mm
Weight
1.8 kg
Country of Origin
Germany
Range
PM/31000
Brand
IMI Norgren
Feature Frictionless operation → Business Impact Minimizes wear and eliminates lubrication needs, delivering lower lifecycle costs and reduced maintenance windows. Application High-cycle clamping and lifting in tight spaces. Feature No lubrication requirement → Business Impact Simplifies upkeep and improves predictability under harsh duty cycles. Application Suitable for continuous actuation in automated lines without regular re-lubrication. Feature Compact, 8 in diameter with 95 mm stroke → Business Impact Enables high-force actuation in a small footprint, reducing machinery enclosure size. Application Ideal for tight automation cells and compact tooling stations. Feature High vibration isolation → Business Impact Improves stability and repeatability in nearby conveyors and robotic modules. Application Used in environments with significant vibration to maintain consistent performance. Feature Aluminium non-magnetic body → Business Impact Combines light weight with corrosion resistance and minimal magnetic interference. Application Supports clean assembly in mixed-material lines and EMI-sensitive setups. Feature Port size G3/4 → Business Impact Enables standard, compatible compressed-air plumbing, reducing integration time. Application Simplifies system design with common supply lines. Feature Theoretical force 16300 N at 0–8 bar → Business Impact Delivers authoritative load capacity for short-stroke actuation, lowering the need for parallel actuators. Application Useful in clamping, pressing, and quick-load transfer tasks. Feature Weight 1.8 kg and precise dimensions → Business Impact Facilitates easy mounting and predictable enclosure fitment. Application Streamlines installation in compact machines and retrofit projects. Feature Range PM/31000 and non-magnetic construction → Business Impact Ensures consistency across product families and compatibility with non-magnetic environments. Application Supports scalable automation architectures across multiple stations.
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FAQs
PM/31081 requires proper mounting alignment to avoid side loads, with a G3/4 port for standard compressed air connections. Ensure a rigid support surface for the 1-part, single-acting cylinder and check that the 95 mm stroke is appropriate for the available travel. Use suitable mounting brackets and verify operating pressure stays within 0–8 bar for consistent performance.
Yes. The design emphasizes high vibration isolation, helping to maintain stable actuation even when nearby equipment or conveyors induce mechanical vibrations. For best results, mount with vibration-damping hardware and ensure alignment remains controlled through the installation to minimize dynamic loads.
Key specs to confirm are the 8 in nominal diameter, 95 mm stroke, 0–8 bar operating pressure, and the theoretical 16,300 N force. Confirm the port size (G3/4) and the aluminium, non-magnetic body to ensure compatibility with your tooling and environment. Validate the supply air quality and duty cycle to match your cycle times.
Yes. The unit features frictionless operation with no lubrication required, reducing maintenance intervals and exposure to lubricant contamination in the work area. To maintain reliability, ensure air cleanliness, monitor supply pressure, and schedule periodic inspection of fittings and seals as part of your preventive maintenance plan.
Access CAD resources via the CAD link provided in the product downloads, and consult the Datasheet (PDF) for full specifications, installation guidelines, and compatibility notes. These resources help with proper integration, spare parts planning, and cost-justification during procurement and engineering reviews.