Airtac AIRTAC SC125-160 Standard Cylinder SC125X450H
The AirTAC Airtac AIRTAC SC125-160 Standard Cylinder SC125X450H is a genuine double-acting standard air cylinder with a Ø125mm bore and 450mm stroke, PT1/2 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ125 mm
- Stroke450 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 28 mm
About the Airtac AIRTAC SC125-160 Standard Cylinder SC125X450H
The SC125X450H is a double-acting pneumatic cylinder from the AirTAC SC tie-rod series, combining a 125 mm bore with a 450 mm stroke and high-temperature Viton (FKM) seals. At 0.5 MPa air pressure it generates 6136 N of push force and 5734 N of pull force, rising to a maximum theoretical thrust of 11045 N at 0.9 MPa (1251 kgf at 1.0 MPa). The 32 mm diameter piston rod features an M27×2 knuckle thread for robust end-effector attachment.
This model is configured with the 'H' suffix specifying Viton seals, which shifts the operating temperature range from the standard -20–+70 °C up to 0–+150 °C, making it suitable for hot environments such as foundries, autoclaves, or drying lines. The cylinder body has a length 'A' of 203 mm, giving a total extended length of approximately 653 mm. As a large-bore ISO 6430 class cylinder, its speed range is 30–500 mm/s, and the adjustable pneumatic cushion (28 mm length) decelerates the piston smoothly at stroke ends to reduce impact.
Airtac AIRTAC SC125-160 Standard Cylinder SC125X450H Technical Specifications
| Model | Airtac AIRTAC SC125-160 Standard Cylinder SC125X450H |
|---|---|
| Series | SC big-bore tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Stroke | 450 mm |
| Acting type | Double acting |
| Port size | PT1/2 |
| Rod thread | M27×2 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Adjustable, 28 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SC series datasheet. Operating pressure 0.15–1.0 MPa, proof pressure 1.5 MPa, temperature −20 to +70 °C. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (approx.) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac AIRTAC SC125-160 Standard Cylinder SC125X450H
| SC | Standard tie-rod cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×450 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related variants: SCD (double rod), SCJ (adjustable stroke), SCT (multi-position). Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac AIRTAC SC125-160 Standard Cylinder SC125X450H Is Used
High-Temperature Clamping
With Viton seals rated to 150°C, the SC125X450H excels in hot-work clamping fixtures for welding, brazing, or composite curing presses where standard seals would degrade.
Heavy Part Ejection
Delivering over 11000 N of force at 0.9 MPa, this cylinder pushes heavy castings or stampings off a conveyor line in foundry and metal-forming automation cells.
Press-Fit Assembly
The 450 mm stroke and high force output suit press-fit operations for large bearings, bushings, or shafts, where controlled, cushioned insertion is required in hot drivetrain assembly areas.
Is the Airtac AIRTAC SC125-160 Standard Cylinder SC125X450H the Right Cylinder?
Select the SC125 bore when your application requires push forces in the 6136 N range at standard plant pressure; if your load can be managed by 3927 N, stepping down to the SC100 bore reduces air consumption and physical size. For strokes of 450 mm, side-load management is critical—the 32 mm rod is strong in pure push/pull but can suffer bending under lateral forces, so always guide the load externally or use a guided cylinder if off-axis forces are present. When replacing an existing cylinder, match five points exactly: 125 mm bore, 450 mm stroke, PT port thread, the specific mounting accessory (this unit is basic, supplied without brackets—order LB, FA, FB, CA, CB, or TC mounts separately using the F-SC125 prefix), and the absence of a barrel magnet. Note that the H suffix indicates Viton seals for high-temperature compatibility, not a standard NBR or TPU seal.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac AIRTAC SC125-160 Standard Cylinder SC125X450H FAQ
At 0.7 MPa operating pressure, the SC125 bore produces 8590 N of push force and 5734 N of pull force. The maximum operating thrust at 0.9 MPa is 11045 N, with a theoretical maximum of 1251 kgf at 1.0 MPa.
No. The SC125X450H is a double-acting cylinder and will drift or drop if air pressure is lost or the directional valve is centered. To hold a load safely without live pressure, you must add an external rod lock, a pilot-operated check valve, or a mechanical brake—the adjustable air cushion only decelerates the piston at stroke end, it does not lock or hold position.
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