Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 220mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke220 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-75
The AirTAC SAIJ125X220-75 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 6136 N push force at 0.5 MPa, making it suitable for heavy-duty positioning tasks. Equipped with a standard carbon steel rod and PT tapered port threads, it provides a reliable sealing interface.
This model provides an adjustable travel window of 145 to 220 mm, allowing you to dial back the nominal stroke by up to 75 mm during commissioning. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement. It operates at speeds between 30 and 500 mm/s and utilizes adjustable air cushions at both ends to manage kinetic energy.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 220 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| 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, 40 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×220 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-75 Is Used
Variable End-Stop Forming
Dial in the exact 145 to 220 mm crushing or forming depth on heavy press equipment without physically changing the cylinder.
Product Size Changeover
Quickly reconfigure diverter stroke length on a packaging line to handle different carton sizes by adjusting the rear stopper.
Heavy Fixture Clamping
Secure large workpieces with up to 6136 N of force while fine-tuning the clamp position to accommodate raw material variations.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-75 the Right Cylinder?
Choose this 125 mm bore cylinder when an application requires substantial force, such as 6136 N push at 0.5 MPa, combined with a variable end-stop. If your setup needs less force, stepping down to an 80 mm bore yields 2513 N push, whereas a 160 mm bore offers 10053 N for heavier loads. The rear adjuster on this SAIJ unit allows precise end-position tuning without swapping cylinders or adding external stops, unlike a fixed-stroke SAI model.
Because the stroke is 220 mm, ensure external guiding is used to prevent excessive side-loading on the 32 mm carbon steel rod. The rear screw acts purely as a travel stop and does not hold the load without live air; for load-holding without pressure, consider an external rod lock or the SAIL lock variant. This cylinder uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets.
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 SAIJ125 Adjustable Cylinder SAIJ125X220-75 FAQ
The rear adjuster acts as an external stopper, allowing you to shorten the effective stroke by up to 75 mm. This creates a usable travel window of 145 to 220 mm, which is set mechanically during commissioning without changing the cylinder.
At a standard operating pressure of 0.5 MPa, this 125 mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N. At 0.9 MPa, the push force increases to 11045 N.
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