Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-30 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 SAIJ125X220-30
The AirTAC SAIJ125X220-30 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering a robust 6136N push force at 0.5 MPa. By turning the rear stopper screw, you can trim the effective travel by up to 30 mm, creating a precise 190-220 mm usable window for product changeovers without swapping hardware. This bore features a 32 mm carbon steel piston rod and a PT tapered G1/2 port to handle high flow and heavy loads.
The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches if a magnet is added later. Unlike a fixed-stroke SAI, this adjustable model allows fine end-position tuning at commissioning, though the adjuster acts purely as a travel stop and will not hold the load without continuous live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-30 |
|---|---|
| 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 SAIJ125X220-30
| 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 SAIJ125X220-30 Is Used
Product Size Changeovers
Quickly dial in the 190-220 mm stroke window during format changes on packaging lines, eliminating the need to physically swap out cylinders for different carton sizes.
Heavy Fixture Positioning
Leverage the 6136N push force to move heavy machining fixtures into place while using the rear adjuster to perfectly time the end-stop against the workpiece.
Assembly Line Timing
Fine-tune the extend position during initial machine commissioning to synchronize multiple actuators without fabricating custom spacer blocks.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-30 the Right Cylinder?
Select this 125 mm bore when a 100 mm cylinder (providing 3927N push at 0.5 MPa) lacks the thrust for moving heavy jigs, but a 160 mm bore is physically too large for the machine envelope. The 190-220 mm adjustable travel window is ideal for lines running multiple product sizes, letting operators dial in the exact end-stop mechanically rather than adding external stops. For any load-holding requirements without live air, this cylinder is insufficient as the rear screw is not a lock; consider an AirTAC SAIL or BSAI model instead.
Because this unit features a 220 mm stroke, the 32 mm carbon steel rod provides excellent rigidity, but you should still ensure adequate external guiding to prevent side-loading damage. To match this ISO 15552 footprint exactly, specify the 125 mm bore, 220 mm stroke, 30 mm adjustment, PT port thread, and your required mounting style from the available SAIJ set: Basic, FA, LB, TC, FTC, TCM1, or TCM2.
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 SAIJ125X220-30 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136N of push force and 5734N of pull force. It can reach a maximum push force of 11045N at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 220 mm nominal stroke by up to 30 mm, providing a usable travel range of 190-220 mm. It only sets the end position and does not lock the load without air pressure.
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