Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-30S 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 SAIJ125X220-30S
The AirTAC SAIJ125X220-30-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 6136N push force at 0.5 MPa and features a built-in magnet for position sensing. By turning the rear stopper screw, you achieve a precise 190 to 220 mm usable travel window without swapping hardware.
This 125 mm bore unit uses a G1/2 port and a 32 mm carbon steel rod to handle demanding loads. It includes adjustable air cushions at both ends to manage kinetic energy. For position feedback, the integrated magnet works seamlessly with AirTAC CMSE reed and DMSE electronic sensors fitted into the dual-side barrel grooves.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-30S |
|---|---|
| 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 SAIJ125X220-30S
| 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 SAIJ125X220-30S Is Used
Product Changeover
Dial in the 190-220mm travel window during format changes on a packaging line, avoiding the need to physically swap out cylinders for different carton sizes.
End-Stop Tuning
Fine-tune the retract position during machine commissioning to perfectly align heavy clamping fixtures without adding external mechanical stops.
Heavy Assembly Press
Leverage the 6136N thrust at 0.5 MPa to seat heavy components securely, using the adjustable stroke to control the exact pressing depth.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-30S the Right Cylinder?
Choose this 125 mm bore when a 100 mm cylinder (offering 3927N push at 0.5 MPa) lacks the necessary thrust, but a 160 mm bore is physically oversized. The 30 mm adjustment range is ideal for fine-tuning the retract end position during product changeovers, providing flexibility a fixed-stroke SAI cannot match. Remember that the rear adjuster functions strictly as a travel stop, not a lock; the cylinder will not hold a load without live air pressure, so consider an SAIL or BSAI model if true mechanical locking is required.
Because the 220 mm stroke exceeds the 300 mm threshold, ensure external guide rails support the load to prevent excessive side-loading on the 32 mm rod. To match this ISO 15552 interchangeable cylinder exactly, specify the 220 mm stroke, 30 mm adjustment, PT tapered port threads, and the -S magnet option.
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 SAIJ125X220-30S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136N of push force and 5734N of pull force. At the maximum 1.0 MPa pressure, it achieves a push force of 12272N.
A rear stopper screw allows you to mechanically shorten the effective stroke by up to 30 mm. This creates a 190 to 220 mm usable travel window, enabling precise end-position tuning at commissioning without replacing the cylinder.
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