Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-100 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 SAIJ125AX220-100
The AirTAC SAIJ125X220-100 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 6136N pull force at 0.5 MPa and features a wide usable travel window of 120 to 220 mm, letting you shorten the effective stroke by up to 100 mm during commissioning without swapping out the unit.
This bore uses a SUS420J2 stainless steel rod (code A) for improved corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches. The rear adjuster acts purely as a mechanical stop to fine-tune the end position; it does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-100 |
|---|---|
| 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 SAIJ125AX220-100
| 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 SAIJ125AX220-100 Is Used
Product Changeover
Dial in the 120-220 mm travel window rapidly when switching product sizes on an automated line, avoiding manual external stop adjustments.
End-Position Tuning
Fine-tune the retract stroke during machine commissioning to absorb mechanical tolerances and achieve exact positioning without hardware swaps.
Heavy Assembly Pressing
Leverage the 6136N pull force at 0.5 MPa for heavy-duty joining or pressing tasks where the exact end-stop needs slight field adjustment.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-100 the Right Cylinder?
Choose this 125 mm bore when your application requires substantial thrust, such as the 6136N pull or 8590N push at 0.7 MPa, but demands on-the-fly end-position tuning. If you need less force, step down to an 80 mm bore (2268N pull at 0.5 MPa); for heavier loads, a 160 mm bore provides 9425N pull. The 100 mm adjustment range is ideal for product-size changeovers on a production line, replacing the need to bolt on external stops or buy a fixed-stroke SAI cylinder for every variant.
For an ISO 15552 replacement, match the 125 mm bore, 220 mm stroke, 100 mm adjuster, PT port, and your required mounting style. SAIJ supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, explicitly omitting FB, CA, CB, and CR. Because this is a 220 mm stroke, it is under the 300 mm side-load threshold, but always ensure proper guiding for heavy loads. If your process requires true load-holding without continuous air pressure, use an SAIL air-released lock or BSAI clamp-lock cylinder instead of relying on the adjuster.
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 SAIJ125AX220-100 FAQ
The rear adjuster screw acts as a mechanical stop, allowing you to trim the effective stroke back from the nominal 220 mm down to as little as 120 mm. This provides a 100 mm usable travel window for fine-tuning the end position at commissioning. The adjuster only sets the travel limit and does not lock or hold the load without live air pressure.
At 0.5 MPa, this 125 mm bore cylinder generates 6136N of pull force and 6136N of push force. If you operate at 0.7 MPa, the push force increases to 8590N, and the pull force to 5734N.
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