Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-40S 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 SAIJ125AX220-40S
The AirTAC SAIJ125X220-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 220 mm stroke that can be fine-tuned backward by up to 40 mm, yielding a precise 180-220 mm usable travel window. Delivering 1559 N of pull force at 0.5 MPa, it handles heavy loads while allowing on-the-fly end-position tuning.
This variant features a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel incorporates sensor grooves on both sides, and the PT tapered port threads ensure a robust pneumatic connection.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-40S |
|---|---|
| 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 SAIJ125AX220-40S
| 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 SAIJ125AX220-40S Is Used
Machine Changeover
Quickly dial the stroke back by up to 40 mm when switching product sizes on a packaging line, avoiding the need to physically swap cylinders.
End-Position Tuning
Fine-tune the retraction point during commissioning to perfectly align heavy 125 mm bore tooling without adding external mechanical stops.
Heavy Forming Operations
Leverage the 1559 N pull force at 0.5 MPa for pressing or forming tasks where the exact end-stop distance varies by material batch.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-40S the Right Cylinder?
Select this 125 mm bore cylinder when an application requires substantial thrust—such as 1559 N pull at 0.5 MPa—combined with variable end-stops for product changeovers. If your force requirements are lower, stepping down to a 100 mm bore yields 3681 N pull, whereas a 160 mm bore provides 9425 N pull for heavier demands. The adjustable stroke is ideal for machine setup, allowing you to dial in the 180-220 mm window without adding external stops or swapping out a fixed-stroke SAI cylinder.
Because the stroke is 220 mm, ensure adequate external guiding to prevent excessive side-loading on the rod. Remember that the rear adjuster acts strictly as a travel stop, not a lock; the SAIJ125X220-40-S cannot hold a load without live air pressure. For load-holding requirements, consider an AirTAC SAIL or BSAI cylinder. This model uses the standard SAIJ mounting subset (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 SAIJ125AX220-40S FAQ
It features a rear adjusting screw that acts as a mechanical stopper, allowing you to shorten the effective stroke by up to 40 mm. This creates a usable travel window of 180-220 mm, which can be fine-tuned during commissioning without changing the cylinder.
At 0.5 MPa operating pressure, this double-acting cylinder provides 1559 N of pull force and 1559 N of push force. It can deliver up to 6136 N of push force at its maximum 1.0 MPa pressure rating.
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