Airtac SAIJ125 Adjustable Cylinder SAIJ125AX195-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX195-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 195mm 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
- Stroke195 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX195-20
The AirTAC SAIJ125X195-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering a robust 6136N push force at 0.5 MPa. It features a SUS420J2 stainless steel rod for enhanced durability and PT tapered port threads. By turning the rear screw, you achieve a usable travel window of 175-195mm, enabling precise end-position tuning without swapping hardware.
This adjustable-stroke model omits the FB, CA, CB, and CR mounting styles, utilizing a focused set of ISO 15552 interfaces (Basic, FA, LB, TC, FTC, TCM1, TCM2). The rear adjuster acts purely as a mechanical stop to set the retraction endpoint and must not be confused with a locking mechanism, as it will not hold a load without continuous live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX195-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX195-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 195 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 SAIJ125AX195-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×195 | 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 SAIJ125AX195-20 Is Used
Product Changeovers
Dial in the 175-195mm travel window during format changes to accommodate varying package sizes without replacing the cylinder.
Heavy Clamping Fixtures
Leverage the 6136N push force to secure heavy workpieces, using the rear stopper to set precise clamping depth.
Machine Commissioning
Fine-tune the retract end-position during initial setup to perfect alignment and avoid costly mechanical modifications.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX195-20 the Right Cylinder?
Choose this 125mm bore when an 80mm cylinder (providing 2513N push at 0.5 MPa) lacks the necessary thrust, but a 160mm bore is physically oversized. The 20mm adjustment window is ideal for fine-tuning machine setups during product changeovers, offering flexibility that a fixed-stroke SAI cylinder cannot provide. For load-holding without live air, consider a SAIL or BSAI variant instead of relying on this stopper.
To match this exact ISO 15552 footprint, specify a 125mm bore, 195mm stroke, 20mm adjustment, PT port threads, SUS420J2 rod material, and no magnet. Because the 195mm stroke approaches mid-range lengths, ensure external guiding is used to handle side loads, as the 32mm rod thread cannot support severe cantilevered weights alone.
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 SAIJ125AX195-20 FAQ
At 0.5 MPa, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
The rear adjuster screw allows you to shorten the 195mm nominal stroke by up to 20mm, creating a usable travel window of 175-195mm. This stopper sets the end position but does not lock the load without air pressure.
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