Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 200mm 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
- Stroke200 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-30S
The AirTAC SAIJ125X200-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 170 to 200 mm. It delivers a robust 6136 N push force at 0.5 MPa, making it suitable for heavy-duty positioning tasks. The integrated -S magnet enables position feedback via AirTAC CMSE reed and DMSE electronic sensors housed in the dual-side barrel grooves.
This variant features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and a PT tapered port thread. The external rear stopper allows you to trim the effective stroke by up to 30 mm during commissioning without swapping hardware. Remember that this adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 200 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 SAIJ125AX200-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×200 | 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 SAIJ125AX200-30S Is Used
Machine Setup Changeover
Dial in the exact 170-200 mm retract position during product family changeovers without physically swapping the cylinder or adding external shims.
Heavy Forming End-Stop
Leverage the 6136 N push force at 0.5 MPa for heavy pressing or forming tasks, using the rear adjuster to set precise bottoming depth.
Variable Position Ejection
Adjust the ejection stroke length on the fly to accommodate different workpiece sizes exiting a mold or machining center.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-30S the Right Cylinder?
Select this 125 mm bore when a 100 mm bore (offering 3927 N at 0.5 MPa) lacks the necessary thrust, but a 160 mm bore is oversized. The 30 mm adjustable window is ideal for product changeovers on a line, letting you fine-tune the retract end-position rather than machining custom spacers or buying a fixed-stroke SAI cylinder. For load-holding without continuous air, consider an external rod lock or AirTAC SAIL/BSAI models.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 200 mm stroke, PT port thread, and Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting interface. Since the 200 mm stroke is under the 300 mm side-load threshold, the 32 mm rod handles standard loads well, though an external guide is recommended for heavy lateral forces.
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 SAIJ125AX200-30S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can achieve up to 11045 N push force at 0.9 MPa.
The rear adjuster acts as an external stopper, allowing you to shorten the 200 mm nominal stroke by up to 30 mm, creating a 170-200 mm travel window. It only sets the travel end and does not lock the load without live air pressure.
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