Airtac SAIJ125 Adjustable Cylinder SAIJ125AX135-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX135-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 135mm 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
- Stroke135 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX135-10S
The AirTAC SAIJ125X135-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 125 to 135 mm. It delivers a robust 6136 N push force at 0.5 MPa, making it suitable for heavy-duty positioning tasks. The extruded aluminum barrel features sensor grooves on both sides, and this -S variant includes a magnet for direct compatibility with CMSE reed and DMSE electronic switches.
This model features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and utilizes PT tapered port threads. The rear adjusting screw allows you to trim the effective stroke by up to 10 mm during commissioning without swapping the cylinder or adding external stops. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX135-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX135-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 135 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 SAIJ125AX135-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×135 | 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 SAIJ125AX135-10S Is Used
Heavy-Duty Positioning
Leverages 6136 N of thrust at 0.5 MPa to shift heavy jigs, with the 10 mm adjuster allowing precise alignment of the final clamp position.
Machine Changeover
Quickly dials in the 125-135 mm travel window during product size transitions, eliminating the need to physically swap out cylinders on the line.
Assembly Line End-Stops
Acts as a robust end-stop for large pallets, using the rear screw to fine-tune the stopping distance without relying on external hard stops.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX135-10S the Right Cylinder?
Select this 125 mm bore when an 80 mm bore (delivering 2513 N push at 0.5 MPa) lacks the thrust for your application, but a 160 mm bore is physically too large. The adjustable 125-135 mm window is chosen over a fixed-stroke SAI cylinder when you need precise end-position tuning during machine setup or product changeover. Since the stroke is 135 mm, side-loading is minimal, but always ensure the M27x2 rod thread is properly aligned to maximize seal life.
For an exact ISO 15552 replacement, match the 125 mm bore, 135 mm nominal stroke, 10 mm adjustment code, PT port thread, and -S magnet option. Remember that the rear adjuster functions strictly as a travel stop and does not hold the load without live air; for fail-safe load holding without pressure, consider an AirTAC SAIL or BSAI cylinder.
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 SAIJ125AX135-10S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw allows you to shorten the nominal 135 mm stroke by up to 10 mm, creating a usable travel window of 125 to 135 mm. The adjuster acts as a mechanical stop to fine-tune the end position and does not lock the load without continuous air pressure.
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