Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 1000mm 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
- Stroke1000 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-40S
The AirTAC SAIJ125X1000-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster, enabling a usable travel window of 960 to 1000 mm. It delivers 6136 N of push force at 0.5 MPa and integrates a magnetic piston for position sensing. The extruded aluminum barrel includes sensor grooves on both sides, strictly classifying it as a profile cylinder rather than a tie-rod design.
This specific SKU is built with a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance and utilizes PT tapered port threads. The rear adjustment mechanism acts purely as a mechanical stop to fine-tune the retract end position during commissioning. It does not lock or hold the load without continuous live air pressure, meaning external rod locks are required for fail-safe load holding.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 1000 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 SAIJ125AX1000-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×1000 | 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 SAIJ125AX1000-40S Is Used
Long-Stroke Positioning
Dial in the exact retract distance within the 960-1000 mm window during machine commissioning to accommodate varying product lengths without external stopper hardware.
Material Handling Setup
Adjust the end-stop on the fly during product size changeovers on a conveyor line, utilizing the 6136 N push force to move heavy pallets precisely.
Heavy Assembly Press
Leverage the SUS420J2 stainless steel rod for moisture resistance in a washdown assembly area while setting the exact 1000 mm travel limit for the press cycle.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-40S the Right Cylinder?
Choose this 125 mm bore when an 80 mm bore (providing 2513 N push at 0.5 MPa) is insufficient for your load, but stepping up to a 160 mm bore (10053 N) would be excessive overkill. The adjustable stroke is selected over a fixed SAI cylinder when you need precise end-position tuning during machine setup or product changeover without adding external stopper blocks. Because the stroke is 1000 mm, the 32 mm rod diameter requires external guide support to prevent excessive side-loading and rod binding.
For ISO 15552 replacement matching, verify the 1000 mm stroke, 40 mm adjustment range, PT port thread, and the -S magnet option. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, intentionally omitting FB, CA, CB, and CR brackets. If true position holding without live air is needed, look to the SAIL or BSAI series instead of relying on the rear 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 SAIJ125AX1000-40S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can reach up to 11045 N push force at 0.9 MPa.
The rear adjuster acts as a mechanical stop that lets you trim the effective travel back by up to 40 mm, creating a 960-1000 mm usable window. It requires live air to maintain position and does not function as a lock.
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