Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-40 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 SAIJ125AX1000-40
The AirTAC SAIJ125X1000-40 is a double-acting ISO 15552 profile cylinder with a rear stroke adjuster, engineered for heavy-duty positioning. It delivers 6136N pull force at 0.5 MPa and features a SUS420J2 stainless steel rod for superior corrosion resistance. By turning the external rear screw, you achieve a 960-1000mm usable travel window, allowing precise end-position tuning during commissioning without adding external stops.
This 125mm bore profile cylinder is not a tie-rod design and omits the FB, CA, CB, and CR mounting options, utilizing a reduced ISO 15552 mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2. The rear adjuster acts purely as a travel stop to set deceleration endpoints and does not hold the load without live air pressure. For position holding, an external rod lock or SAIL cylinder is required.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-40 |
|---|---|
| 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 SAIJ125AX1000-40
| 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 SAIJ125AX1000-40 Is Used
Heavy Material Forming
Provides 6136N pull force for clamping large metal workpieces, with the 40mm rear adjuster allowing precise tuning of the forming end-stop during setup.
Pallet Positioning Stops
Acts as a heavy-duty stopper for large pallets on a conveyor line, using the 960-1000mm travel window to adapt to different pallet depths on the fly.
Automated Assembly Presses
Delivers reliable downward thrust for assembly stations, where the rear screw fine-tunes the bottom dead center without needing mechanical shims.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-40 the Right Cylinder?
Select this 125mm bore model when a 100mm bore provides insufficient thrust (5497N push at 0.7 MPa) and you need the robust 8590N push capacity at the same pressure. The 40mm adjustment range is ideal for machine setup and product changeover, letting you dial in the exact 960-1000mm stroke on the fly instead of swapping out a fixed-stroke SAI cylinder. Because the nominal stroke is 1000mm, an external guide rail is strongly recommended to prevent excessive side-loading on the M27x2 rod thread.
When replacing an ISO 15552 cylinder, match the 125mm bore, 1000mm stroke, 40mm adjustment, PT G1/2 port, and the required mounting accessory. Note that without a -S magnet suffix, this unit cannot host CMSE reed or DMSE solid-state sensors.
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 SAIJ125AX1000-40 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 1251 kgf of push force.
The rear adjusting screw acts as an external stopper that lets you mechanically shorten the effective stroke by up to 40mm, creating a 960-1000mm usable travel window. It only sets the travel end and does not lock or hold the load without continuous air pressure.
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