Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-20 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 SAIJ125X1000-20
The AirTAC SAIJ125X1000-20 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push force and 5734N of pull force at 0.5 MPa, making it suited for heavy-duty positioning. The integrated adjuster allows you to trim the 1000mm nominal stroke back by up to 20mm, providing a precise 980-1000mm usable travel window for exact end-position tuning.
This model features a carbon steel piston rod and PT tapered port threads. It utilizes a reduced mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options. The extruded aluminum barrel includes sensor grooves on both sides, and adding an -S magnet enables tracking with AirTAC CMSE reed or DMSE electronic solid-state switches.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-20 |
|---|---|
| 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 SAIJ125X1000-20
| 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 SAIJ125X1000-20 Is Used
Long-Stroke Press Tuning
Dial in the exact bottoming position of a 1000mm press cycle within a 980-1000mm window during commissioning without adding external mechanical stops.
Product Changeover Stops
Adjust the retract end-position by up to 20mm on the fly to accommodate different package lengths on a heavy-duty handling line.
Heavy Load Positioning
Leverage 6136N of push force at 0.5 MPa to move large assemblies, using the rear screw to fine-tune the final resting coordinate.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-20 the Right Cylinder?
Select this 125mm bore cylinder when an application requires substantial thrust—stepping down to a 100mm bore yields 3927N push force at 0.5 MPa, while this model provides 6136N. The adjustable stroke is ideal for machine setups requiring variable end-stops or product changeovers without swapping the entire cylinder for a fixed-stroke SAI variant. Because the nominal stroke is 1000mm, an external guide is strongly recommended to prevent excessive side-loading on the 32mm rod.
For a direct ISO 15552 replacement match, verify the 125mm bore, 1000mm stroke, 20mm adjustment range, PT port threads, and the required mounting style. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for dead-air load holding, 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 SAIJ125X1000-20 FAQ
At 0.5 MPa operating pressure, 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 acts as a mechanical stop, allowing you to shorten the effective stroke by up to 20mm. This creates a 980-1000mm usable travel window for fine-tuning the end position at commissioning, though it does not lock the load without continuous air pressure.
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