Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-40S 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 SAIJ125X1000-40S
The AirTAC SAIJ125X1000-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push force at 0.5 MPa and features a 1000mm nominal stroke that can be fine-tuned down by up to 40mm, creating a precise 960-1000mm usable travel window. This built-in adjustability allows operators to dial in end positions during commissioning without adding external stops.
This model includes a magnetic piston (-S) for position detection and uses a standard carbon steel rod with an M27x2 thread. It features PT tapered port threads (G1/2 port size) and operates at speeds of 30-500mm/s. The extruded aluminum barrel includes sensor grooves on both sides, accommodating AirTAC CMSE reed or DMSE electronic solid-state switches for reliable feedback.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-40S |
|---|---|
| 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 SAIJ125X1000-40S
| 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 SAIJ125X1000-40S Is Used
Product Size Changeovers
Quickly fine-tune the 960-1000mm travel window during line changeovers to accommodate different product lengths without physically replacing the actuator.
Heavy Material Ejection
Leverages the 6136N push force at 0.5 MPa to reliably push heavy molds or machined components out of a workstation on long-stroke automated lines.
Commissioning End-Stop Tuning
Allows maintenance technicians to precisely dial in the final retract position during machine setup, absorbing mechanical tolerances over a 1000mm span via the rear screw.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-40S the Right Cylinder?
Choose this 125mm bore when an application requires substantial thrust—such as 6136N push at 0.5 MPa—exceeding the 2513N capacity of the 80mm bore, but without stepping up to the heavier 160mm class. The 40mm adjustment range is ideal for production lines handling varying product sizes, letting you reposition the retract stop on the fly instead of swapping cylinders. For any 1000mm stroke, the unsupported rod length is significant; despite the robust 32mm rod diameter, an external guide is strongly recommended to prevent excessive side-loading and premature seal wear.
When specifying a replacement, ensure you match the 125mm bore, 1000mm stroke, 40mm adjustment, PT port threads, and the -S magnet option. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2—omitting FB, CA, CB, and CR. Remember that the rear adjuster acts only as a travel stop and the air cushions handle deceleration; neither will hold a load without live air pressure. For dead-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 SAIJ125X1000-40S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder generates 6136N of push force and 5734N of pull force. At a maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster screw allows you to shorten the 1000mm nominal stroke by up to 40mm, providing a usable travel window of 960-1000mm. It acts as a mechanical stop to fine-tune the retract end position and does not lock the load without continuous air pressure.
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