Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-40 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 SAIJ125X1000-40
The AirTAC SAIJ125X1000-40 is a double-acting ISO 15552 profile cylinder featuring a rear mechanical adjuster that trims the nominal 1000 mm stroke back by up to 40 mm, providing a usable travel window of 960 to 1000 mm. It delivers robust thrust, generating 6136 N of push force and 5734 N of pull force at a 0.5 MPa operating pressure.
This large-bore actuator uses a PT tapered G1/2 port and a 32 mm carbon steel rod with an M27x2 thread to handle substantial loads. The extruded aluminum barrel incorporates sensor grooves on both sides for direct mounting of CMSE reed or DMSE solid-state switches, while the rear stopper acts purely as a travel end deceleration device rather than a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-40 |
|---|---|
| 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 SAIJ125X1000-40
| 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 SAIJ125X1000-40 Is Used
Variable End-Stop Tuning
Dial in the exact 960 to 1000 mm end position during machine commissioning to accommodate different product lengths without replacing the actuator.
Long-Stroke Pressing
Leverage the 6136 N push force at 0.5 MPa for long-travel pressing or forming operations, using the 40 mm adjuster to set precise final bottoming depth.
Product Changeover Lines
Quickly reconfigure long-travel conveyor diverters or pushers by turning the rear adjuster screw to match new package sizes on automated packaging lines.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-40 the Right Cylinder?
Selecting this 125 mm bore actuator makes sense when your application requires the 6136 N push force at 0.5 MPa (or 8590 N at 0.7 MPa) and a long 1000 mm travel. If your setup only needs the 3927 N push force of a 100 mm bore, stepping down reduces air consumption; however, this 125 mm size is required for heavier moving masses. The 40 mm adjustable range is ideal for fine-tuning the end position during commissioning or product changeovers without swapping the physical cylinder.
Because the stroke is 1000 mm, the unsupported rod is highly susceptible to side-loading and deflection; an external guide rail must be used to prevent premature seal wear. The rear adjuster and integrated air cushions only decelerate the load at the travel end and will not hold the load without live air pressure. For true fail-safe load holding, use an external pilot-operated check valve or an AirTAC SAIL locking cylinder. This profile cylinder is dimensionally interchangeable per ISO 15552 and uses the SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR brackets.
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 SAIJ125X1000-40 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. If you increase the pressure to 0.7 MPa, the push force rises to 8590 N.
The rear mechanical adjuster allows you to shorten the 1000 mm nominal stroke by up to 40 mm, creating a usable travel window of 960 to 1000 mm. This stopper decelerates the piston at the retract end but does not lock the load without continuous air pressure.
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