Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 800mm 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
- Stroke800 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-100
The AirTAC SAIJ125X800-100 is a double-acting ISO 15552 profile cylinder featuring a rear mechanical stopper that allows you to trim the effective travel. With a nominal 800mm stroke and a 100mm adjustment range, it provides a usable 700-800mm travel window for precise commissioning without external shims. It delivers 6136N of push force at 0.5 MPa and utilizes a robust 32mm carbon steel rod with an M27x2 thread to handle heavy loads.
This model integrates variable air cushions at both ends to manage kinetic energy, but the rear adjuster functions strictly as a travel stop, not a lock. The extruded aluminum barrel includes sensor grooves on both sides for adding CMSE or DMSE switches. It supports a dedicated mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 800 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 SAIJ125X800-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×800 | 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 SAIJ125X800-100 Is Used
Machine Changeover
Dial in the 700-800mm travel window during product size changes to set new end positions quickly without physically replacing the actuator.
Heavy Pressing Operations
Leverage the 6136N push force at 0.5MPa for heavy forming or pressing tasks, using the rear stopper to fine-tune the final contact position.
Long-Stroke Diverting
Actuate large conveyor diverters or heavy pallet stops over an 800mm distance, relying on the M27x2 thread and 32mm rod for structural rigidity.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-100 the Right Cylinder?
Choose this 125mm bore when an 80mm cylinder (providing 2513N push at 0.5MPa) lacks the thrust for your heavy displacement requirements, but a 160mm bore (10053N) would be physically oversized. The 100mm adjustment window is ideal for product changeovers on a line, allowing you to dial in the exact end position without swapping out the cylinder. To match an ISO 15552 replacement, verify the 800mm stroke, 100mm adjuster, PT G1/2 port, and the required mounting accessory. Because the stroke is 800mm, an external guide is strongly recommended to prevent excessive side-loading on the rod.
If your application requires the load to be held in place without continuous live air pressure, a standard SAIJ will not suffice. The rear adjuster only sets the travel end; for true load-holding, select an AirTAC SAIL (pneumatic lock) or BSAI (clamp-lock) cylinder, or install an external rod lock.
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 SAIJ125X800-100 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At the maximum rated pressure of 1.0 MPa, it can deliver up to 1251kgf of push force.
The rear adjusting screw acts as a mechanical stopper that lets you shorten the effective stroke by up to 100mm. This creates a usable travel window of 700-800mm, allowing you to fine-tune the end position at commissioning without adding external stops.
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