Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-30S 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 SAIJ125X800-30S
The AirTAC SAIJ125X800-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 6136N push force at 0.5MPa and features a 30mm adjustment range, creating a usable travel window of 770-800mm for precise end-position tuning. The integrated -S magnet enables position detection with AirTAC CMSE reed or DMSE solid-state sensors.
This 125mm bore model uses a PT tapered G1/2 port and a 32mm carbon steel rod. The extruded aluminum barrel includes sensor grooves on both sides. Because the rear adjuster acts strictly as a mechanical stop to set the travel end, it does not hold the load without live air pressure; for dead-air load holding, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-30S |
|---|---|
| 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 SAIJ125X800-30S
| 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 SAIJ125X800-30S Is Used
Heavy Material Forming
Dial in the exact 770-800mm travel end-stop during press setup to accommodate varying material thicknesses without changing the cylinder.
Large Package Diverting
Adjust the retract distance on the fly to handle different pallet sizes on a heavy-duty conveyor line, ensuring precise routing.
Automated Assembly Stations
Fine-tune the end-position on heavy jigs during product changeover, leveraging the 6136N force to seat large components accurately.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-30S the Right Cylinder?
Select this 125mm bore when an application requires heavy thrust up to 6136N at 0.5MPa, stepping up from an 80mm bore that provides 2513N. The 30mm adjustment range is ideal for fine-tuning the retract position during machine setup or product changeover without swapping the cylinder or adding external stops. For a fixed end-position without the need for commissioning adjustments, the standard SAI cylinder is a simpler alternative.
With an 800mm stroke, the 32mm rod and M27x2 thread handle significant side loads, but an external guide is recommended to prevent rod bending over this long unsupported travel. This SAIJ variant supports a mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2. Operating speed is 30-500mm/s, and the PT port thread must be matched during installation.
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 SAIJ125X800-30S FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At the maximum 1.0MPa pressure, it delivers up to 1251kgf.
The rear adjuster screw allows you to shorten the nominal 800mm stroke by up to 30mm, providing a usable travel window of 770-800mm. This mechanical stop fine-tunes the end position but does not lock the load without continuous air pressure.
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