Airtac SAIJ125 Adjustable Cylinder SAIJ125X500-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X500-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 500mm 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
- Stroke500 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X500-10S
The AirTAC SAIJ125X500-10-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push force at 0.5MPa and features a 10mm adjustment range, creating a precise 490-500mm usable travel window for fine-tuning the retract end position without external stops. This variant includes a magnet for position sensing and uses a carbon steel rod with an M27x2 thread.
Because the nominal 500mm stroke is substantial, the 32mm rod diameter is critical for handling higher side loads, though an external guide remains essential for rigid mounting over this long travel. The extruded aluminum barrel incorporates sensor grooves on both sides, allowing you to easily install AirTAC CMSE reed or DMSE electronic solid-state switches. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X500-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X500-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 500 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 SAIJ125X500-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×500 | 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 SAIJ125X500-10S Is Used
Product Changeover
Dial in the 490-500mm travel window during packaging line format changes to accommodate different carton depths without changing the cylinder.
Machine Setup
Fine-tune the retract end position during initial commissioning to achieve precise mechanical alignment without adding external stopper blocks.
Heavy Material Handling
Leverage the 6136N push force at 0.5MPa to move heavy workpieces or pallets over a 500mm stroke in automated assembly cells.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X500-10S the Right Cylinder?
Choose this 125mm bore when a smaller 100mm cylinder (providing 3927N push at 0.5MPa) lacks the necessary thrust, but a larger 160mm bore (10053N) would be excessive. The 10mm adjustment window is ideal for dialing in exact end positions during machine commissioning or product changeover, replacing the need to swap out a fixed-stroke SAI cylinder. Fluid must be filtered to 40um air, operating between 0.15-1.0MPa.
For any stroke of 500mm, always incorporate an external guide to manage side loads and prevent rod binding. Note that the rear adjuster acts only as a travel stop and the air cushions only decelerate the load; neither will hold the load without live air. For load-holding without pneumatic pressure, consider an AirTAC SAIL locking cylinder, BSAI clamp-lock, or an external rod lock. To match this ISO 15552 interchangeable cylinder, specify: 125mm bore, 500mm stroke, PT tapered port thread, the required mounting style, and the -S magnet option.
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 SAIJ125X500-10S FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7MPa, the push force increases to 8590N.
The rear adjuster screw allows you to shorten the effective stroke by up to 10mm, providing a usable travel window of 490-500mm. It acts as a mechanical stop to fine-tune the end position and does not lock the load without live air pressure.
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