Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 130mm 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
- Stroke130 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-50S
The AirTAC SAIJ125X130-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 125 mm bore and a 130 mm nominal stroke, yielding a usable travel window of 80 to 130 mm. Operating at 0.5 MPa, it delivers 6136 N of push force and 5734 N of pull force. The integrated magnet (-S) enables direct position sensing with AirTAC CMSE reed and DMSE electronic solid-state switches housed in the dual-side sensor grooves.
This adjustable-stroke design allows precise end-position tuning at commissioning without swapping the cylinder or adding external stops. The 32 mm carbon steel piston rod and M27x2 rod thread provide robust resistance to side loads, while the standard PT tapered port threads ensure a tight pneumatic seal. The rear adjuster acts strictly as a travel stop to set the retraction end, not as a lock, meaning it cannot hold a load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 130 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 SAIJ125X130-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×130 | 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 SAIJ125X130-50S Is Used
Variable End-Stop Positioning
Dial in the retraction point within the 80-130 mm window during machine setup to accommodate different material thicknesses without physically swapping out the actuator.
Product-Size Changeover
Quickly adjust the rear stopper on a packaging or handling line to process a new carton size, leveraging the 6136 N push force to move heavy loads reliably.
Commissioning Fine-Tuning
Trim the effective travel by up to 50 mm on-site to perfectly time the machine cycle, avoiding the need to dismount the cylinder and add machined external spacers.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-50S the Right Cylinder?
Select this 125 mm bore model when an application requires heavy thrust between 6136 N and 8590 N (at 0.5 to 0.7 MPa). If the load demands less force, stepping down to a 100 mm bore provides 3927 N at 0.5 MPa, whereas upgrading to a 160 mm bore yields 10053 N. The 50 mm adjustment range is ideal for production lines running varied product sizes, allowing the retract end-stop to be dialed in on the fly instead of machining new hard stops. For load-holding without continuous air pressure, a plain SAIJ is insufficient; consider an AirTAC SAIL pneumatic lock, a BSAI clamp-lock cylinder, or an external pilot-operated check valve.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 130 mm stroke, 50 mm adjustment, PT port threads, and the -S magnet requirement. Mounting options for the SAIJ series include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because this unit operates at 130 mm, it falls below the 300 mm threshold that would typically require an external guide to support the rod against sagging or deflection. The standard speed range for this bore size is 30-500 mm/s, regulated by the variable air cushions at both ends.
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 SAIJ125X130-50S FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. If pressure is increased to 0.7 MPa, the push force rises to 8590 N.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 130 mm nominal stroke by up to 50 mm, providing an effective travel range of 80 to 130 mm. It sets the end position but does not lock the load without live air pressure.
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