Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 210mm 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
- Stroke210 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-20S
The AirTAC SAIJ125X210-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. It features a PT tapered port, a robust 32mm SUS420J2 stainless steel rod, and a built-in magnet for position sensing. The integrated -20 adjustment code allows you to dial back the 210mm nominal stroke, providing a precise 190-210mm usable travel window for exact end-position tuning.
Because the rear screw acts purely as a mechanical stop and does not lock the load, live air is required to maintain position. This cylinder includes sensor grooves on both sides of the extruded aluminum barrel, supporting AirTAC CMSE reed and DMSE electronic switches for flexible mounting. It also retains the standard ISO 15552 mounting interface while utilizing the SAIJ subset of brackets (Basic, FA, LB, TC, FTC, TCM1, TCM2).
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 210 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 SAIJ125AX210-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×210 | 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 SAIJ125AX210-20S Is Used
Product Changeovers
Quickly fine-tune the 190-210mm travel window during line format changes without physically replacing the actuator.
High-Force Positioning
Delivers 6136N of thrust for clamping heavy components while allowing precise rear-screw adjustment of the final end-stop.
Machine Setup Calibration
Ideal for dialing in the exact retraction point at commissioning, preventing hard mechanical crashes on heavy machinery.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-20S the Right Cylinder?
Select this 125mm bore actuator when an application demands high thrust (6136N at 0.5 MPa) alongside variable end-stops, avoiding the need to swap physical cylinders during product changeovers. If your setup requires less force, stepping down to a 100mm bore yields 3927N; if more power is needed, a 160mm bore provides 10053N. Remember that the rear adjuster only sets the travel limit and is not a locking device. For load-holding without continuous air pressure, consider an external rod lock or the AirTAC SAIL/BSAI series. To replace an ISO 15552 cylinder, match the 125mm bore, 210mm stroke, PT port, and -S magnet requirement.
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 SAIJ125AX210-20S FAQ
The rear adjuster screw allows you to shorten the 210mm nominal stroke by up to 20mm, creating a 190-210mm usable travel window. It functions as a mechanical stop to fine-tune the end position and is not a lock.
At 0.5 MPa operating pressure, this double-acting cylinder provides 6136N of push force and 5734N of pull force. It can reach up to 11045N push force at 0.9 MPa.
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Standard models usually ship in 3-4 days.
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