Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-100 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 SAIJ125X210-100
The AirTAC SAIJ125X210-100 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 125 mm bore and a 210 mm nominal stroke, yielding a usable travel window of 110-210 mm. This wide adjustment range allows operators to dial in the retract end-position precisely during commissioning or product changeovers without swapping out the entire actuator.
Delivering 6136 N of pull force at 0.5 MPa, this large-bore cylinder handles heavy loads. The extruded aluminum barrel includes sensor grooves on both sides for CMSE or DMSE switches, though this specific SKU lacks the -S magnet. It uses a PT tapered port (G1/2), a 32 mm carbon steel rod with an M27x2 thread, and 40 mm variable air cushions at both ends to manage kinetic energy.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-100 |
|---|---|
| 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 SAIJ125X210-100
| 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 SAIJ125X210-100 Is Used
Variable End-Stop Tuning
Perfect for assemblies requiring precise retract positions, allowing operators to trim up to 100 mm off the 210 mm stroke to accommodate different tooling lengths.
Product Size Changeover
Enables rapid line adjustments for varying product dimensions without physically replacing the cylinder, minimizing downtime between production runs.
Heavy-Duty Positioning
Leverages the 125 mm bore's 6136 N pull force to move heavy fixtures while fine-tuning the final resting position via the rear stopper.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-100 the Right Cylinder?
Select this 125 mm bore actuator when an application requires substantial force—6136 N pull at 0.5 MPa—along with flexible end-stop positioning. If your setup demands less thrust, stepping down to a 100 mm bore provides 3681 N of pull force, whereas moving up to a 160 mm bore yields 9425 N. The 100 mm adjustment window is particularly useful for machinery processing varying product sizes, replacing the need for fixed-stroke SAI cylinders when the exact final position is unknown.
Because the nominal stroke is 210 mm, an external guide is recommended to prevent excessive side-loading on the 32 mm rod. To match this ISO 15552 footprint for a replacement, verify the 125 mm bore, 210 mm stroke, 100 mm adjustment, G1/2 PT port, and mounting style (Basic, FA, LB, TC, FTC, TCM1, or TCM2). Remember that the rear adjuster acts only as a travel stop; for load-holding without live air pressure, consider an SAIL or BSAI cylinder.
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 SAIJ125X210-100 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of pull force and 6136 N of push force. At the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjusting screw acts as a mechanical stop, allowing you to shorten the effective stroke from 210 mm down to as little as 110 mm. It sets the travel end and works with the air cushion for deceleration, but it does not lock the load without live air pressure.
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