Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-10 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 SAIJ125AX210-10
The AirTAC SAIJ125X210-10 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 200 to 210 mm usable travel window, allowing you to trim the effective stroke by up to 10 mm during commissioning without adding external stops. Built with a SUS420J2 stainless steel piston rod, it delivers 6136 N of push force at 0.5 MPa, making it suited for heavy-duty positioning tasks.
This model uses a PT tapered G1/2 port and includes variable air cushions at both ends to decelerate heavy loads smoothly. The extruded aluminum barrel features sensor grooves on both sides for mounting CMSE reed or DMSE electronic switches, though this specific SKU is configured without a magnet. The rear adjuster acts strictly as a travel stop to set end positions, not as a lock, so live air pressure is required to hold the load in place.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-10 |
|---|---|
| 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 SAIJ125AX210-10
| 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 SAIJ125AX210-10 Is Used
Machine Setup Tuning
Dial in the exact 200-210 mm end position during initial commissioning to perfect a pressing or forming operation without machining new stopper blocks.
Product Changeover
Quickly adjust the retract distance up to 10 mm on a packaging line when switching to a slightly shorter product variant, minimizing downtime.
Heavy Fixture Positioning
Move heavy 125 mm bore fixtures into place with 6136 N of force, using the rear screw to fine-tune the final resting position against a hard stop.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-10 the Right Cylinder?
Choose this adjustable-stroke cylinder when you need precise end-position tuning at machine setup or during product changeovers, avoiding the need to swap out a fixed-stroke SAI cylinder. If your application requires slightly less force, stepping down to a 100 mm bore yields 3927 N of push force at 0.5 MPa. For load-holding without continuous air pressure, consider an SAIL air-released lock or BSAI clamp-lock cylinder instead of relying on the rear stopper.
To replace an ISO 15552 cylinder, match the 125 mm bore, 210 mm stroke, 10 mm adjustment range, PT G1/2 port, and desired mounting from the SAIJ set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the stroke is 210 mm, ensure adequate external guiding to prevent excessive side-loading on the 32 mm rod and M27x2 thread.
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 SAIJ125AX210-10 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 1251 kgf.
The rear adjusting screw acts as an external stopper that lets you shorten the 210 mm nominal stroke by up to 10 mm, providing a 200-210 mm travel window. It sets the end position but does not lock the load without live air pressure.
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