Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-20 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 SAIJ125AX130-20
The AirTAC SAIJ125X130-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 110-130 mm usable travel window, allowing you to dial back the nominal 130 mm stroke by up to 20 mm during commissioning without adding external stops. Built to deliver 6136 N of push force at 0.5 MPa, it handles heavy-duty positioning with precision.
This unit ships with a SUS420J2 stainless steel rod (option A) for superior corrosion resistance and a PT tapered port thread. The extruded aluminum barrel includes dual sensor grooves, and the mounting set spans Basic, FA, LB, TC, FTC, TCM1, and TCM2. The rear adjuster acts purely as a travel stop to set deceleration endpoints, not as a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-20 |
|---|---|
| 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 SAIJ125AX130-20
| 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 SAIJ125AX130-20 Is Used
Product Changeover Tuning
Dial in the exact 110-130 mm retract stop during line changeovers without physically swapping the cylinder or bolting on external spacers.
Heavy Press Positioning
Leverage the 6136 N push force at 0.5 MPa to seat heavy components, using the rear screw to fine-tune the final clamping position.
End-Stop Calibration
Set precise deceleration endpoints on automated machinery, using the built-in air cushions alongside the 20 mm mechanical stopper.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-20 the Right Cylinder?
Choose this 125 mm bore when your application requires upward of 6133 N of thrust at 0.5 MPa, stepping up from an 80 mm bore that yields 2513 N. An adjustable-stroke model is preferred over a fixed SAI cylinder when you need to fine-tune the retract end-position on the fly for machine setup or product changeovers. To match this exact configuration for a replacement, verify the 125 mm bore, 130 mm stroke, 20 mm adjustment range, PT port thread, and SUS420J2 rod material.
Because the 130 mm stroke is under the 300 mm threshold, side-load stress is manageable, but always guide the load to prevent rod binding. If your process requires the load to be held in place without continuous air pressure, this standard adjuster cannot do that; you must integrate an external rod lock or pilot-operated check valve, or select the SAIL or BSAI series instead.
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 SAIJ125AX130-20 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 a maximum 1.0 MPa, it can deliver up to 1251 kgf.
The rear adjuster screw lets you shorten the effective travel from the nominal 130 mm down to 110 mm. It acts as a mechanical stop to fine-tune the end position at commissioning, but it does not lock or hold the load without live air pressure.
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