Airtac SAIJ125 Adjustable Cylinder SAIJ125AX50-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX50-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 50mm 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
- Stroke50 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX50-10
The AirTAC SAIJ125X50-10 is a double-acting ISO 15552 profile cylinder featuring a rear mechanical adjuster that trims the retract end-position. With a nominal 50 mm stroke and a 10 mm adjustment range, it provides a highly tunable 40-50 mm usable travel window. This specific SKU utilizes a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and features PT tapered port threads.
Delivering 6136 N of push force and 5734 N of pull force at 0.5 MPa, this large-bore actuator handles heavy loads. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of switches. If position verification is required later, adding the -S magnet option allows the use of AirTAC CMSE reed or DMSE electronic solid-state sensors.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX50-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX50-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 50 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 SAIJ125AX50-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×50 | 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 SAIJ125AX50-10 Is Used
Heavy Clamping Tuning
Provides 6136 N of clamping force at 0.5 MPa while allowing operators to fine-tune the 40-50 mm travel window to accommodate varying workpiece thicknesses without changing tooling.
Product Size Changeover
The 10 mm rear stroke adjuster enables rapid machine reconfiguration for new product runs, letting technicians dial in the exact end-stop position at the commissioning console.
Short-Stroke Pressing
Ideal for high-force pressing tasks in a compact footprint, using the SUS420J2 stainless steel rod to withstand harsh industrial environments while operating at 30-500 mm/s.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX50-10 the Right Cylinder?
Select this 125 mm bore actuator when an application demands high thrust within a compact 50 mm stroke that requires precise end-stop tuning during commissioning. If your setup needs less force, stepping down to a 100 mm bore yields 3927 N push force at 0.5 MPa; conversely, a 160 mm bore provides 10053 N for heavier loads. Because the stroke is under 300 mm, side-load stress on the 32 mm rod is minimal, though external guiding remains best practice for rigid loads.
The 10 mm rear adjustment screw allows you to dial in the exact end position without swapping cylinders or adding external stopper blocks, which is ideal for product-size changeovers. Remember that the rear adjuster functions strictly as a travel stop, not a locking device. The cylinder cannot hold a load without live air pressure, so for fail-safe load holding, consider an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder. This model is dimensionally interchangeable per ISO 15552 and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
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 SAIJ125AX50-10 FAQ
It features a rear mechanical stopper that allows you to shorten the effective stroke by up to 10 mm. This creates a 40-50 mm adjustable travel window, enabling precise end-position tuning at commissioning without adding external stops.
At 0.5 MPa operating pressure, it provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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