Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 100mm 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
- Stroke100 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-40S
The AirTAC SAIJ125X100-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 60 to 100 mm. It delivers 6136 N of push force and 5734 N of pull force at 0.5 MPa, placing it firmly in the heavy-duty class. The extruded aluminum barrel features sensor grooves on both sides, and the integrated magnet supports position detection.
This specific SKU features a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance compared to standard carbon steel. The rear adjuster acts as a travel stop to fine-tune end positions during commissioning without adding external stops. Note that this adjuster only sets the end-of-travel deceleration point; it does not lock or hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 100 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 SAIJ125AX100-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×100 | 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 SAIJ125AX100-40S Is Used
Product Changeovers
Dial in the exact end-stop for different part lengths on a single fixture without physically replacing the cylinder or adding external shims.
Heavy Forming End-Stops
Leverage 6136 N of thrust at 0.5 MPa for pressing operations while using the 40 mm adjuster to tune the bottoming position precisely.
Machine Commissioning
Fine-tune the 60-100 mm travel window during initial setup to resolve mechanical timing issues or clearances without machining new mounts.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-40S the Right Cylinder?
Choose this 125 mm bore when an application requires substantial thrust—stepping down to a 100 mm bore reduces the 0.5 MPa push force to 3927 N. The adjustable 40 mm window is ideal for machine changeovers where the exact end position varies by product size, avoiding the need to physically swap a fixed-stroke SAI cylinder. For load-holding without continuous air pressure, this cylinder is insufficient; you should specify a SAIL (air-released lock) or BSAI (clamp-lock) model instead.
When matching this cylinder for ISO 15552 interchangeability, verify the 125 mm bore, 100 mm nominal stroke, 40 mm adjustment range, PT tapered port threads, and the -S magnet option. The standard speed range for this bore is 30-500 mm/s. Mounting options include the reduced SAIJ set: Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR brackets found on other variants.
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 SAIJ125AX100-40S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. The operational speed range is 30-500 mm/s.
The rear adjuster screw acts as an external stop, allowing you to shorten the 100 mm nominal stroke by up to 40 mm, creating a 60-100 mm usable travel window. It sets the end position but does not lock the load without live air pressure.
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