Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 180mm 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
- Stroke180 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-40S
The AirTAC SAIJ125X180-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 140 to 180 mm. It features a carbon steel rod and a PT tapered port. Delivering 6136 N of push force at 0.5 MPa, it handles heavy loads while allowing you to fine-tune the retract end position during commissioning.
This model includes a magnet (-S) for position sensing with AirTAC CMSE reed or DMSE electronic solid-state switches. The extruded aluminum barrel incorporates sensor grooves on both sides for flexible mounting. The rear adjuster acts purely as a travel stop for end-position tuning, not a lock, meaning live air is required to maintain the load.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 180 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 SAIJ125X180-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×180 | 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 SAIJ125X180-40S Is Used
Product Size Changeovers
Dial in the 140-180 mm travel window during production line changeovers to accommodate different product lengths without replacing hardware.
Commissioning End-Stop Tuning
Fine-tune the retract end position at machine setup using the rear screw, avoiding the need to bolt on external stops or shims.
Heavy-Duty Positioning
Leverage the 6136 N push force at 0.5 MPa to move heavy pallets or workpieces, stopping precisely at the adjusted end point.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-40S the Right Cylinder?
Choose this 125 mm bore when you need substantial thrust, such as the 6136 N push force at 0.5 MPa, but require on-the-fly end-position adjustments without swapping cylinders. If your application requires less force, stepping down to a 100 mm bore yields 3927 N; stepping up to a 160 mm bore provides 10053 N. The adjustable 140-180 mm window is perfect for product-size changeovers on a line.
To replace an ISO 15552 cylinder, match the 125 mm bore, 180 mm stroke, 40 mm adjustment, PT port, and -S magnet. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the stroke is 180 mm, side-load is minimal, but always ensure proper alignment. For load-holding without air pressure, use a SAIL or BSAI cylinder instead of relying on the stopper.
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 SAIJ125X180-40S FAQ
The rear adjuster allows you to shorten the effective stroke by up to 40 mm, creating a usable travel window of 140 to 180 mm. It acts as a mechanical stop to set the end position and does not lock the load without live air pressure.
At 0.5 MPa, the push force is 6136 N and the pull force is 5734 N. At the maximum operating pressure of 1.0 MPa, it delivers a maximum push force of 1251 kgf.
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