Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-40S
The 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 interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ125 mm
- Stroke180 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
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.
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 | 5734 N | 5734 N |
| 0.7 MPa | 8027 N | — |
| Max (@1.0 MPa) | 1169 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. 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.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-40S the Right Cylinder?
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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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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