Airtac SAIJ125 Adjustable Cylinder SAIJ125X140-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X140-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 140mm 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
- Stroke140 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X140-100S
The AirTAC SAIJ125X140-100-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the nominal 140 mm travel by up to 100 mm, yielding a highly flexible 40-140 mm usable window. It delivers 6136 N of pull force at 0.5 MPa and reaches a maximum of 1251 kgf at 1.0 MPa. The PT tapered port and integrated sensor grooves on both sides of the extruded aluminum barrel ensure robust pneumatic connections and straightforward sensor placement.
Because this variant includes the -S magnet option, it directly supports AirTAC CMSE reed and DMSE electronic solid-state switches for precise end-of-travel detection. The 32 mm carbon steel piston rod and M27x2 rod thread provide substantial rigidity, while the 40 mm variable air cushions at both ends manage impact deceleration across the 30-500 mm/s speed range.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X140-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X140-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 140 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 SAIJ125X140-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×140 | 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 SAIJ125X140-100S Is Used
Variable End-Stop Tuning
Dial the stroke back from 140 mm down to 40 mm to establish a precise, repeatable end-position for multi-format packaging lines without adding external mechanical stops.
Machine Changeover Setup
Rapidly adjust the cylinder's effective travel window during product format changes, cutting commissioning time and eliminating the need to physically swap out the entire actuator.
Heavy-Duty Positioning
Leverage the 6136 N pull force at 0.5 MPa to shift heavy pallets or fixtures into exact alignment, relying on the 32 mm carbon steel rod to resist deflection.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X140-100S the Right Cylinder?
Choose this 125 mm bore when 80 mm bore cylinders (providing 2268 N pull at 0.5 MPa) lack the necessary force, but a 160 mm bore (9425 N pull) would be physically oversized. The massive 100 mm adjustment range is selected over a fixed-stroke SAI when an application requires frequent product-size changeovers, allowing operators to dial in the exact end-position without swapping hardware.
When matching ISO 15552 interchangeable replacements, specify the 125 mm bore, 140 mm stroke, 100 mm adjustment, PT port, and the -S magnet requirement. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding without pressure, utilize an external rod lock or select the SAIL or BSAI pneumatic locking series.
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 SAIJ125X140-100S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of pull force and 8590 N of push force at 0.7 MPa. The maximum thrust is 1251 kgf when operated at 1.0 MPa.
The rear adjuster screw allows you to shorten the 140 mm nominal stroke by up to 100 mm, creating a usable travel window of 40 to 140 mm. This stopper fine-tunes the retract end-position at commissioning but does not lock the load without live air pressure.
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