Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 90mm 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
- Stroke90 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-40
The AirTAC SAIJ125X90-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 50-90 mm usable travel window by allowing you to trim up to 40 mm from the 90 mm nominal stroke, enabling precise end-position tuning during commissioning. With a robust 125 mm bore, it delivers 6136 N of push force at 0.5 MPa and reaches a maximum of 1251 kgf at 1.0 MPa.
This extruded aluminum barrel design includes standard variable air cushions at both ends to manage kinetic energy. The rear adjuster acts purely as a mechanical stop to set the travel end and does not hold the load without live air pressure. For true load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 90 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 SAIJ125X90-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×90 | 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 SAIJ125X90-40 Is Used
Machine Changeovers
Dial in the exact end-position during product size changes on a packaging line without swapping the physical cylinder.
Variable End Stops
Set precise retract positions for multi-format tooling plates, using the 40 mm adjustment window to fine-tune the travel.
High-Force Clamping
Leverage the 1251 kgf maximum thrust to securely hold heavy workpieces while the rear stop sets the exact clamp depth.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-40 the Right Cylinder?
Choose this 125 mm bore model when your process requires high thrust, such as stepping down from a 160 mm bore that yields 10053 N at 0.5 MPa, or when a 100 mm bore providing 3927 N is insufficient. The adjustable stroke is ideal for machinery that requires variable end-stops during product changeovers, eliminating the need to physically swap cylinders or bolt on external stops. Because the stroke is 90 mm, side-load risks are minimal, but always ensure the load is guided externally.
To match this ISO 15552 cylinder exactly, specify the 125 mm bore, 90 mm stroke, 40 mm adjustment, PT tapered port threads, carbon steel rod, and standard mounting options including Basic, FA, LB, TC, FTC, TCM1, and TCM2. Note that FB, CA, CB, and CR mounts are omitted from this adjustable 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 SAIJ125X90-40 FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At its maximum 1.0 MPa pressure, it delivers up to 1251 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 90 mm nominal stroke by up to 40 mm, creating a 50-90 mm usable travel window. It only sets the end position and does not lock or hold the load without continuous air pressure.
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