Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-75S 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 SAIJ125X90-75S
The AirTAC SAIJ125X90-75-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 15-90 mm, allowing you to dial back the 90 mm nominal stroke by up to 75 mm during machine setup or product changeover. Delivering 6136 N of push force at 0.5 MPa, it handles heavy positioning tasks without needing external stops.
This unit includes a magnet for CMSE and DMSE sensors, which fit into the extruded aluminum barrel's dual sensor grooves. The carbon steel rod and M27x2 thread provide robust load handling, while the PT tapered port ensures a tight pneumatic seal. It features adjustable air cushions at both ends to manage deceleration across its 30-500 mm/s speed range.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-75S |
|---|---|
| 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 SAIJ125X90-75S
| 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 SAIJ125X90-75S Is Used
Product Changeover
Quickly reconfigure the retract distance for different material lengths on a single line using the 75 mm adjustment screw.
Heavy Press Positioning
Leverage 6136 N of thrust to move heavy jigs into exact final positions, tuning out mechanical variance at commissioning.
Variable End-Stop Assembly
Set precise lower travel limits for heavy-duty assembly presses without fabricating custom external stop blocks.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-75S the Right Cylinder?
Choose this 125 mm bore when 80 mm (2513 N at 0.5 MPa) lacks the power to move your payload, or step down if 100 mm (3927 N) is sufficient. The 75 mm adjustment range is ideal for machinery that processes varying product sizes, letting operators fine-tune the retract end-position on the fly instead of swapping cylinders. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Because the rear adjuster acts strictly as a travel stop and the air cushions only manage deceleration, this cylinder cannot hold a load without live air pressure. For fail-safe load holding, consider an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder. To replace an ISO 15552 unit, match the 125 mm bore, 90 mm stroke, 75 mm adjust, PT G1/2 port, and -S magnet.
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 SAIJ125X90-75S FAQ
At 0.5 MPa it provides 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa operating pressure, it delivers up to 1251 kgf.
The rear adjuster acts as a mechanical stop that shortens the 90 mm stroke. You can trim the travel anywhere from 0 to 75 mm, yielding an effective 15 to 90 mm travel window. It only sets the end position and does not lock the load without air pressure.
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