Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 200mm 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
- Stroke200 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-50
The AirTAC SAIJ125X200-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 150-200 mm usable travel window by allowing you to trim the 200 mm nominal stroke back by up to 50 mm. This bore delivers 6136 N of pull force at 0.5 MPa, making it suited for heavy-duty positioning tasks.
Equipped with a SUS420J2 stainless steel rod (material code A) and PT tapered port threads, it handles demanding environments reliably. The extruded aluminum barrel includes sensor grooves on both sides for CMSE reed or DMSE electronic switches, though this specific SKU is specified without a magnet. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 200 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 SAIJ125AX200-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×200 | 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 SAIJ125AX200-50 Is Used
Machine Changeover
Dial in the exact retract position within the 150-200 mm window when switching product sizes on a packaging line, eliminating the need to physically swap cylinders.
Variable End-Stop Tuning
Use the rear adjusting screw to precisely set the end-of-stroke position during initial setup, compensating for mechanical tolerances without external stopper blocks.
Heavy-Duty Positioning
Leverage the 6136 N pull force to move heavy jigs or fixtures, using the adjustable stroke to fine-tune the resting location safely.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-50 the Right Cylinder?
Select this 125 mm bore when a 100 mm bore (providing 3681 N pull at 0.5 MPa) is insufficient for your load, but a 160 mm bore is oversized. Choose the SAIJ adjustable-stroke design over a fixed SAI when you need to fine-tune the retract end position during commissioning or product changeover without adding external stops. The rear adjuster acts purely as a travel stop and does not hold the load without live air; for fail-safe load holding, consider an AirTAC SAIL or BSAI cylinder. This model is dimensionally interchangeable per ISO 15552 standards, configured with a 200 mm stroke, 50 mm adjustment, PT G1/2 ports, and no 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 SAIJ125AX200-50 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of pull force and 8590 N of push force at 0.7 MPa. The maximum allowable pressure is 1.0 MPa.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 200 mm nominal stroke by up to 50 mm, providing a usable travel window of 150 to 200 mm. It only sets the travel end and does not lock the load without live air pressure.
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