Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-75 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 SAIJ125AX200-75
The AirTAC SAIJ125X200-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that allows you to trim the effective travel by up to 75 mm. This creates a usable stroke window of 125 to 200 mm, letting you dial in the retract end-position precisely during commissioning. It delivers robust thrust, generating 6136 N of pull force at 0.5 MPa and up to 11045 N of push force at 0.9 MPa.
Equipped with a SUS420J2 stainless steel rod (code A) and PT tapered ports, this 125 mm bore unit is built for demanding environments. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. Note that the rear adjuster functions strictly as a travel stop to set deceleration, not as a lock to hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-75 |
|---|---|
| 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 SAIJ125AX200-75
| 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 SAIJ125AX200-75 Is Used
Product Changeover
Quickly adapt the retract distance on packaging lines when switching to different product sizes, using the 75 mm adjustment window instead of repositioning the cylinder.
Machine Setup
Fine-tune the end-stop during initial commissioning to achieve perfect positioning, eliminating the need to bolt on external physical stops.
Variable End Stops
Handle heavy pressing or lifting tasks requiring up to 6136 N of pull force while maintaining the flexibility to alter the stroke endpoint for varied assembly processes.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-75 the Right Cylinder?
Selecting this 125 mm bore cylinder makes sense when your application requires heavy thrust and on-the-fly end-position tuning without swapping out the physical actuator. If your force requirements are lower, stepping down to a 100 mm bore yields 3681 N of pull force at 0.5 MPa, whereas stepping up to a 160 mm bore provides 9425 N of pull force. Because the nominal stroke is 200 mm, you benefit from the full 75 mm adjustment range without needing an oversized cylinder.
For an exact ISO 15552 replacement, match the 125 mm bore, 200 mm nominal stroke, 75 mm adjustment code, PT port thread, and your required mounting style. The SAIJ series supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, omitting FB, CA, CB, and CR options. If your machine requires true load-holding without continuous air pressure, consider the SAIL or BSAI series instead, as the SAIJ adjuster cannot secure a load.
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 SAIJ125AX200-75 FAQ
The rear adjuster acts as a stopper that lets you shorten the effective stroke by up to 75 mm. This provides a usable travel window of 125 to 200 mm, allowing you to fine-tune the retract position without changing the cylinder.
At 0.5 MPa, it provides 6136 N of push force and 5734 N of pull force. At 0.9 MPa, the push force increases to 11045 N, making it suitable for heavy-duty applications.
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