Airtac SAIJ125 Adjustable Cylinder SAIJ125X200-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X200-75S 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 SAIJ125X200-75S
The AirTAC SAIJ125X200-75-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers 6136N push and 5734N pull thrust at 0.5 MPa. The built-in rear stopper allows you to dial back the 200 mm nominal stroke by up to 75 mm, creating a 125-200 mm usable travel window for exact end-position tuning during commissioning.
This unit includes a standard carbon steel piston rod and a -S magnet for position sensing. It works seamlessly with AirTAC CMSE reed and DMSE electronic solid-state switches mounted in the dual-side sensor grooves. The extruded aluminum barrel design omits tie-rods, and the mounting set covers Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X200-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X200-75S |
|---|---|
| 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 SAIJ125X200-75S
| 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 SAIJ125X200-75S Is Used
Variable End Stops
Dial in the exact 125 to 200 mm travel distance during machine setup without physically swapping out the entire cylinder body.
Product Changeover
Quickly adapt automated line tooling to different package sizes by adjusting the rear stopper screw on the fly.
Heavy Clamping Force
Leverage 6136N of push force at 0.5 MPa for secure holding and pressing operations that require fine-tuned travel limits.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X200-75S the Right Cylinder?
Select this 125 mm bore when an application requires heavy force but also demands variable end-stops for frequent product changeovers. If you need less force, stepping down to a 100 mm bore yields 3927N push at 0.5 MPa. If your machine requires true load-holding without live air pressure, note that this rear adjuster acts only as a travel stop and not a lock; you should evaluate the SAIL or BSAI series instead.
For an exact ISO 15552 replacement match, verify the 125 mm bore, 200 mm nominal stroke, 75 mm adjustment range, PT tapered port threads, and the -S magnet option. Because this model features a 32 mm rod and M27x2 thread, it handles side loads well, but any stroke over 300 mm still requires an external guide to prevent rod binding.
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 SAIJ125X200-75S FAQ
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 200 mm nominal stroke by up to 75 mm. This creates a usable travel window of 125 to 200 mm. It only sets the travel end and does not lock the load without live air.
At 0.5 MPa operating pressure, this cylinder provides 6136N of push force and 5734N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 1251 kgf of thrust.
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Standard models usually ship in 3-4 days.
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