Airtac SAIJ125 Adjustable Cylinder SAIJ125X195-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X195-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 195mm 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
- Stroke195 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X195-50S
The AirTAC SAIJ125X195-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push force at 0.5 MPa and features a 50mm adjustment range, creating a usable travel window between 145 and 195mm. This allows precise end-position tuning during commissioning without swapping out the entire unit. The extruded aluminum barrel includes sensor grooves on both sides, and the -S suffix means it contains a magnet for use with AirTAC CMSE reed and DMSE electronic solid-state switches.
This model uses a carbon steel piston rod with an M27x2 thread and a G1/2 port. It incorporates adjustable air cushions at both ends to manage deceleration, though the rear mechanical stopper and cushions only set the travel end and do not hold the load without live air. For load-holding requirements without continuous pneumatic pressure, consider the SAIL or BSAI variants. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X195-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X195-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 195 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 SAIJ125X195-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×195 | 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 SAIJ125X195-50S Is Used
Product Changeover
Dial in the 145-195mm travel window on the fly to accommodate different product lengths on a packaging line without changing cylinders.
Machine Setup
Fine-tune the retract end-position during commissioning to achieve exact tooling alignment, utilizing the 50mm rear stopper adjustment.
Variable End Stops
Ideal for heavy-duty pressing or lifting tasks where the final lower position needs occasional mechanical adjustment without external stops.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X195-50S the Right Cylinder?
Selecting this 125mm bore cylinder makes sense when your application requires the 6136N thrust at 0.5 MPa but demands flexibility in the final end-stop position, offering a 145-195mm adjustable window. If you need less force, stepping down to an 80mm bore provides 2513N push force, while moving up to a 160mm bore yields 10053N. The adjustable stroke is chosen over a fixed SAI model to fine-tune retract positions during machine setup or product changeovers. Because the 195mm stroke is under 300mm, side-load risks are moderate, but the robust 32mm rod still requires alignment. To match this ISO 15552 dimensionally interchangeable cylinder, confirm the 195mm stroke, 50mm adjustment, PT tapered port threads, and the -S magnet option.
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 SAIJ125X195-50S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. It can reach a maximum push force of 11045N at 0.9 MPa.
The rear adjuster acts as a mechanical stop, allowing you to shorten the effective stroke from the nominal 195mm down to 145mm. This creates a 145-195mm usable travel window for fine-tuning the end position without replacing the cylinder.
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