Airtac SAIJ125 Adjustable Cylinder SAIJ125AX195-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX195-20S 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 SAIJ125AX195-20S
The AirTAC SAIJ125X195-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5MPa. Its 195mm nominal stroke can be fine-tuned down by up to 20mm, creating a precise 175-195mm usable travel window for product changeovers. The extruded aluminum barrel features sensor grooves on both sides, and this -S variant includes a magnet for direct compatibility with AirTAC CMSE reed and DMSE electronic solid-state switches.
This model utilizes a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and features PT tapered port threads. Unlike a fixed-stroke SAI cylinder, the rear mechanical stopper allows you to dial in the exact retract end-position during commissioning without adding external stops. Note that this adjuster acts strictly as a travel stop and does not lock the load; for position holding without live air pressure, consider an AirTAC SAIL or BSAI series cylinder.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX195-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX195-20S |
|---|---|
| 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 SAIJ125AX195-20S
| 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 SAIJ125AX195-20S Is Used
Product Size Changeovers
Dial in the 175-195mm travel window during format changes on packaging lines, using the rear adjuster to accommodate different carton sizes without swapping cylinders.
End-Position Tuning
Fine-tune the retract stroke during machine commissioning to achieve exact material feeding positions, preventing mechanical crashes without adding external hard stops.
Heavy-Duty Forming
Leverage the 6136N push force at 0.5MPa for pressing and forming tasks, using the adjustable stop to set precise engagement depths for various workpieces.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX195-20S the Right Cylinder?
Selecting this 125mm bore cylinder makes sense when your application requires heavy thrust (6136N push at 0.5MPa, up to 11045N at 0.9MPa) alongside variable end-stop positioning. If you need less force, stepping down to a 100mm bore yields 3927N at 0.5MPa; if you need more, a 160mm bore provides 10053N. Because the 195mm stroke is below the 300mm side-load threshold, the robust 32mm rod handles standard loads well, though long unsupported strokes still require external guidance.
To match this exact ISO 15552 interchangeable footprint for a replacement, confirm the following: 125mm bore, 195mm stroke, 20mm adjustment range, PT port threads, and the -S magnet option. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets.
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 SAIJ125AX195-20S FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.9MPa, the push force increases to 11045N.
The rear adjuster acts as a mechanical stop that lets you shorten the 195mm nominal stroke by up to 20mm, providing a usable travel window of 175-195mm. It sets the end position but does not lock the load without live air pressure.
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