Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-20S 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 SAIJ125AX200-20S
The AirTAC SAIJ125X200-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 6136N push force at 0.5MPa and features a 180-200mm usable travel window, allowing you to trim the nominal 200mm stroke by up to 20mm during machine setup. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated magnet (-S) supports electronic DMSE or reed CMSE switches for exact position detection.
This variant utilizes a SUS420J2 stainless steel rod (material code A) for improved corrosion resistance and pairs with PT tapered port threads. The rear adjuster functions strictly as a mechanical stop to fine-tune the end position, working alongside the standard air cushions to decelerate the load. It does not lock or hold the load without continuous air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-20S |
|---|---|
| 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 SAIJ125AX200-20S
| 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 SAIJ125AX200-20S Is Used
Product Changeover
Dial in the 180-200mm travel window during format changes on packaging lines without replacing the cylinder or adding external stops.
Heavy Press Fit
Leverage 6136N of push force at 0.5MPa for heavy assembly operations while fine-tuning the exact end position at commissioning.
Machine Setup
Use the rear adjuster to precisely set the retraction point on large material handling equipment during initial mechanical calibration.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-20S the Right Cylinder?
Choose this 125mm bore when an 80mm cylinder (providing 2513N push at 0.5MPa) lacks the thrust for heavy actuation, but a 160mm bore (10053N) would be excessive. The adjustable stroke is ideal for product changeovers, letting you dial in the 180-200mm travel window without swapping hardware. For load-holding without live air pressure, select a SAIL or BSAI cylinder, as the SAIJ adjuster is only a travel stop. To match this ISO 15552 footprint, specify the 125mm bore, 200mm stroke, -20mm adjustment, PT G1/2 port, and the -S magnet.
With a 200mm stroke, the 32mm diameter rod handles standard loads well, but long unsupported strokes require an external guide to prevent side-loading. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2, 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 SAIJ125AX200-20S FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7MPa, the push force increases to 8590N.
The rear mechanical stopper allows you to shorten the effective travel from the nominal 200mm down to 180mm. This creates a 180-200mm adjustable window for fine-tuning the end position without changing the cylinder.
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