Airtac SAIJ125 Adjustable Cylinder SAIJ125AX160-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX160-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 160mm 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
- Stroke160 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX160-20S
The AirTAC SAIJ125X160-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 140-160 mm, allowing you to trim the nominal 160 mm stroke by up to 20 mm during commissioning. This bore size delivers 6136 N of pull force at 0.5 MPa, making it suitable for heavy-duty positioning tasks.
This configuration includes a SUS420J2 stainless steel rod for corrosion resistance and a magnet for position sensing with CMSE reed or DMSE electronic switches. The extruded aluminum barrel includes sensor grooves on both sides. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX160-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX160-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 160 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 SAIJ125AX160-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×160 | 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 SAIJ125AX160-20S Is Used
Heavy Press Setup
Dial in the exact clamping end-position on heavy assemblies, using the 20 mm adjuster to fine-tune the 160 mm stroke without swapping hardware.
Product Changeover
Adapt diverter stroke lengths quickly on packaging lines when product sizes change, utilizing the 140-160 mm travel window for rapid setup.
Machine Commissioning
Trim the effective travel window during initial machine commissioning to prevent mechanical interference, avoiding the need for custom spacers.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX160-20S the Right Cylinder?
Choose this 125 mm bore when 80 mm (2268 N pull at 0.5 MPa) is insufficient but 160 mm (9425 N pull at 0.5 MPa) would be excessive. The adjustable rear stopper is ideal for machine setups requiring variable end positions without adding external stops. The PT tapered ports and M27x2 rod thread handle high flow and side loads well.
Remember that the rear adjuster is a travel stop, not a lock; it cannot hold the load without live air. For fail-safe load holding, select an SAIL or BSAI cylinder. The 160 mm stroke is short enough to not require external guides, but always ensure the load is supported on longer strokes. This model is dimensionally interchangeable per ISO 15552.
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 SAIJ125AX160-20S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of pull force and 8590 N of push force. At the maximum 1.0 MPa pressure, it delivers up to 1251 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective stroke from 160 mm down to 140 mm. It sets the travel end and relies on the air cushion for deceleration, but it does not lock or hold the load without live air pressure.
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