Airtac SAIJ125 Adjustable Cylinder SAIJ125X160-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X160-50 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 SAIJ125X160-50
The AirTAC SAIJ125X160-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the nominal 160 mm stroke back by up to 50 mm, creating a precise 110-160 mm usable travel window. Built with a robust 32 mm carbon steel rod and M27x2 rod thread, it handles heavy loads with 6136 N push force at 0.5 MPa. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of position switches.
This model uses PT tapered port threads (G1/2) and incorporates variable air cushions at both ends to manage deceleration. The rear adjuster acts purely as a mechanical stop to set the end position and does not lock the load without live air pressure. For applications requiring position holding without continuous air, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X160-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X160-50 |
|---|---|
| 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 SAIJ125X160-50
| 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 SAIJ125X160-50 Is Used
Product Changeovers
Dial in the exact end-stop position for varying package sizes on a packaging line without replacing the cylinder or bolting on external stops.
End-Position Tuning
Fine-tune the retract stroke during machine commissioning to synchronize heavy clamping forces across a multi-station fixture.
Adjustable Ejector
Set variable ejection distances for heavy parts, utilizing the 110-160 mm travel window to accommodate different die outputs.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X160-50 the Right Cylinder?
Selecting this 125 mm bore cylinder makes sense when your application requires substantial thrust—6136 N at 0.5 MPa or 8590 N at 0.7 MPa. If your force requirements are lower, stepping down to an 80 mm bore yields 2513 N at 0.5 MPa, saving space and air consumption. The adjustable stroke is ideal for machine setups requiring fine end-position tuning during commissioning or product-size changeovers without swapping the cylinder or adding external stops.
When replacing an ISO 15552 cylinder, match these exact parameters: 125 mm bore, 160 mm stroke, 50 mm adjustment range, PT G1/2 port, and the SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the 160 mm stroke is relatively short for this bore, side-loading is less critical than with longer strokes, but an external guide is still recommended for heavy offset loads.
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 SAIJ125X160-50 FAQ
This 125 mm bore cylinder provides a push force of 6136 N and a pull force of 5734 N at 0.5 MPa. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster acts as a mechanical stop, allowing you to shorten the 160 mm nominal stroke by up to 50 mm, resulting in a usable travel window of 110-160 mm. It sets the end position but does not hold the load without live air pressure.
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