Airtac SAIJ125 Adjustable Cylinder SAIJ125X200-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X200-40 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 SAIJ125X200-40
The AirTAC SAIJ125X200-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. It features a carbon steel piston rod and a PT tapered G1/2 port. By integrating an external stopper at the rear, this 125mm bore unit allows you to fine-tune the end position without swapping out the entire cylinder.
With a 40mm adjustment range, this model transforms the fixed 200mm stroke into a 160-200mm usable travel window. This built-in adjustability simplifies machine setup and product changeovers. The extruded aluminum barrel includes sensor grooves on both sides, allowing for easy installation of CMSE or DMSE sensors if position feedback is later required.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X200-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X200-40 |
|---|---|
| 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 SAIJ125X200-40
| 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 SAIJ125X200-40 Is Used
Product Changeovers
Quickly dial in the 160-200mm travel window during format size changes on packaging lines without physically swapping cylinders.
Machine Setup
Fine-tune the retract end-position precisely at commissioning to prevent crashes, using the rear stopper rather than external shims.
Variable End Stops
Provide adjustable physical endpoints for heavy-duty pressing or lifting tasks requiring up to 6136N of thrust at 0.5 MPa.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X200-40 the Right Cylinder?
Selecting this 125mm bore cylinder makes sense when your application demands high thrust (6136N push at 0.5 MPa) alongside variable end-stop positioning. If you need less force, stepping down to a 100mm bore yields 3927N push force. Conversely, upgrading to a 160mm bore provides 10053N. The adjustable stroke is chosen over a fixed SAI cylinder when you need commissioning flexibility to dial in the exact 160-200mm travel distance without adding external stops.
When matching an ISO 15552 replacement, verify the 200mm nominal stroke, 40mm adjustment code, PT port thread, and mounting style. SAIJ supports a specific subset of mounts: Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding, consider an external rod lock or the SAIL/BSAI series.
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 SAIJ125X200-40 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder generates a push force of 6136N and a pull force of 5734N. At 0.7 MPa, the push force increases to 8590N.
The rear adjuster screw lets you shorten the effective travel from the nominal 200mm down to 160mm, creating a 160-200mm usable window. It acts as a mechanical stop to set the end position and does not lock the load without air pressure.
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