Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 600mm 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
- Stroke600 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-40
The AirTAC SAIJ125X600-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a usable travel window of 560 to 600 mm. It delivers 6133 N of thrust at 0.5 MPa and up to 11045 N at 0.9 MPa, making it suited for heavy-duty positioning tasks.
This model uses a robust 32 mm carbon steel rod with an M27x2 thread to manage high side loads, while the extruded aluminum barrel incorporates sensor grooves on both sides for flexible switch mounting. The rear stopper allows precise end-position tuning during commissioning without adding external stops, though it functions strictly as a travel stop and will not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 600 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 SAIJ125X600-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×600 | 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 SAIJ125X600-40 Is Used
Product Changeover Systems
Dial in the 560-600 mm travel window during format size changes on packaging lines without physically swapping the cylinder.
Heavy-Duty Pressing
Leverage the 11045 N output at 0.9 MPa to securely seat or form components, fine-tuning the final contact position via the rear screw.
Automated Assembly Stops
Set precise retract end-positions for large fixtures, relying on the 32 mm rod to maintain stability under heavy tooling weights.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-40 the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (providing 3927 N at 0.5 MPa) is insufficient and a 160 mm bore (10053 N at 0.5 MPa) is oversized for your force requirements. The adjustable 560-600 mm travel window is ideal for production lines that require variable end-stops during product changeovers, eliminating the need to physically swap out a fixed-stroke SAI cylinder.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 600 mm stroke, 40 mm adjustment, PT tapered port thread, and the SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the 600 mm stroke is substantial, always use an external guide to prevent rod sagging and premature seal wear. For load-holding without live air, select a SAIL or BSAI cylinder instead.
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 SAIJ125X600-40 FAQ
At 0.5 MPa it provides 6136 N of push force and 5734 N of pull force. At 0.9 MPa, the push force increases to 11045 N.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective travel from 600 mm down to 560 mm. It only sets the end position and does not lock or hold the load without continuous air pressure.
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