Airtac SAIJ125 Adjustable Cylinder SAIJ125X160-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X160-40S 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 SAIJ125X160-40S
The AirTAC SAIJ125X160-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136 N push force at 0.5 MPa. It features a carbon steel rod and a PT tapered port. Because of the 40 mm adjustment code, the effective travel window can be fine-tuned anywhere between 120 mm and 160 mm without swapping the cylinder.
This adjuster acts purely as a mechanical stop for end-position tuning during commissioning or product changeovers, not as a lock. The extruded aluminum barrel includes sensor grooves on both sides, and the -S magnet directly supports AirTAC CMSE reed and DMSE electronic solid-state switches for precise position detection.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X160-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X160-40S |
|---|---|
| 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 SAIJ125X160-40S
| 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 SAIJ125X160-40S Is Used
Product Size Changeovers
Dial in the 120-160 mm travel window during format changes on packaging lines, avoiding the need to physically swap cylinders for different product lengths.
Variable End Stops
Set precise retract positions at the machine commissioning phase using the rear stopper, allowing on-the-fly tweaks without bolting on external stops.
Heavy Assembly Positioning
Leverage the 6136 N push force at 0.5 MPa to move heavy pallets or fixtures, tuning the final end position to perfectly meet the assembly tooling.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X160-40S the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (offering 3927 N push at 0.5 MPa) lacks the necessary thrust, but a 160 mm bore is oversized. The 40 mm adjustment window is ideal for variable end stops and machine setups, replacing the need for fixed-stroke SAI cylinders when product sizes change on a line. To match this ISO 15552 replacement exactly, specify the 125 mm bore, 160 mm stroke, PT port, and the -S magnet.
Although the 32 mm rod and M27x2 thread handle substantial loads, any stroke of 300 mm or more requires external guiding to prevent side-loading. Remember that the rear adjuster does not hold the load without live air; for pilot-operated load holding, consider the SAIL or BSAI series 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 SAIJ125X160-40S FAQ
At 0.5 MPa it provides 6136 N of push force and 5734 N of pull force. If higher pressure is available, it delivers 8590 N push at 0.7 MPa and 11045 N push at 0.9 MPa.
The rear adjuster screw lets you mechanically shorten the 160 mm nominal stroke by up to 40 mm, providing a usable travel window of 120 to 160 mm. It functions as a travel stop for end-position tuning, not a load-holding lock.
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