Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 185mm 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
- Stroke185 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-10S
The AirTAC SAIJ125X185-10-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 175-185 mm, letting you dial in the exact end position during commissioning without adding external stops. Operating at 0.5 MPa, it delivers 6136 N of push force and 5734 N of pull force.
This -S variant includes a magnet for position sensing via AirTAC CMSE reed and DMSE electronic switches, which mount directly into the dual-side sensor grooves on the extruded aluminum barrel. The robust 32 mm carbon steel rod and M27x2 thread handle significant side loads, while the PT tapered port ensures a tight pneumatic seal.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 185 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 SAIJ125X185-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×185 | 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 SAIJ125X185-10S Is Used
Product Changeovers
Dial in the 175-185 mm travel window during line format changes to accommodate slightly different product sizes without physically swapping the cylinder.
Heavy Pressing
Leverage the 6136 N push force at 0.5 MPa for heavy-duty pressing and forming tasks that require precise end-of-stroke positioning.
Machine Setup
Fine-tune the retract end position during initial commissioning using the rear adjuster, avoiding the need to machine custom external stoppers.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-10S the Right Cylinder?
Choose this 125 mm bore when your application requires heavy thrust—stepping down to a 100 mm bore drops the 0.5 MPa push force to 3927 N, whereas this model provides 6136 N. The 10 mm adjustable range is ideal for fine-tuning product changeovers on a line, whereas a fixed-stroke SAI cylinder locks you into a single 185 mm end position. For holding loads safely without live air pressure, note that this rear adjuster acts only as a travel stop; you must integrate an external rod lock or select a BSAI clamp-lock cylinder instead.
Because the 185 mm stroke is under the 300 mm side-load threshold, standard mounting is less critical, but always support long unsupported loads. This SKU uses PT tapered ports and the reduced SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2. It omits FB, CA, CB, and CR mounts, making it dimensionally interchangeable with ISO 15552 cylinders without needing a tie-rod architecture.
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 SAIJ125X185-10S FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can reach a maximum thrust of 1251 kgf at 1.0 MPa.
The rear adjusting screw acts as a mechanical stop that lets you shorten the effective travel from 185 mm down to 175 mm. This creates a 10 mm tuning window for precise end-position calibration without changing the cylinder itself.
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