Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 230mm 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
- Stroke230 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-50S
The AirTAC SAIJ125X230-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 180 to 230 mm. Delivering 6136 N of push force at 0.5 MPa, it handles heavy positioning tasks with precision. The carbon steel rod and M27x2 thread provide robust resistance to side loads, while the extruded aluminum barrel features sensor grooves on both sides for flexible mounting.
This unit includes a -S magnet for position sensing via AirTAC CMSE reed or DMSE electronic switches. The rear stopper allows fine end-position tuning during commissioning without adding external stops, but it acts only as a travel limiter and does not hold the load without live air. For secure load-holding, a SAIL or BSAI series cylinder is required.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 230 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 SAIJ125X230-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×230 | 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 SAIJ125X230-50S Is Used
Multi-Product Machining
Dial the rear stopper back by up to 50 mm to accommodate different part lengths on the same fixture without swapping out the entire cylinder.
Heavy Press Positioning
Leverage 6136 N of thrust at 0.5 MPa to move heavy jigs into place, using the adjustable end-stop to fine-tune the final contact position.
Automated Changeover
Speed up machine setup between production runs by setting the exact 180 to 230 mm travel window via the rear screw rather than adding mechanical shims.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-50S the Right Cylinder?
Choose this 125 mm bore when the 80 mm class (2513 N at 0.5 MPa) is insufficient for your tooling weight. The 50 mm adjustment range is ideal for production lines running mixed product sizes, letting operators dial in the exact end-stop on the fly. As a double-acting cylinder, it requires continuous air pressure to maintain position; the adjuster only sets the travel end.
To replace an ISO 15552 cylinder, match the 125 mm bore, 230 mm stroke, 50 mm adjustment, PT tapered port, and the -S magnet. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Since the 230 mm stroke is under the 300 mm side-load threshold, standard mounting is adequate, though heavy off-center loads still need an external guide.
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 SAIJ125X230-50S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can reach up to 11045 N at 0.9 MPa.
The rear adjuster screw lets you shorten the nominal 230 mm stroke by up to 50 mm, creating a 180 to 230 mm usable travel window. This stopper only limits travel and does not lock the load without continuous air pressure.
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