Airtac SAIJ125 Adjustable Cylinder SAIJ125X50-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X50-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 50mm 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
- Stroke50 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X50-10S
The AirTAC SAIJ125X50-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 6136N push force at 0.5 MPa. The built-in -10 mm adjustment screw creates a precise 40-50 mm usable travel window, letting you dial in the retract end-position perfectly during commissioning without adding external stops. This 125 mm bore model features a carbon steel rod and a PT tapered port.
Because the rear mechanism acts purely as a travel stop and not a lock, it cannot hold a load without live air pressure. For load-holding tasks, consider the SAIL or BSAI series. This SAIJ variant includes a magnet for CMSE reed and DMSE electronic sensors, and uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB and CR brackets.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X50-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X50-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 50 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 SAIJ125X50-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×50 | 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 SAIJ125X50-10S Is Used
Changeover Calibration
Dial in the 40-50 mm travel window precisely during machine setup to accommodate varying product sizes without swapping hardware.
Heavy Pressing
Leverage the 6136N thrust at 0.5 MPa for clamping and pressing operations that require exact end-position control.
Sensor-Ready Positioning
Utilize the integrated magnet with DMSE electronic sensors for precise position feedback alongside the adjustable stroke.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X50-10S the Right Cylinder?
Select this 125 mm bore cylinder when your application requires heavy force (6136N at 0.5 MPa) but demands variable end-stops for quick product changeovers. If you need less force, stepping down to a 100 mm bore yields 3927N at 0.5 MPa, which may be sufficient and lighter. The adjustable stroke is chosen over a fixed SAI model when you need fine end-position tuning at setup rather than a locked travel length. When ordering an ISO 15552 replacement, match the 125 mm bore, 50 mm nominal stroke, 10 mm adjuster, PT port thread, and the -S magnet requirement. The 32 mm piston rod and M27x2 thread handle high side loads well, but even at a short 50 mm stroke, always ensure proper external guiding for heavy loads.
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 SAIJ125X50-10S FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore double-acting cylinder generates a push force of 6136N and a pull force of 5734N. At the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster acts as a mechanical stop that allows you to shorten the nominal 50 mm stroke by up to 10 mm, creating a 40-50 mm usable travel window. It only sets the end position and does not lock the load without air pressure.
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