Airtac SAIJ125 Adjustable Cylinder SAIJ125X50-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X50-10 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 SAIJ125X50-10
The AirTAC SAIJ125X50-10 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. Its 50mm nominal stroke can be dialed back by up to 10mm, creating a precise 40-50mm usable travel window for fine end-position tuning. This eliminates the need to swap cylinders or bolt on external stops during machine commissioning.
This bore features a 32mm carbon steel piston rod and a PT tapered G1/2 port. The rear adjuster acts strictly as a travel stop for deceleration and positioning, not a load-holding lock. For applications requiring the load to be held without live air pressure, an external rod lock or related types like the SAIL or BSAI cylinders are required.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X50-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X50-10 |
|---|---|
| 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 SAIJ125X50-10
| 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 SAIJ125X50-10 Is Used
Press Fit Tuning
Dial in the exact 40-50mm insertion depth for heavy press-fit operations without changing physical hard stops.
Machine Changeover
Quickly adjust the rear stopper by up to 10mm to accommodate new product sizes on a high-force assembly line.
Heavy Clamping
Secure large workpieces with up to 6136N of force while fine-tuning the clamping reach at the machine setup phase.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X50-10 the Right Cylinder?
Selecting this 125mm bore makes sense when your application requires the 6136N push force at 0.5 MPa, stepping up from a 100mm bore that provides 3927N. The adjustable 40-50mm window is ideal for setups requiring exact end-stop tuning without mechanical rework. When specifying an ISO 15552 replacement match, confirm the 50mm stroke, 10mm adjustment, PT port thread, and mounting style.
Mounting options for this series include Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR configurations. Because this is a non-magnet variant, it does not support position sensing; adding an -S magnet would be required to use AirTAC CMSE reed or DMSE electronic solid-state sensors in the dual-side barrel grooves.
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 SAIJ125X50-10 FAQ
It features a rear mechanical stopper that allows you to shorten the 50mm nominal stroke by up to 10mm, providing an effective and adjustable travel window of 40 to 50mm.
At 0.5 MPa operating pressure, it provides 6136N of push force and 5734N of pull force. It can reach a maximum push force of 11045N at 0.9 MPa.
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Standard models usually ship in 3-4 days.
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