Airtac SAIJ125 Adjustable Cylinder SAIJ125AX30-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX30-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 30mm 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
- Stroke30 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX30-10S
The AirTAC SAIJ125X30-10-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 20 to 30 mm, allowing you to dial back the 30 mm nominal stroke by up to 10 mm during commissioning. It delivers a robust 6133 N push force at 0.5 MPa, making it ideal for heavy-duty short-stroke tasks.
This variant includes a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel features sensor grooves on both sides, and because it carries the -S magnet, it is fully compatible with AirTAC CMSE reed and DMSE electronic solid-state sensors. The mounting set covers Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX30-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX30-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 30 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 SAIJ125AX30-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×30 | 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 SAIJ125AX30-10S Is Used
Press Fit Tuning
Dial in the exact 20-30 mm travel window during press fit commissioning to accommodate slight material thickness variations without swapping cylinders.
Product Changeover
Rapidly adjust the end-stop position on a packaging line when switching to a different product size, utilizing the 10 mm rear adjustment range.
Heavy-Duty Clamping
Leverage the 6133 N push force at 0.5 MPa for secure clamping of heavy workpieces, fine-tuning the travel to prevent workpiece deformation.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX30-10S the Right Cylinder?
Select this 125 mm bore when your application requires substantial force—stepping down to an 80 mm bore drops the 0.5 MPa push force to 2513 N, while this size provides 6133 N. The adjustable stroke is chosen over a fixed SAI cylinder when you need precise mechanical end-position tuning at machine setup or during product changeover without adding external stops. For strokes of 30 mm, side-loading is minimal, but always ensure the load is guided to prevent rod binding.
When specifying a replacement, match the 125 mm bore, 30 mm stroke, 10 mm adjustment range, PT port threads, and the -S magnet requirement. Remember that the rear adjuster acts only as a travel stop to set deceleration; it does not hold the load without live air. For true load-holding without pneumatic pressure, consider the SAIL or BSAI cylinder 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 SAIJ125AX30-10S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6133 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw acts as a mechanical stop that shortens the effective stroke. For this SAIJ125X30-10-S model, the 30 mm nominal stroke can be dialed back by up to 10 mm, resulting in a usable travel window of 20 to 30 mm. It does not lock the load without live air pressure.
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