Airtac SAIJ125 Adjustable Cylinder SAIJ125X30-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X30-30 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 SAIJ125X30-30
The AirTAC SAIJ125X30-30 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5MPa. It features a PT tapered port and a 32mm carbon steel rod. The integrated adjustment mechanism allows the 30mm nominal stroke to be dialed back by up to 30mm, providing a 0-30mm usable travel window for exact end-position tuning.
This adjuster functions strictly as a mechanical stop to set the travel end and works alongside the variable air cushions at both ends; it is not a lock and requires live air to maintain position. The extruded aluminum barrel includes sensor grooves on both sides for CMSE reed or DMSE electronic switches, though this specific configuration omits the magnet. Mounting options are restricted to Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X30-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X30-30 |
|---|---|
| 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 SAIJ125X30-30
| 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 SAIJ125X30-30 Is Used
Variable End Stops
Dial in the exact 0-30mm retract position during commissioning to meet precise spacing requirements without external shims.
Machine Setup
Fine-tune the end-of-stroke position on tooling plates, utilizing the 6136N thrust to seat components accurately.
Product Changeover
Adjust the travel window quickly on the line when switching product sizes, minimizing downtime and avoiding cylinder swaps.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X30-30 the Right Cylinder?
Choose this 125mm bore when an 80mm bore (2513N push at 0.5MPa) cannot supply enough thrust, but a 160mm bore (10053N) would be excessive. The adjustable stroke is ideal for machine setup and changeover, allowing you to fine-tune the 0-30mm travel window without swapping cylinders or adding external stops, unlike a fixed-stroke SAI model. Because the plain SAIJ lacks live-air load holding, use a SAIL or BSAI cylinder if the load must be held without continuous pressure. For a direct ISO 15552 replacement match, specify the 125mm bore, 30mm stroke, 30mm adjustment, PT port, and the desired mounting kit.
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 SAIJ125X30-30 FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. It can reach up to 11045N push force at 0.9MPa.
The rear adjuster acts as a mechanical stop that trims the 30mm nominal stroke back by up to 30mm, creating a 0-30mm usable travel window. It sets the end position but does not lock the load without live air pressure.
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