Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 145mm 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
- Stroke145 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-30
The AirTAC SAIJ125X145-30 is a double-acting, single-rod profile cylinder conforming to ISO 15552 dimensional interchangeability. It features a rear-mounted stroke adjuster that allows the 145mm nominal stroke to be dialed back by up to 30mm, creating a usable travel window of 115-145mm. This built-in adjustability simplifies commissioning fine-tuning and product changeovers without requiring external stops or cylinder swaps.
Delivering 6136N of push force and 5734N of pull force at 0.5MPa, this 125mm bore cylinder is engineered for heavy-duty positioning. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed and DMSE electronic switches. A carbon steel piston rod with an M27x2 thread provides high tensile strength, while the PT tapered port threads ensure a robust, leak-free pneumatic connection.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 145 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 SAIJ125X145-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×145 | 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 SAIJ125X145-30 Is Used
Product Changeover Stops
Quickly dial the rear adjuster to shift the 115-145mm travel window when adapting machinery for different product lengths on the fly.
Heavy-Duty Pressing
Leverage the 6136N push force at 0.5MPa for assembling large components, utilizing the adjustable stop to set precise final positioning depth.
Commissioning Calibration
Fine-tune the end-of-stroke position during initial machine setup without fabricating custom spacer blocks or changing the cylinder.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-30 the Right Cylinder?
Select this 125mm bore model when an application requires substantial thrust—stepping down to a 100mm bore reduces the 0.5MPa push force to 3927N, whereas stepping up to a 160mm bore yields 10053N. The SAIJ125X145-30 is chosen over a fixed-stroke SAI cylinder when a machine requires variable end-stops to accommodate multiple product sizes on a single line. To match this cylinder for an ISO 15552 replacement, specify the 125mm bore, 145mm stroke, 30mm adjustment range, PT port threads, carbon steel rod, and no magnet.
Because the stroke is 145mm, which is below the 300mm threshold requiring external guidance, the robust M27x2 rod handles standard loads effectively. Remember that the rear adjuster functions purely as a travel stop and does not hold the load without live air pressure; for fail-safe load holding, consider an AirTAC SAIL or BSAI cylinder.
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 SAIJ125X145-30 FAQ
At a 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At the maximum 1.0MPa pressure, it delivers 1251kgf of push force.
A rear-mounted external screw acts as a mechanical stop, allowing you to shorten the 145mm nominal stroke by up to 30mm. This creates an adjustable travel window of 115-145mm, enabling precise end-position tuning without replacing the cylinder.
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