Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-100S 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 SAIJ125AX145-100S
The AirTAC SAIJ125X145-100-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136 N of push force at 0.5 MPa. Its 145 mm nominal stroke can be dialed back by up to 100 mm, creating a highly flexible 45-145 mm usable travel window for precise end-position tuning during machine commissioning. This wide adjustment range is ideal for machinery requiring frequent product-size changeovers without swapping the entire actuator.
Built with a SUS420J2 stainless steel rod (code A) for superior corrosion resistance, this model includes a magnet (-S) for position sensing and features PT tapered port threads. The extruded aluminum barrel incorporates sensor grooves on both sides, supporting AirTAC CMSE reed and DMSE electronic solid-state switches. It operates at speeds of 30-500 mm/s and relies on adjustable air cushions at both ends to decelerate heavy loads smoothly.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-100S |
|---|---|
| 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 SAIJ125AX145-100S
| 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 SAIJ125AX145-100S Is Used
Variable Product Changeover
Ideal for packaging lines that process different container sizes, using the 100 mm adjustment window to rapidly reconfigure the 45-145 mm stroke without replacing the actuator.
Commissioning End-Stop Tuning
Allows maintenance teams to fine-tune the exact retract position during machine setup, dialing in the rear stopper screw to perfect the mechanical timing without adding external stops.
Heavy-Duty Clamping Fixtures
Provides 6136 N of clamping force at 0.5 MPa for holding large workpieces, while the SUS420J2 stainless rod resists corrosion in harsh industrial environments.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-100S the Right Cylinder?
Select this 125 mm bore actuator when an application demands high thrust (6136 N push at 0.5 MPa) alongside highly variable end-stops. If your setup requires less force, stepping down to a 100 mm bore yields 3927 N, whereas upgrading to a 160 mm bore provides 10053 N. Choose the SAIJ adjustable format over a fixed-stroke SAI cylinder when you need on-the-fly mechanical stop tuning to accommodate varying part lengths on a single line.
For ISO 15552 replacement matching, verify the 125 mm bore, 145 mm stroke, 100 mm adjustment range, PT port threads, and the -S magnet option. Mounting is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2 interfaces (omitting FB, CA, CB, and CR). Because the stroke is 145 mm, side-load risks are moderate, but external guides should still be evaluated for heavy lateral loads. Note that the rear adjuster acts strictly as a travel stop and does not hold the load without live air; for true load-holding without pressure, 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 SAIJ125AX145-100S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 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 allows you to shorten the 145 mm nominal stroke by up to 100 mm, providing an effective travel window of 45 to 145 mm. The adjuster functions as a mechanical stop to set the end position and does not lock the load without continuous air pressure.
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