Airtac SAIJ125 Adjustable Cylinder SAIJ125AX45-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX45-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 45mm 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
- Stroke45 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX45-10S
The AirTAC SAIJ125X45-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 35 to 45 mm. Delivering 6136 N of push force at 0.5 MPa, it handles heavy loads with precision. The extruded aluminum barrel features sensor grooves on both sides, and this -S configuration includes a magnet for position detection via AirTAC CMSE reed or DMSE electronic switches.
This model incorporates a SUS420J2 stainless steel rod (material code A) for improved corrosion resistance and features PT tapered port threads. The rear adjuster acts purely as a mechanical stop to fine-tune the retract end position without adding external stops. It does not hold the load without live air pressure; for load-holding requirements, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX45-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX45-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 45 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 SAIJ125AX45-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×45 | 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 SAIJ125AX45-10S Is Used
Press Stroke Calibration
Dial in the exact 35-45 mm travel window during machine commissioning to ensure precise pressing force without physically swapping cylinders.
Product Size Changeover
Quickly adjust the retract end-stop by up to 10 mm on automated lines when processing different product lengths or thicknesses.
Heavy Duty Positioning
Move heavy payloads with 6136 N of thrust at 0.5 MPa while using the rear screw to fine-tune the resting position for downstream operations.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX45-10S the Right Cylinder?
Select this 125 mm bore when a 63 mm bore (2182 N push at 0.5 MPa) is insufficient, but a larger 160 mm bore (14074 N at 0.5 MPa) would be overkill. The 10 mm adjustment range is ideal for dialing in exact end positions during product changeovers or machine commissioning, avoiding the need to swap out a fixed-stroke SAI cylinder. When specifying a replacement, match the 125 mm bore, 45 mm nominal stroke, 10 mm adjust, PT port thread, and -S magnet.
Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR styles. Because the stroke is short, side-loading risks are minimal, but the substantial 32 mm rod and M27x2 thread handle high forces effectively. The operating speed is 30-500 mm/s.
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 SAIJ125AX45-10S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 1251 kgf.
The rear adjusting screw acts as a mechanical stop, allowing you to shorten the effective stroke from the nominal 45 mm down to 35 mm. This creates a 35-45 mm travel window for fine-tuning without changing the cylinder, though it does not lock the load without live air.
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