Airtac SAIJ125 Adjustable Cylinder SAIJ125BX270-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX270-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 270mm 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
- Stroke270 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX270-75
The AirTAC SAIJ125X270-75 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 195 to 270 mm. Delivering 6136 N of push force at 0.5 MPa (8590 N at 0.7 MPa), it provides robust actuation for heavy-duty tooling. The standard extruded aluminum barrel features sensor grooves on both sides, though position detection requires adding a magnet.
This specific SKU utilizes a SUS304 stainless steel rod (code B) for superior corrosion resistance and features PT tapered port threads. The rear adjuster acts purely as a mechanical stop to fine-tune the retract position during commissioning or product changeover; it does not hold the load without continuous air pressure. For load-holding requirements without live air, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX270-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX270-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 270 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 SAIJ125BX270-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×270 | 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 SAIJ125BX270-75 Is Used
Product Changeover
Dial in new end positions for varying package sizes on a packaging line without replacing the actuator.
Machine Setup
Fine-tune the retract stroke during commissioning to achieve exact tooling alignment.
Heavy Forming
Provide robust push force for pressing and forming operations requiring precise end-stop control.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX270-75 the Right Cylinder?
Choose this 125 mm bore when an application demands heavy thrust that exceeds the 3927 N push force of a 100 mm cylinder at 0.5 MPa, but falls well below the 10053 N capacity of a 160 mm unit. The 75 mm adjustment range is particularly valuable on automated lines where product size changes require shifting the end-of-stroke position without physically swapping out the cylinder or adding external stopper blocks.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 270 mm stroke, PT port threads, and the specific mounting accessory from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the stroke is 270 mm, ensure adequate side-load support by guiding the load externally to prevent excessive radial stress on the 32 mm rod and M27x2 rod thread. Operating speed is rated at 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 SAIJ125BX270-75 FAQ
The rear adjuster is a mechanical stop that allows you to shorten the effective stroke by up to 75 mm, creating a usable travel window of 195 to 270 mm. It sets the end position but does not lock or hold the load without live air pressure.
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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