Airtac SAIJ125 Adjustable Cylinder SAIJ125BX55-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX55-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 55mm 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
- Stroke55 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 SAIJ125BX55-10S
The AirTAC SAIJ125X55-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to fine-tune the end-of-travel position during commissioning. With a nominal 55 mm stroke and a 10 mm adjustment range, it provides a usable travel window of 45 to 55 mm. This means you can dial back the retract position by up to 10 mm without swapping the cylinder or adding external stops. Delivering 6136 N of push force at 0.5 MPa, it fits heavy-duty applications perfectly.
This variant features a SUS304 stainless steel rod (code B) for superior corrosion resistance and runs on PT tapered ports. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated magnet (-S) supports position sensing with AirTAC CMSE reed and DMSE electronic switches. It uses a reduced mounting interface set—Basic, FA, LB, TC, FTC, TCM1, and TCM2—omitting the FB, CA, CB, and CR options.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX55-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX55-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 55 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 SAIJ125BX55-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×55 | 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 SAIJ125BX55-10S Is Used
Product Changeover
Quickly adjust the retract distance by up to 10 mm during line format changes, accommodating slight product size variations without replacing hardware.
End-Stop Calibration
Fine-tune the exact end position during machine commissioning to perfect pressing or clamping depth, avoiding the need for external mechanical stops.
Variable Positioning
Dial in the 45 to 55 mm travel window on the fly for automated assembly lines that require precise, repeatable end-of-stroke tuning.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX55-10S the Right Cylinder?
Choose this 125 mm bore when you need substantial thrust—6136 N at 0.5 MPa or 8590 N at 0.7 MPa. If your application requires less force, stepping down to a 100 mm bore yields 3927 N at 0.5 MPa, while moving up to a 160 mm bore provides 10053 N at 0.5 MPa. The adjustable stroke is ideal for machine setups requiring variable end-stops or product changeovers, offering flexibility that a fixed-stroke SAI cannot match.
Remember that the rear adjuster acts as a travel stop, not a lock; the SAIJ125X55-10-S will not hold a load without live air pressure. For true load-holding without continuous air, consider the SAIL (air-released lock) or BSAI (clamp-lock) series. To replace an existing ISO 15552 cylinder, match the 125 mm bore, 55 mm stroke, 10 mm adjustment, PT ports, SUS304 rod, and -S magnet, ensuring your speed stays within the 30-500 mm/s range for this bore size.
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 SAIJ125BX55-10S FAQ
It features a rear adjusting screw that acts as a mechanical stop, allowing you to shorten the effective stroke by up to 10 mm. This creates a usable travel window of 45 to 55 mm, letting you fine-tune the retract position without changing the cylinder itself.
At a 0.5 MPa operating pressure, it generates 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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