Airtac SAIJ125 Adjustable Cylinder SAIJ125BX40-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX40-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 40mm 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
- Stroke40 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 SAIJ125BX40-10S
The AirTAC SAIJ125X40-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 30 to 40 mm. It delivers a robust 6136 N push force at 0.5 MPa, making it suitable for heavy-duty positioning tasks. The piston rod is constructed from SUS304 stainless steel, offering high corrosion resistance for harsh environments.
This model includes a standard magnet for position sensing, compatible with AirTAC CMSE reed and DMSE electronic switches mounted in the dual-side sensor grooves. The rear adjuster functions strictly as a mechanical stop to fine-tune the end position during commissioning without adding external stops; it does not lock the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX40-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX40-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 40 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 SAIJ125BX40-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×40 | 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 SAIJ125BX40-10S Is Used
Product Changeover
Dial in the exact 30 to 40 mm end-stop during production line changeovers to accommodate slightly different package sizes without swapping cylinders.
End-Position Tuning
Fine-tune the retract stroke at commissioning using the rear screw, ensuring precise mechanical alignment without adding bulky external stoppers.
Heavy-Duty Clamping
Leverage the 6136 N push force to secure heavy workpieces, using the short stroke adjustment to set the exact clamping depth.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX40-10S the Right Cylinder?
Choose this 125 mm bore when you need substantial thrust (6136 N at 0.5 MPa) over a short distance, stepping up from a 100 mm bore that provides 3927 N. The 10 mm adjustment range is ideal for dialing in precise end-of-stroke positions during machine setup or product changeover, rather than relying on a fixed-stroke SAI cylinder. For load-holding without continuous air pressure, consider the SAIL or BSAI series instead, as this adjuster only acts as a travel stop.
This configuration features PT tapered ports and a SUS304 stainless steel rod. Even with a short 40 mm stroke, the M27x2 rod thread handles high side loads, though external guides are always recommended for lateral forces. It is dimensionally interchangeable per ISO 15552 and supports mountings Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125BX40-10S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides a push force of 6136 N and a pull force of 5734 N. It can deliver up to 1251 kgf at its maximum 1.0 MPa pressure.
The rear adjuster acts as a mechanical stop that lets you shorten the nominal 40 mm stroke by up to 10 mm, creating a 30 to 40 mm usable travel window. It only sets the travel end and does not hold the load without live air pressure.
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Standard models are processed and dispatched in 3-5 business days.
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