Airtac SAIJ40 Adjustable Cylinder SAIJ40BX125-10S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX125-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 125mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke125 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX125-10S
The AirTAC SAIJ40X125-10-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a usable travel window of 115 to 125 mm, allowing you to dial back the nominal 125 mm stroke by up to 10 mm during machine commissioning. Delivering 628 N of push force at 0.5 MPa, it is built with a SUS304 stainless steel rod and a PT tapered port.
This configuration includes a piston magnet for position sensing with CMSE reed and DMSE electronic switches. The extruded aluminum barrel features sensor grooves on both sides, and the mounting set omits FB, CA, CB, and CR brackets, focusing on Basic, FA, LB, TC, FTC, TCM1, and TCM2 options.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX125-10S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX125-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40BX125-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×125 | 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 SAIJ40 Adjustable Cylinder SAIJ40BX125-10S Is Used
Machine Commissioning
Dial in the exact 115-125 mm end-stop during initial setup to perfect product placement without machining custom spacers.
Product Changeover
Quickly adapt the stroke window on a packaging line when switching to a slightly shorter product format.
End-Position Trimming
Trim back the travel by up to 10 mm to compensate for mechanical wear or minor misalignment over time.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX125-10S the Right Cylinder?
Choose this 40 mm bore when you need more force than the 32 mm version (402 N at 0.5 MPa) but want a more compact footprint than the 50 mm bore (982 N). The 10 mm rear adjuster is ideal for fine-tuning the end-of-stroke position without adding external stoppers or swapping the cylinder. For applications requiring a fixed travel length, the standard SAI cylinder is a simpler alternative.
Remember that the rear adjuster acts only as a travel stop, not a lock; the SAIJ40X125-10-S cannot hold a load without continuous air pressure. For load-holding requirements, consider the SAIL or BSAI series. The 125 mm stroke is well within standard limits, so side-loading is minimal, though the 16 mm rod and M12x1.25 thread still benefit from guided loads.
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 SAIJ40 Adjustable Cylinder SAIJ40BX125-10S FAQ
At a 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
The rear adjuster screw allows you to shorten the effective stroke from 125 mm down to 115 mm. This creates a 10 mm adjustable window for fine-tuning the retract end position without replacing the cylinder.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac SAIJ40 Adjustable Cylinder SAIJ40BX125-10S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.