Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-20S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 105mm 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
- Stroke105 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-20S
The AirTAC SAIJ40X105-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing an 85 to 105 mm usable travel window for precise end-position tuning. Delivering 628 N of push force at 0.5 MPa, it handles medium-duty positioning tasks efficiently. The SUS304 stainless steel rod offers superior corrosion resistance, while the integrated magnet enables seamless position feedback.
This adjustable-stroke model utilizes PT tapered port threads (G1/4) and operates at speeds between 30 and 800 mm/s. It features variable air cushions at both ends to decelerate the load smoothly. The rear stopper screw allows you to dial in the exact retract distance during commissioning without adding external stops, making it highly effective for lines running multiple product sizes.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-20S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 105 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 SAIJ40BX105-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×105 | 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 SAIJ40BX105-20S Is Used
Product Changeovers
Dial in the 85-105 mm travel window during format changes on packaging lines, allowing rapid size adjustments without swapping cylinders.
End-Stop Calibration
Fine-tune the retract position during machine commissioning to achieve precise tooling alignment, using the rear stopper instead of external shims.
Sensor-Driven Positioning
Leverage the integrated -S magnet with CMSE reed or DMSE electronic sensors to confirm the adjusted end-of-travel position in automated assemblies.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-20S the Right Cylinder?
Select this 40 mm bore cylinder when an application requires 628 N of push force at 0.5 MPa, stepping up from a 32 mm bore (402 N) for heavier tooling, or down from a 50 mm bore (982 N) to save space. The 20 mm adjustment window is ideal for machine setups requiring variable end stops during product changeovers, avoiding the need to physically swap out a fixed-stroke SAI cylinder.
Because this is a 105 mm stroke configuration, standard mounting is straightforward, but always support long loads to prevent rod side-loading. Remember that the rear adjuster acts only as a travel stop, not a lock; the SAIJ40X105-20-S will not hold its position without live air. For load-holding requirements, consider an AirTAC SAIL or BSAI cylinder. To match this ISO 15552 interchangeable unit, specify: 40 mm bore, 105 mm stroke, -20 mm adjustment, PT G1/4 port, SUS304 (B) rod, and the -S magnet option.
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 SAIJ40BX105-20S FAQ
The rear adjuster screw allows you to shorten the effective stroke by up to 20 mm, creating an 85 to 105 mm usable travel window. It acts as a mechanical stop to fine-tune the retract position without changing the cylinder.
At 0.5 MPa operating pressure, it provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
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 SAIJ40BX105-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.