Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-50S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-50S 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 SAIJ40BX105-50S
The AirTAC SAIJ40X105-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 105 mm travel by up to 50 mm. This creates a highly flexible 55 to 105 mm usable travel window, letting you fine-tune the retract end position at commissioning without swapping out the physical cylinder or adding external stops. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa.
This specific configuration features a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads with a G1/4 connection. The extruded aluminum barrel includes sensor grooves on both sides, and because this model carries the -S magnet option, it is fully compatible with AirTAC CMSE reed switches and DMSE solid-state electronic sensors for precise position feedback.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-50S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-50S |
|---|---|
| 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 SAIJ40BX105-50S
| 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 SAIJ40BX105-50S Is Used
Machine Changeover
Quickly reconfigure the retract end-stop for different product lengths without replacing the cylinder or bolting on external stops.
Commissioning Calibration
Dial in the exact 55-105 mm travel window during setup to perfect the end position and avoid mechanical crashes.
Variable Sorting Gates
Adjust the stroke on the fly to alter the gate opening size for diverting different package dimensions.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-50S the Right Cylinder?
Selecting this 40 mm bore over a 32 mm bore upgrades your thrust from 402 N to 628 N at 0.5 MPa, while stepping up to a 50 mm bore would yield 982 N. You would choose this adjustable-stroke version over a fixed SAI cylinder when a machine requires variable end-stops to handle multiple product sizes on a single line. The rear adjuster acts purely as a mechanical stop to set deceleration and travel limits; it does not hold the load without live air pressure. For secure load-holding during an air loss event, consider the SAIL or BSAI series instead.
Because the nominal stroke is 105 mm, an external guide is not strictly required for side-load management, but the M12x1.25 rod thread provides a robust mounting interface. When matching this for an ISO 15552 replacement, verify the 40 mm bore, 105 mm stroke, 50 mm adjustment, PT port thread, and the -S magnet requirement. Note that SAIJ uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits the FB, CA, CB, and CR brackets.
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 SAIJ40BX105-50S FAQ
The rear adjuster screw allows you to shorten the effective stroke by up to 50 mm. This gives the 105 mm nominal stroke a usable travel window of 55 to 105 mm, which can be fine-tuned during commissioning. The adjuster functions as a travel stop and does not lock the load without air pressure.
At 0.5 MPa operating pressure, the SAIJ40X105-50-S provides 628 N of push force and 528 N of pull force. At the maximum 1.0 MPa operating pressure, it delivers up to 128 kgf of thrust.
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