Airtac SAIJ40 Adjustable Cylinder SAIJ40BX110-20S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX110-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 110mm 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
- Stroke110 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX110-20S
The AirTAC SAIJ40X110-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the nominal 110 mm travel by up to 20 mm. This creates a precise 90-110 mm usable stroke window, letting you fine-tune the retract end-position at commissioning without swapping the cylinder or adding external stops. It delivers a push force of 628 N at 0.5 MPa and a pull force of 528 N.
This -S variant includes a magnet for position sensing and uses a SUS304 stainless steel rod for superior corrosion resistance. The extruded aluminum barrel includes sensor grooves on both sides, directly compatible with AirTAC CMSE reed and DMSE electronic solid-state switches. It features a G1/4 port, M12x1.25 rod thread, and 30 mm variable air cushions at both ends to absorb kinetic energy. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX110-20S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX110-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 110 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 SAIJ40BX110-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×110 | 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 SAIJ40BX110-20S Is Used
Machine Changeover
Dial in the 90-110 mm retract position during product size transitions without machining new hard stops.
Commissioning Setup
Fine-tune the end-of-stroke position during initial machine build to perfect timing and avoid mechanical interference.
Variable End Stops
Adjust the travel window on the fly for automated lines processing parts of slightly varying lengths.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX110-20S the Right Cylinder?
Choose this 40 mm bore when an application requires roughly 628 N of push force at 0.5 MPa, stepping up from a 32 mm bore (402 N) or down from a 50 mm bore (982 N). An adjustable stroke is selected over a fixed SAI model when a machine requires variable end-stops or product-size changeovers, allowing the retract position to be set precisely on-site. Note that the rear adjuster and air cushions act as travel stops and deceleration devices, not a lock; this cylinder will not hold a load without live air. For load-holding without pressure, consider SAIL or BSAI models. This unit is dimensionally interchangeable per ISO 15552 and configured with a PT tapered port and a -S magnet.
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 SAIJ40BX110-20S FAQ
At 0.5 MPa, this 40 mm bore cylinder provides a push force of 628 N and a pull force of 528 N. At 0.7 MPa, the push force increases to 879 N.
The rear adjuster screw lets you shorten the 110 mm nominal stroke by up to 20 mm, creating a 90-110 mm usable travel window. The adjuster acts as a mechanical stop to set the retract position and does not lock the load without live air.
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