Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-100
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 115mm 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
- Stroke115 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-100
The AirTAC SAIJ40X115-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 15-115 mm usable travel window from its 115 mm nominal stroke. Delivering 628 N of push force and 528 N of pull force at 0.5 MPa, it is built with a SUS304 stainless steel rod for superior corrosion resistance and a PT tapered port thread. This adjustable model allows precise end-position tuning at commissioning without swapping the entire cylinder or adding external stops.
The rear adjuster acts purely as a travel stop and works alongside the standard 30 mm variable air cushions at both ends to decelerate the piston. It is not a lock and will not hold a load without live air pressure; for true load-holding, consider the SAIL or BSAI series. This 40 mm bore utilizes a 16 mm rod with an M12x1.25 thread, and its extruded aluminum barrel features sensor grooves on both sides for flexible mounting of CMSE and DMSE switches.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-100 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 115 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 SAIJ40BX115-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×115 | 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 SAIJ40BX115-100 Is Used
Machine Changeover
Rapidly reconfigure end-stops for varying product lengths on a packaging line without physically replacing the actuator.
Commissioning Tuning
Fine-tune the exact end-of-stroke position during initial setup to dial in timing and avoid mechanical hard crashes.
Variable End Stops
Adjust the travel window dynamically for testing different material feeds or clamping distances in a test fixture.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-100 the Right Cylinder?
Choose this 40 mm bore when an application requires 628 N of push force at 0.5 MPa, stepping up from a 32 mm bore that provides 402 N, or stepping down from a 50 mm bore that yields 982 N. The massive 100 mm adjustment range is ideal for machines that undergo frequent product-size changeovers, allowing operators to dial in the exact 15-115 mm travel window on the fly. Because the rear screw functions only as an end-stop and not a brake, external pilot-operated check valves or the SAIL lock series are required if the load must be held without continuous air pressure.
For an exact ISO 15552 replacement, match the 40 mm bore, 115 mm stroke, 100 mm adjustment, PT port thread, and the SUS304 rod material. The operating speed is 30-800 mm/s. Since this cylinder has a 115 mm stroke, side-loading is minimal, but long unsupported strokes generally require an external guide. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR.
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 SAIJ40BX115-100 FAQ
A rear external screw stopper lets you shorten the effective stroke by up to 100 mm, creating a 15-115 mm usable travel window. It acts as a mechanical stop to set the end position and is used alongside the air cushions, but it is not a lock and cannot hold a load without live air pressure.
At 0.5 MPa it provides 628 N of push force and 528 N of pull force. The operating speed ranges from 30-800 mm/s, driven by a G1/4 port size and a 16 mm SUS304 stainless steel rod.
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