Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-100S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 140mm 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
- Stroke140 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-100S
The AirTAC SAIJ40X140-100-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 40 mm bore and a 140 mm nominal stroke, but the external adjusting screw lets you dial back the retract end by up to 100 mm. This creates a highly versatile usable travel window of 40 to 140 mm, allowing precise end-position tuning at commissioning without swapping the cylinder or adding external stops. In the 40 mm bore class, it delivers 628 N of push force and 528 N of pull force at 0.5 MPa.
This specific SKU is built with a SUS304 stainless steel rod (option B) for superior corrosion resistance and includes a magnet (-S) for position sensing. The integrated magnet is fully compatible with AirTAC CMSE reed switches and DMSE solid-state electronic sensors, which seat directly into the dual-sided sensor grooves on the extruded aluminum barrel. It uses PT tapered ports sized at G1/4, and the standard adjustable air cushions at both ends absorb kinetic energy at the stroke extremes.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-100S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 140 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 SAIJ40BX140-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×140 | 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 SAIJ40BX140-100S Is Used
Variable End-Stop Tuning
Dial in the exact retract position from 40 to 140 mm during machine commissioning to perfect product seating without machining new hard stops.
Product Size Changeover
Rapidly adapt a packaging line for different carton lengths by adjusting the rear stopper screw instead of physically swapping out the entire actuator.
Corrosive Setup Actuation
Leverage the SUS304 stainless steel rod for reliable clamping and positioning in food processing or chemical environments requiring precise travel limits.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-100S the Right Cylinder?
Choose this 40 mm bore model when your application requires 628 N of push force at 0.5 MPa and a highly variable end-stop, as the 100 mm adjustment range provides a massive 40-140 mm travel window. If you need more thrust, stepping up to the 50 mm bore yields 982 N of push force. If you need less force and a faster cycle, the 32 mm bore provides 402 N. Because the nominal stroke is 140 mm, side-load risks are minimal, but long unsupported strokes still require an external guide to prevent rod binding.
The rear adjuster on this cylinder acts purely as a mechanical travel stop to fine-tune the end position during machine setup or product changeover. It is not a lock; a plain SAIJ cylinder does not hold its load without live air pressure. For load-holding requirements without continuous air, consider the SAIL (air-released lock) or BSAI (clamp-lock) series. When matching an ISO 15552 replacement, ensure you specify the 40 mm bore, 140 mm stroke, 100 mm adjustment, PT G1/4 port, and the -S magnet. The compatible mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ40BX140-100S FAQ
The rear adjusting screw acts as an external stopper that can shorten the effective stroke by up to 100 mm. This gives the 140 mm nominal stroke a usable travel window of 40 to 140 mm, allowing you to fine-tune the retract end position at commissioning without changing the cylinder.
At a standard 0.5 MPa operating pressure, the SAIJ40X140-100-S generates 628 N of push force and 528 N of pull force. It can deliver up to 1130 N of push force at its maximum 0.9 MPa pressure.
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