Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-10
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 450mm 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
- Stroke450 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-10
The AirTAC SAIJ40X450-10 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the 450 mm nominal travel by up to 10 mm. This creates a precise 440-450 mm usable window, letting you fine-tune the end-of-stroke position at commissioning without adding external stopper blocks. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa, fitting neatly into mid-range pneumatic setups.
This SKU is built with a SUS304 stainless steel rod (option B) for superior corrosion resistance in harsh or washdown environments. It uses a PT G1/4 port and relies on variable air cushions at both ends to decelerate the load. Remember that the rear adjuster acts only as a travel stop; it does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-10 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 450 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 SAIJ40BX450-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×450 | 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 SAIJ40BX450-10 Is Used
Commissioning Fine-Tuning
Dial in the exact 440-450 mm end-stop during initial machine build to perfect part ejection without machining custom physical spacers.
Product Changeover
Quickly adjust the retract position by up to 10 mm on the fly when running a slightly shorter product profile on the same conveyor line.
Corrosive Assembly Press
Leverage the SUS304 stainless steel rod for light pressing duties in humid environments while trimming the stroke to match varying component heights.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-10 the Right Cylinder?
Choose this 40 mm bore when your application requires the 628 N thrust class at 0.5 MPa but demands an exact end-position tweak during machine setup or product changeover. If you need significantly more force, stepping up to the 50 mm bore yields 982 N of push force. Conversely, lighter duties can drop to the 32 mm bore at 402 N. Because the 450 mm stroke is quite long, an external guide is strongly recommended to prevent excessive side-loading on the 16 mm rod.
An adjustable-stroke SAIJ is preferred over a fixed SAI when you need a variable end-stop rather than machining custom spacers. To replace an ISO 15552 cylinder, match the 40 mm bore, 450 mm stroke, 10 mm adjuster, PT G1/4 port, and your required mounting style. Note that SAIJ supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, omitting FB, CA, CB, and CR. For load-holding without air, select a SAIL or BSAI series instead.
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 SAIJ40BX450-10 FAQ
At 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. It operates at speeds between 30 and 800 mm/s.
A rear external stopper screw lets you shorten the 450 mm nominal stroke by up to 10 mm, providing a usable travel window of 440-450 mm. The adjuster sets the end position but does not lock the load without continuous air pressure.
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