Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-30S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 800mm 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
- Stroke800 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-30S
The AirTAC SAIJ40X800-30-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the end position without swapping out the entire unit. Based on an 800 mm nominal stroke and a 30 mm adjustment code, it provides a usable travel window of 770-800 mm, letting you dial in the exact retract distance during commissioning or product changeovers. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa.
This variant includes a SUS304 stainless steel rod for superior corrosion resistance and is equipped with a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel features sensor grooves on both sides for flexible switch mounting. While the rear adjuster sets the travel end and the built-in air cushions decelerate the load, neither acts as a lock; the cylinder cannot hold a load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-30S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 800 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 SAIJ40BX800-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×800 | 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 SAIJ40BX800-30S Is Used
Machine Changeover
Quickly adjust the retract end-stop by up to 30 mm when switching between product sizes on a packaging line, avoiding the need to physically swap cylinders.
Variable End Positioning
Dial in the exact 770-800 mm travel window during commissioning to perfectly align a diverter or pusher arm without adding external mechanical stops.
Corrosive Setup Tuning
Leverage the SUS304 stainless steel rod and precise stroke adjustment for light manufacturing environments where both corrosion resistance and exact end-positioning are required.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-30S the Right Cylinder?
Choose this 40 mm bore when you need more force than a 32 mm cylinder (which offers 402 N push at 0.5 MPa) but want a more compact footprint than a 50 mm option (982 N push). The adjustable stroke is ideal for applications requiring variable end-stops or precise setup tuning without adding external mechanical stops. For load-holding without continuous air pressure, consider an external rod lock or pilot-operated check valve, or explore the SAIL or BSAI cylinder series.
Because this model has an 800 mm stroke, the 16 mm rod and M12x1.25 rod thread will experience leverage forces if the load is unsupported. An external guide is strongly recommended to prevent side-loading damage. To match this ISO 15552 interchangeable cylinder, specify: 40 mm bore, 800 mm stroke, 30 mm adjustment, PT tapered port thread, G1/4 port size, Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting, and a magnet for sensors.
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 SAIJ40BX800-30S FAQ
At an operating pressure of 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At the maximum pressure of 1.0 MPa, it achieves a push force of 128 kgf.
The rear adjuster acts as a mechanical stop that allows you to shorten the effective stroke from the nominal 800 mm down to 770 mm. It sets the travel end and works with the air cushions to decelerate the load, but it does not lock or hold the load without live air pressure.
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