Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-30
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-30 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 SAIJ40BX800-30
The AirTAC SAIJ40X800-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 770-800mm usable travel window. Delivering 879N of push force at 0.7MPa, it utilizes a SUS304 stainless steel rod and a PT tapered port for pneumatic connection. This configuration is dimensionally interchangeable with ISO 15552 cylinders such as standard profile types.
The rear stopper mechanism allows you to fine-tune the retract end-position during commissioning without adding external stops. Note that this adjuster acts purely as a travel stop and does not hold the load without live air pressure; for true load-holding, consider the SAIL or BSAI series. It supports a speed range of 30-800mm/s and accepts the reduced SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-30 |
|---|---|
| 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 SAIJ40BX800-30
| 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 SAIJ40BX800-30 Is Used
Machine Changeover
Dial in the exact retract position within the 770-800mm window when switching product sizes on a packaging line, avoiding physical cylinder swaps.
Long-Stroke Diverters
Fine-tune the end-stop for long-travel sorting gates, using the 879N push force to move products reliably at 0.7MPa.
Assembly Calibration
Adjust the stroke during initial commissioning to perfectly set the 800mm travel distance without machining external stopper blocks.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-30 the Right Cylinder?
Select this 40mm bore cylinder when an application requires a nominal 800mm stroke but demands precise end-position tuning within a 770-800mm window. If your machine needs less force, stepping down to a 32mm bore yields 563N at 0.7MPa, whereas stepping up to a 50mm bore provides 1374N. An adjustable stroke is ideal for product-size changeovers on a line, avoiding the need to swap out a fixed-stroke SAI cylinder.
Because this stroke reaches 800mm, the 16mm rod requires an external guide to prevent excessive side-loading and binding over the extended travel. To match this exact configuration for an ISO 15552 replacement, specify: 40mm bore, 800mm stroke, 30mm adjustment, PT port, SUS304 (B) rod material, no magnet, and a mounting style from the approved SAIJ subset.
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 SAIJ40BX800-30 FAQ
At 0.7MPa, this 40mm bore cylinder provides 879N of push force and 528N of pull force. It can deliver up to 1130N push force at 0.9MPa.
The rear adjuster screw lets you shorten the effective stroke by up to 30mm, creating a 770-800mm usable travel window. It functions as a travel stop for end-position tuning and does not lock the load without continuous air pressure.
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