Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-40
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 230mm 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
- Stroke230 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-40
The AirTAC SAIJ40X230-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the effective travel. With a nominal 230 mm stroke and a 40 mm adjustment range, it provides a usable travel window of 190 to 230 mm. This allows precise end-position tuning at commissioning without swapping the cylinder or adding external stops. The 40 mm bore generates 628 N of push force and 528 N of pull force at 0.5 MPa.
This SKU is configured with a SUS304 stainless steel rod (code B) for superior corrosion resistance, a PT tapered port, and operates at speeds from 30 to 800 mm/s. It utilizes variable air cushions at both ends to decelerate the moving load. The rear adjuster acts strictly as a travel stop, not a lock, meaning it cannot hold a load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 230 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 SAIJ40BX230-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×230 | 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 SAIJ40BX230-40 Is Used
End-Position Tuning
Dial in the exact retract distance within the 190-230 mm window during machine commissioning to accommodate minor mechanical variations without hardware changes.
Product Changeover
Quickly adjust the stroke stop on a packaging line when switching to a different product size, reducing setup downtime and avoiding external stopper additions.
Assembly Station Setup
Precisely set the pressing depth for a 628 N assembly operation, using the rear screw to fine-tune the travel end rather than relying on hard mechanical limits.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-40 the Right Cylinder?
Choose this 40 mm bore adjustable-stroke cylinder when your application requires fine-tuning the retract end-position during machine setup or product changeover. If your process needs less force, stepping down to a 32 mm bore yields 402 N of push force at 0.5 MPa; if you need more power, a 50 mm bore provides 982 N. For load-holding requirements without continuous air pressure, this standard SAIJ is insufficient—consider an AirTAC SAIL (air-released lock) or BSAI (clamp-lock) cylinder instead.
When replacing an ISO 15552 cylinder, match the 40 mm bore, 230 mm stroke, up to 40 mm adjustment, PT port thread, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). This unit lacks a standard magnet, so it cannot host CMSE or DMSE sensors without modification. Because the 230 mm stroke is relatively long, ensure proper external guiding to prevent excessive side-loading on the 16 mm rod and M12x1.25 rod thread.
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 SAIJ40BX230-40 FAQ
It features a rear adjusting screw that acts as a mechanical stop, allowing you to shorten the effective stroke by up to 40 mm. This creates a usable travel window of 190 to 230 mm, enabling fine-tuning of the end position without replacing the cylinder.
At an operating pressure of 0.5 MPa, the 40 mm bore generates 628 N of push force and 528 N of pull force. It can deliver up to 1130 N of push force at 0.9 MPa.
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