Airtac SAIJ40 Adjustable Cylinder SAIJ40X280-100
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40X280-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 280mm 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
- Stroke280 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40X280-100
The AirTAC SAIJ40X280-100 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 628N of push force at 0.5 MPa. It features a carbon steel piston rod and PT tapered ports. By turning the rear stopper screw, you can trim the effective travel anywhere within a 180-280mm window, providing exceptional flexibility during machine commissioning or product changeovers without swapping hardware.
This adjustable mechanism acts purely as a mechanical end-stop to fine-tune the retract position and relies on the integrated air cushions for deceleration; it does not lock the load or hold position without live air pressure. For load-holding requirements, consider the SAIL or BSAI variants. The extruded aluminum barrel includes sensor grooves on both sides, ready to accept CMSE reed or DMSE electronic switches if a magnet is specified later.
Airtac SAIJ40 Adjustable Cylinder SAIJ40X280-100 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40X280-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 280 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 SAIJ40X280-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×280 | 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 SAIJ40X280-100 Is Used
Changeover Calibration
Dial in the exact retract distance within the 180-280mm window during product size changeovers, eliminating the need to physically swap cylinders or add external shims.
Variable End-Stop Positioning
Set precise mechanical stops for machining or clamping stations where the final end-position needs micro-adjustments at commissioning without altering the PLC program.
Dynamic Diverter Setup
Adjust the stroke on packaging lines to accommodate different carton sizes on the fly, using the rear screw to tune the pusher arm extension accurately.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40X280-100 the Right Cylinder?
Choose this 40mm bore when an application requires precise end-position tuning across a wide 180-280mm range, stepping up from a 32mm bore (402N push at 0.5 MPa) or down from a 50mm bore (982N push at 0.5 MPa). The adjustable stroke is ideal for setups requiring variable end-stops on the fly, whereas a fixed SAI cylinder suits applications with rigid, unchanging travel requirements. To match this ISO 15552 footprint, specify the 40mm bore, 280mm stroke, 100mm adjustment, PT port thread, and your preferred mounting from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2).
Because the 280mm stroke is relatively long for this bore size, the 16mm carbon steel rod and M12x1.25 thread provide robust support, but an external guide is recommended to prevent excessive side-loading on unsupported loads. Remember that the rear adjuster is a travel stop, not a clamp; if the machine loses air, the cylinder will not hold its position.
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 SAIJ40X280-100 FAQ
At a standard operating pressure of 0.5 MPa, this 40mm bore cylinder provides 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 879N.
The rear adjuster screw allows you to mechanically shorten the nominal 280mm stroke by up to 100mm, creating a usable travel window of 180-280mm. This stopper fine-tunes the end position but does not lock the load without continuous air pressure.
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