Airtac SAIJ50 Adjustable Cylinder SAIJ50BX280-75
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX280-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm 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.
- BoreØ50 mm
- Stroke280 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- 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 SAIJ50 Adjustable Cylinder SAIJ50BX280-75
The AirTAC SAIJ50X280-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 982N of push force and 825N of pull force at 0.5 MPa, with a nominal 280mm stroke that can be dialed back by up to 75mm. This yields a usable travel window of 205-280mm, allowing precise end-position tuning at commissioning without adding external stops. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic switches.
This model is configured with a SUS304 stainless steel rod for superior corrosion resistance and a PT tapered port thread. The 20mm rod diameter and M16x1.5 rod thread provide robust resistance to side loads, though the 280mm stroke length still warrants an external guide for heavy loads. It uses a reduced mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB and CA options.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX280-75 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX280-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 280 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ50 Adjustable Cylinder SAIJ50BX280-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | 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 SAIJ50 Adjustable Cylinder SAIJ50BX280-75 Is Used
Variable End-Stop Tuning
Dial in the exact retract position from 205 to 280mm during machine commissioning to accommodate different product lengths without changing hardware.
Product Size Changeover
Quickly adjust the stroke window on packaging lines when switching between product variants, using the rear screw to set new physical limits.
Fine Positioning Setup
Achieve precise mechanical end-positioning during automated assembly by trimming the effective stroke to match exact fixture dimensions.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX280-75 the Right Cylinder?
Choose this 50mm bore over a 40mm version when you need to step up thrust from 628N to 982N at 0.5 MPa, or drop down from a 63mm bore (1559N) if your application requires a lighter footprint. The 75mm adjustment range is ideal for product-size changeovers on a line, letting operators fine-tune the retract end without swapping the cylinder. For any stroke of 280mm or more, an external guide is recommended to prevent excessive rod deflection.
The rear adjuster acts strictly as a travel stop and works alongside the standard air cushions to decelerate the load. It does not hold the load without live air pressure. For true load-holding without continuous air, select the SAIL lock or BSAI clamp-lock series instead. This cylinder is dimensionally interchangeable per ISO 15552, featuring a PT port thread and no integrated magnet.
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 SAIJ50 Adjustable Cylinder SAIJ50BX280-75 FAQ
The rear adjusting screw allows you to shorten the effective stroke by up to 75mm. This creates a usable travel window of 205 to 280mm, enabling fine-tuning of the end position at commissioning without replacing the cylinder.
At 0.5 MPa, it provides 982N of push force and 825N of pull force. At 0.7 MPa, the push force increases to 1374N.
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Covers non-human-caused product damage.
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