Airtac SAIJ50 Adjustable Cylinder SAIJ50BX280-75S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX280-75S 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 SAIJ50BX280-75S
The AirTAC SAIJ50X280-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 205-280 mm, letting you dial back the nominal 280 mm stroke by up to 75 mm during commissioning without swapping out the unit. Delivering 982 N of push force at 0.5 MPa, it bridges the gap between smaller 40 mm bores and heavier 63 mm actuators.
This SKU ships with a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet for position sensing. It is fully compatible with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel incorporates sensor grooves on both sides, and because this is a profile cylinder, it omits the FB, CA, CB, and CR mounts, utilizing a reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2).
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX280-75S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX280-75S |
|---|---|
| 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 SAIJ50BX280-75S
| 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 SAIJ50BX280-75S Is Used
Product Changeover
Dial in the 205-280 mm travel window during format size changes on a packaging line, using the rear screw to fine-tune the retract position without adding external stopper blocks.
Machine Setup
Perfect for commissioning new equipment where the exact end-of-stroke position is unknown, letting technicians trim up to 75 mm off the nominal 280 mm stroke to clear mechanical obstructions.
Variable End Stops
Ideal for testing fixtures that require multiple retract distances, providing a hard stop at the rear while the air cushion decelerates the load safely.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX280-75S the Right Cylinder?
Choose this 50 mm bore when an application requires 982 N push force at 0.5 MPa, which is significantly more than the 628 N from a 40 mm bore, yet lighter and faster than a 63 mm unit. The 75 mm adjustment range is ideal for product changeovers on a line, allowing operators to set variable end-stops on the fly rather than machining new hard stops. If your process requires the load to be held mechanically without live air pressure, note that the rear adjuster here acts only as a travel stop, not a lock; you would need an external rod lock or a SAIL/BSAI series cylinder instead.
Because the 280 mm stroke is substantial, the 20 mm rod diameter and M16x1.5 rod thread will experience some deflection under heavy side loads. For strokes of 300 mm or more, always guide the load externally to prevent rod bending. This actuator is dimensionally interchangeable per ISO 15552, uses PT tapered ports (G1/4), and operates at speeds of 30-800 mm/s.
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 SAIJ50BX280-75S FAQ
At 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 200 kgf.
The rear adjuster screw lets you shorten the effective travel from 280 mm down to a minimum of 205 mm, creating a 75 mm adjustable window. The adjuster acts as a mechanical stop to set the retract position and does not lock the load without live air pressure.
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