Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-75
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 275mm 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
- Stroke275 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 SAIJ50AX275-75
The AirTAC SAIJ50X275-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 982N push force at 0.5 MPa and uses a 20mm piston rod with an M16x1.5 thread. The built-in rear stopper allows you to trim the effective travel back by up to 75mm, creating a 200-275mm usable stroke window for precise positioning during commissioning.
This variant features a SUS420J2 stainless steel rod (code A) for improved corrosion resistance compared to standard carbon steel. It includes variable air cushions at both ends and integrated sensor grooves on three sides. Note that the rear adjuster acts purely as a mechanical stop for end-position tuning and does not hold the load without continuous live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-75 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 275 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 SAIJ50AX275-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×275 | 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 SAIJ50AX275-75 Is Used
Machine Changeover
Dial in the exact 200-275mm stroke window during product size changes without swapping out the entire cylinder or repositioning external stopper blocks.
Variable End Stops
Provides a fine-tuned retract end position for feeding or pushing varying package lengths on a conveyor line.
Assembly Positioning
Sets precise clamping or pressing depths at commissioning, using the 982N thrust to seat components accurately.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-75 the Right Cylinder?
Select this 50mm bore cylinder when your application requires 982N of push force at 0.5 MPa (or 1374N at 0.7 MPa) and you need flexibility in the final end-stop position. The 75mm adjustment range is ideal for product changeovers on a packaging line, allowing you to dial in the exact 200-275mm travel without swapping the cylinder or adding external stopper blocks. If your machine needs to hold the load mid-stroke without air pressure, a standard SAIJ will not suffice; you should look at the SAIL (air-released lock) or BSAI (clamp-lock) series instead.
Because the 275mm stroke is relatively long, the 20mm rod will experience higher bending moments under heavy side loads; always use an external guide rail to prevent rod damage. This model uses PT tapered port threads (G1/4 size) and supports the reduced SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR).
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 SAIJ50AX275-75 FAQ
The rear of the cylinder features an external adjusting screw that acts as a mechanical stopper. It allows you to shorten the nominal 275mm stroke by up to 75mm, giving a usable travel window of 200-275mm. This lets you fine-tune the end position at commissioning without changing the cylinder itself.
At a standard 0.5 MPa operating pressure, the SAIJ50X275-75 provides 982N of push force and 825N of pull force. If you increase the pressure to 0.7 MPa, the push force rises to 1374N.
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Covers non-human-caused product damage.
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