Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-50
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 275mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ63 mm
- Stroke275 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-50
The AirTAC SAIJ63X275-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 225-275mm, allowing you to dial back the 275mm nominal stroke by up to 50mm during commissioning. This bore delivers a robust 1559N pull force at 0.5MPa, making it suitable for moderate to heavy actuation tasks.
The piston rod is constructed from SUS420J2 stainless steel, offering good corrosion resistance and durability. The barrel is an extruded aluminum profile with sensor grooves on both sides for flexible switch mounting. It uses PT tapered ports and variable air cushions at both ends to manage end-of-stroke impact, though the adjuster acts only as a travel stop without holding the load without live air.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-50 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 275 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| 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, 36 mm |
| Max stroke | Up to 1500 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | 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 SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-50 Is Used
Machine Setup Calibration
Fine-tune the 225-275mm travel window during initial commissioning to perfectly align stops without machining external spacers.
Product Size Changeover
Quickly adjust the retract position by up to 50mm on packaging lines handling varying container heights.
Variable End-Stop Actuation
Execute precise pressing or clamping operations where the exact end position needs occasional tweaking based on material thickness.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-50 the Right Cylinder?
Choose this 63mm bore when you need higher force than the 50mm option (which provides 825N pull at 0.5MPa) but want a smaller footprint than the 80mm cylinder. The 50mm adjustment range is ideal for machinery requiring frequent product-size changeovers, allowing you to fine-tune the retract end position without swapping the cylinder or adding external stops. For position holding without live air pressure, consider the SAIL or BSAI series, as this cylinder's rear adjuster is a stop, not a lock.
This configuration includes a PT port thread, SUS420J2 stainless steel rod, and no magnet. It is dimensionally interchangeable per ISO 15552 and supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2. Since the 275mm stroke is relatively long, ensure adequate external guidance to prevent excessive side-loading on the rod.
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 SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-50 FAQ
It features a rear adjusting screw that allows you to shorten the effective stroke by up to 50mm. This creates a usable travel window of 225-275mm, letting you set the exact retract end-position without replacing the cylinder.
At 0.5MPa operating pressure, it provides 1559N of push force and 1402N of pull force. At the maximum 1.0MPa pressure, it can deliver up to 318kgf.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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