Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-50
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 250mm 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
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-50
The AirTAC SAIJ63X250-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 250mm travel that can be fine-tuned down by up to 50mm, yielding a precise 200-250mm usable window. Delivering 1559N of push force at 0.5MPa, it is built to handle mid-range industrial loads.
This unit features an SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and uses PT tapered port threads (G3/8). The rear adjuster acts purely as a mechanical stop to set the end position during commissioning; it is not a lock, so live air pressure is required to hold the load in place.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-50 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 250 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 SAIJ63AX250-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×250 | 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 SAIJ63AX250-50 Is Used
Product Changeover
Dial in the exact 200 to 250mm end-stop during format size changes on a packaging line without swapping hardware.
Machine Setup
Fine-tune the retraction point at commissioning to perfectly mate with varying tooling heights.
Variable End Stops
Trim the stroke back by up to 50mm to accommodate sensor alignment or prevent mechanical overtravel.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-50 the Right Cylinder?
Select this 63mm bore when a 50mm bore falls short on power (offering only 982N push at 0.5MPa) but you want to avoid stepping up to an 80mm cylinder that demands 2513N and larger valving. The 50mm adjustment range is ideal for production lines running multiple product sizes, allowing you to alter the end-of-stroke position without physically swapping the cylinder or adding external stopper blocks. For load-holding without continuous air pressure, an external pilot-operated check valve or a related SAIL pneumatic lock cylinder is required. When replacing an ISO 15552 unit, match the 63mm bore, 250mm stroke, PT G3/8 port, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the 250mm stroke is moderately long, ensure external guiding is used to prevent side-loading damage to the M16x1.5 rod thread.
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 SAIJ63AX250-50 FAQ
At 0.5MPa operating pressure, this 63mm bore cylinder provides 1559N of push force and 1402N of pull force. At its maximum 1.0MPa pressure, it can deliver up to 318kgf.
The rear adjuster screw lets you shorten the effective stroke from its 250mm nominal length down to 200mm. This mechanical stop sets the travel end and works alongside the standard air cushions, but it does not lock the load without live air pressure.
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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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