Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-50S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 300mm 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
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-50S
The AirTAC SAIJ63X300-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 250-300 mm usable travel window, allowing you to dial back the nominal 300 mm stroke by up to 50 mm during commissioning. The SUS420J2 stainless steel rod offers high corrosion resistance, and the integrated magnet enables position detection across both sensor grooves.
Delivering 2182 N of push force at 0.7 MPa, this 63 mm bore profile cylinder utilizes a PT tapered G3/8 port. The rear stopper mechanism fine-tunes end positions without swapping the barrel, while the standard variable air cushions decelerate the piston at both ends.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-50S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 300 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 SAIJ63AX300-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×300 | 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 SAIJ63AX300-50S Is Used
Variable End-Stop Tuning
Dial in the exact 250-300 mm end position during machine setup without adding external stops or changing the cylinder.
Product Size Changeovers
Quickly adapt the stroke length on packaging lines when switching between different package dimensions.
Assembly Line Positioning
Provides reliable 2182 N push force at 0.7 MPa for moving intermediate workpieces along modular conveyors.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-50S the Right Cylinder?
Choose this 63 mm bore when a 50 mm stroke adjustment range is required to accommodate varying product sizes on a single line. If your application needs less force, stepping down to a 50 mm bore yields 1374 N at 0.7 MPa. The built-in -S magnet pairs directly with AirTAC CMSE reed and DMSE electronic solid-state sensors for precise end-of-travel signaling.
When replacing an ISO 15552 cylinder, match the 63 mm bore, 300 mm stroke, PT G3/8 port, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the stroke is 300 mm, an external guide is recommended to prevent excessive side-load on the 20 mm rod. Note that the rear adjuster acts only as a travel stop; it does not hold the load without live air. For fail-safe load holding, consider the SAIL or BSAI series.
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 SAIJ63AX300-50S FAQ
The rear adjuster acts as an external stopper that lets you shorten the effective travel from 300 mm down to 250 mm. It sets the retract end position but does not lock the load without continuous air pressure.
At 0.7 MPa operating pressure, this 63 mm bore cylinder provides 2182 N of push force and 1402 N of pull force.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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