Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-40
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-40 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 SAIJ63AX250-40
The AirTAC SAIJ63X250-40 is a double-acting ISO 15552 profile cylinder with a rear stroke adjuster, providing a usable travel window of 210 to 250 mm. It delivers 1559 N of pull force at 0.5 MPa, making it suitable for medium-duty handling tasks. The extruded aluminum barrel features sensor grooves on both sides for flexible switch placement.
This variant uses a SUS420J2 stainless steel rod (code A) for improved corrosion resistance and features PT tapered port threads. The rear adjuster acts as a mechanical stop to fine-tune the retract end position during commissioning without swapping cylinders. It supports a speed range of 30-800 mm/s and includes variable air cushions at both ends to decelerate moving loads.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-40 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-40 |
|---|---|
| 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 SAIJ63AX250-40
| 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 SAIJ63AX250-40 Is Used
Machine Changeover
Dial in the retract stroke by up to 40 mm during product size changes to accommodate new tooling lengths without mechanical rebuilds.
Variable End Stops
Provides a 210 to 250 mm travel window for conveyor diverters or gating arms that require precise end-position tuning at commissioning.
Assembly Station Tuning
Fine-tune the clamping or pressing position on the fly to adapt to varying part tolerances in automated assembly lines.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-40 the Right Cylinder?
Choose this 63 mm bore cylinder when a 1559 N pull force at 0.5 MPa fits your load requirement, or step down to a 50 mm bore (825 N pull) for lighter duties. The 40 mm adjustment range is ideal for product changeovers, allowing you to dial in the exact end position without adding external stops. For fixed travel without an adjusting screw, use the standard SAI cylinder.
When replacing an ISO 15552 cylinder, match the 63 mm bore, 250 mm stroke, PT port threads, and the Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting set. This model has no magnet, so position sensing requires adding a separate external switch. Since the stroke is 250 mm, ensure adequate external guidance to prevent rod side-load damage. The rear adjuster is a travel stop, not a lock; for load-holding without live air, 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 SAIJ63AX250-40 FAQ
The rear adjusting screw acts as a mechanical stop, allowing you to shorten the effective stroke from 250 mm down to 210 mm. This provides a 40 mm tuning window to set the exact retract end position without changing the cylinder.
At 0.5 MPa operating pressure, it provides 1559 N of pull force and 2182 N of push force. It can deliver up to 318 kgf at its maximum 1.0 MPa operating 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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