Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-50
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 400mm 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
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-50
The AirTAC SAIJ63X400-50 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel down to 350 mm from its 400 mm nominal stroke. Delivering a pull force of 1402 N at 0.5 MPa and a push force of 1559 N, it provides robust actuation for mid-range pneumatic tasks. This configuration uses a SUS420J2 stainless steel rod (code A) for superior corrosion resistance and features PT tapered port threads.
Equipped with a G3/8 port and a 20 mm rod diameter with an M16x1.5 thread, this unit handles speeds from 30-800 mm/s. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting, while the variable air cushions at both ends work alongside the rear stopper to manage end-of-stroke deceleration. The rear adjuster acts strictly as a travel stop and requires live air pressure to maintain load position.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-50 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 400 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 SAIJ63AX400-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×400 | 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 SAIJ63AX400-50 Is Used
Adjustable Machine Stops
Dial in the exact 350-400 mm end-position during commissioning to accommodate varying product lengths without changing the cylinder.
Changeover Setup
Quickly trim the retract stroke by up to 50 mm during product line changeovers, saving time on mechanical retooling.
Assembly Actuation
Utilize the 1559 N push force at 0.5 MPa to drive clamping or pressing operations that require precise end-of-travel tuning.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-50 the Right Cylinder?
Choose this 63 mm bore when your application demands higher thrust than a 50 mm bore (which yields 825 N pull at 0.5 MPa), but without the bulk of an 80 mm option. The 50 mm adjustment range is ideal for machine setups requiring variable end-stops or frequent product-size changeovers, eliminating the need to physically swap cylinders or bolt on external stops during commissioning.
Because the total stroke is 400 mm, an external guide is recommended to prevent excessive side-loading on the unsupported rod. For any ISO 15552 replacement, verify the 400 mm stroke, 50 mm adjuster, PT G3/8 port, and standard mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that the rear adjuster is not a locking mechanism; for true 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 SAIJ63AX400-50 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder generates 1559 N of push force and 1402 N of pull force. It can deliver up to 318 kgf at its maximum 1.0 MPa pressure.
The rear adjusting screw acts as a mechanical stopper that lets you shorten the 400 mm nominal stroke by up to 50 mm, creating a usable travel window of 350-400 mm. It only sets the end position and does not lock the load without live air pressure.
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