Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-40S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 135mm 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
- Stroke135 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-40S
The AirTAC SAIJ63X135-40-S is a double-acting ISO 15552 profile cylinder with a rear stroke adjuster, letting you dial back the travel to create a precise 95-135 mm usable window without adding external stops. Built with a SUS420J2 stainless steel rod, it handles demanding environments while delivering 1559 N of push force at 0.5 MPa. The integrated magnet enables direct mounting of CMSE reed or DMSE electronic sensors along the dual-side barrel grooves.
This model uses PT tapered port threads and includes a variable air cushion at both ends to manage end-of-stroke deceleration. The rear adjuster acts purely as a mechanical stop for fine-tuning end positions during commissioning or product changeovers. It does not lock the load without live air pressure, so applications requiring true hold-down force should explore the related SAIL or BSAI clamp-lock series.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-40S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 135 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 SAIJ63AX135-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×135 | 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 SAIJ63AX135-40S Is Used
Product Changeover
Dial in the 95-135 mm travel window during line changeovers to accommodate different package sizes without physically replacing the cylinder.
End-Stop Tuning
Fine-tune the retract position during machine commissioning to perfect the timing of a pressing or clamping operation.
Variable Positioning
Establish a precise mechanical stop for an assembly fixture, relying on the rear adjuster to set the exact final position.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-40S the Right Cylinder?
Choose this 63 mm bore when you need higher thrust than a 50 mm bore (which provides 982 N push at 0.5 MPa) but want to avoid the larger footprint of an 80 mm unit. The adjustable -40 mm stroke is ideal for production lines running mixed product sizes, allowing you to reposition the retract end-stop on the fly instead of swapping out a fixed-stroke SAI cylinder. To match this ISO 15552 replacement exactly, verify the 63 mm bore, 135 mm nominal stroke, PT ports, and the -S magnet requirement.
With a 135 mm stroke, the 20 mm rod diameter provides robust resistance to bending, though any long unsupported load still requires an external guide rail to prevent side-load damage. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, deliberately omitting the FB, CA, CB, and CR brackets found on some standard models.
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 SAIJ63AX135-40S FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 318 kgf.
The rear adjuster screw lets you mechanically shorten the 135 mm nominal stroke by up to 40 mm, creating a usable travel window of 95 to 135 mm. This allows precise end-position tuning at commissioning without swapping the cylinder.
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