Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-50
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-50 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 SAIJ63AX135-50
The AirTAC SAIJ63X135-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the end position. With a nominal 135 mm stroke and a 50 mm adjustment range, it provides a highly flexible 85-135 mm usable travel window for precise product changeovers. It delivers a robust 1559 N push force at 0.5 MPa, making it suitable for medium-duty handling tasks.
This variant features a SUS420J2 stainless steel rod for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for direct CMSE or DMSE sensor mounting. It supports a speed range of 30-800 mm/s and uses the standard SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), deliberately omitting FB and CA brackets.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-50 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-50 |
|---|---|
| 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 SAIJ63AX135-50
| 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 SAIJ63AX135-50 Is Used
Variable End-Stop Tuning
Dial in the exact 85 to 135 mm retraction point during machine commissioning to accommodate different product lengths without adding external physical stops.
Product Changeover
Quickly adapt automated line tooling for new part sizes by adjusting the rear screw, saving downtime compared to physically replacing fixed-stroke actuators.
Medium-Duty Positioning
Leverage the 1559 N push force at 0.5 MPa to push or lift workpieces into exact machining fixtures before final clamping.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-50 the Right Cylinder?
Choose this 63 mm bore when you need 1559 N of thrust at 0.5 MPa, stepping up from a 50 mm bore (982 N) for heavier payloads, or down from an 80 mm bore (2513 N) to save space. The adjustable 85-135 mm travel window is ideal for machine setups requiring variable end-stops without swapping hardware. Remember that the rear adjuster acts strictly as a mechanical stop for deceleration; it does not hold the load without live air. For fail-safe load holding without pressure, select a SAIL or BSAI cylinder instead.
To match this ISO 15552 replacement, verify the 63 mm bore, 135 mm stroke, 50 mm adjustment, PT G3/8 port, and your required mounting bracket. The 20 mm rod diameter and M16x1.5 thread handle moderate side loads well, but any stroke over 300 mm on larger models would require an external guide.
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 SAIJ63AX135-50 FAQ
The rear adjuster screw lets you mechanically shorten the effective stroke from its nominal 135 mm down to 85 mm, providing a 50 mm tuning window to set the exact retract end-position during commissioning.
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. It can reach up to 2805 N push force at its maximum 1.0 MPa pressure.
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