Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-40
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 120mm 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
- Stroke120 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-40
The AirTAC SAIJ63X120-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 120 mm travel by up to 40 mm. This creates a usable end-position window of 80 to 120 mm, letting you fine-tune the retract distance at commissioning without swapping the cylinder or adding external stops. It delivers a robust 2182 N push force at 0.7 MPa, making it well-suited for medium-duty positioning tasks.
This unit features a SUS420J2 stainless steel piston rod (option A) for improved corrosion resistance compared to standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic sensors. It uses PT tapered ports sized G3/8 and relies on adjustable air cushions at both ends to decelerate the load smoothly.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-40 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 120 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 SAIJ63AX120-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×120 | 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 SAIJ63AX120-40 Is Used
Machine Changeover
Dial in the exact retract distance from 80 to 120 mm during product size changes without replacing the cylinder or adding external stops.
Variable End-Stop Positioning
Set precise end positions at commissioning to accommodate varying material lengths or tooling depths on the fly.
Medium-Force Clamping
Leverage the 2182 N push force at 0.7 MPa to secure workpieces while tuning the travel to prevent overtravel damage.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-40 the Right Cylinder?
Choose this 63 mm bore when your application requires around 2182 N of push force at 0.7 MPa; if you need less force, a 50 mm bore provides 1374 N, while an 80 mm bore steps up to 3518 N. The adjustable stroke is ideal for product changeovers or variable end-stops on a line, offering setup flexibility that a fixed-stroke SAI cylinder cannot match. When ordering a replacement, verify the 120 mm stroke, 40 mm adjustment range, PT G3/8 port, and your required mounting style. SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets. Because the stroke is under 300 mm, side-load stress is moderate, but long unsupported loads should still use an external guide. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true 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 SAIJ63AX120-40 FAQ
The 63 mm bore generates a push force of 2182 N and a pull force of 1402 N at 0.7 MPa. At the maximum operating pressure of 1.0 MPa, it delivers up to 318 kgf.
A rear stopper screw lets you shorten the nominal 120 mm stroke by up to 40 mm, creating an adjustable travel window of 80 to 120 mm. The adjuster is a mechanical stop that sets the end position and does not lock the load without continuous air pressure.
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