Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-20S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 950mm 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
- Stroke950 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-20S
The AirTAC SAIJ63X950-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 930 to 950 mm usable travel window, allowing you to dial back the extend position by up to 20 mm during machine commissioning or product changeover without adding external stops. In the 63 mm bore class, it delivers 1559 N of push force and 1402 N of pull force at 0.5 MPa, making it well-suited for moderate-load positioning tasks.
This variant includes a standard carbon steel piston rod and a magnet for position sensing, operating reliably with AirTAC CMSE reed and DMSE electronic solid-state switches. It features PT tapered port threads (G3/8) and uses the standard SAIJ mounting set, including Basic, FA, LB, TC, FTC, TCM1, and TCM2. The extruded aluminum barrel includes sensor grooves on both sides, and variable air cushions at both ends help manage deceleration over this long 950 mm travel.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-20S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 950 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 SAIJ63X950-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×950 | 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 SAIJ63X950-20S Is Used
Product Changeover Positioning
Quickly fine-tune the 930-950 mm extend stop on a conveyor sorting line when switching to a different package size, avoiding the need to physically swap out the entire cylinder.
Commissioning End-Stop Tuning
Dial in the exact end position during initial machine setup, using the 20 mm rear adjustment screw to perfectly align tooling without adding secondary external mechanical stops.
Long-Stroke Assembly Press
Utilize the 1559 N of push force at 0.5 MPa to drive a long-travel assembly fixture, relying on the built-in air cushions to smoothly decelerate the load near the end of the 950 mm stroke.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-20S the Right Cylinder?
Choose this 63 mm bore adjustable-stroke cylinder when you need precise end-position tuning on a long travel axis; the 20 mm adjustment window is ideal for accommodating slight mechanical variations or product size changes on a line. If your application requires less force, stepping down to a 50 mm bore yields 982 N of push force at 0.5 MPa, whereas upgrading to an 80 mm bore provides 2513 N for heavier loads. Because the 950 mm stroke is substantial, an external guide rail is strongly recommended to prevent excessive side loading on the 20 mm diameter piston rod and M16x1.5 rod thread.
The rear adjuster acts strictly as a travel stop to set the end position and works alongside the air cushion for deceleration; it does not hold the load without live air pressure. For true load-holding requirements without continuous air supply, consider the AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder variants. To match this ISO 15552 interchangeable unit, specify a 63 mm bore, 950 mm stroke, 20 mm adjustment, PT G3/8 ports, the required mounting bracket, and the -S magnet option.
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 SAIJ63X950-20S FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder generates 1559 N of push force and 1402 N of pull force. If operating at 0.7 MPa, the push force increases to 2182 N.
The rear adjusting screw allows you to shorten the effective travel from the nominal 950 mm down to 930 mm, providing a 930-950 mm usable window. It acts as a mechanical stop to fine-tune the end position and does not function as a lock to hold the load without air pressure.
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