This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X35-20S, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X35-20S
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X35-20S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 35mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ63X35-20S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke35 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ63X35-20S
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X35-20S
The AirTAC SIJ63X35-20S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 63mm bore, 35mm nominal stroke, and a -S piston magnet. An external stop screw lets you trim the extend stroke by up to 20mm on-site, yielding a usable 15-35mm stroke window. The stop sets the end position but is not a load lock.
The direct replacement is the SAIJ63X35-20S, matching the ISO 15552 mounting interface, force, and adjustability. The SAIJ upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. A plain cylinder drifts on air loss; use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X35-20S Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X35-20S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X35-20S |
| Bore size | Ø63 mm |
| Stroke | 35 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, 30 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ63X35-20S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / 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 | |
The SAIJ63X35-20S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X35-20S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×35 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X35-20S Is Used
Short-Stroke Clamping
Ideal for clamping parts where the exact contact point varies, using the 20mm stop screw to tune the 35mm extend stroke on-site without changing the cylinder body.
Diversion Gate Adjustment
Perfect for conveyor routing gates that need field stroke tuning between 15mm and 35mm to accommodate varying package sizes on the fly.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X35-20S with the SAIJ63X35-20S
To replace the discontinued SIJ63X35-20S, order the direct replacement SAIJ63X35-20S, which preserves the 63mm bore, 35mm nominal stroke, 20mm adjust window, G3/8 port, and ISO 15552 mounting. The 20mm adjust window is ideal if your end-stop needs on-site tuning between 15mm and 35mm. Reuse FA, LB, or TC mounts directly. The -S suffix means a magnet is present for legacy CS1-B/DS1-B switches; the SAIJ uses current AirTAC switches. For stroke lengths under 300mm, side-load levering is minimal, but ensure rigid guidance for the 20mm rod.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X35-20S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X35-20S FAQ
Yes, the SIJ63X35-20S is discontinued. The direct replacement is the SAIJ63X35-20S. It shares the same ISO 15552 interface, 63mm bore, 35mm stroke, 20mm adjust window, G3/8 port, and mounting options. The SAIJ features an upgraded two Y-shaped one-way piston seal for lower start-up pressure and longer life.
The external stop screw allows you to trim the extend stroke by up to 20mm on-site, giving a usable window of 15-35mm. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X35-20S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X35-20S replacement — usually within 7-8 hours.