This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X35-40S, 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 SIJ63X35-40S
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X35-40S 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 SAIJ63X35-40S, 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 → SAIJ63X35-40S
- 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 SIJ63X35-40S
The AirTAC SIJ63X35-40S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 63 mm bore and a 35 mm maximum extend stroke. An external stop screw lets you trim the extend stroke by up to 40 mm on-site, yielding a usable 0-35 mm window. The direct replacement is the SAIJ63X35-40S, matching the G3/8 port, M16x1.5 rod thread, and 30 mm adjustable cushions. The SAIJ upgrade uses a two Y-shaped one-way piston seal for lower start-up pressure and longer life.
The stop screw sets the end position but is not a load lock; use an external rod lock or SAIL variant for held loads. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X35-40S Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X35-40S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X35-40S |
| 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 SAIJ63X35-40S 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 SAIJ63X35-40S 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 SIJ63X35-40S
| 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 SIJ63X35-40S Is Used
Short-Stroke Clamping
Field-tunes the 0-35 mm extend contact point on machining fixtures, allowing precise clamping of variable part thicknesses without swapping cylinders.
Variable-Length Diverting
Adjusts the extend stroke on-site to push different carton widths off a line, using the 40 mm stop screw to set exact diverting distances.
Compact Part Ejection
Provides a short 35 mm ejection push in tight machinery footprints, with the stop screw allowing stroke reduction for delicate components.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X35-40S with the SAIJ63X35-40S
To replace the discontinued SIJ63X35-40S, order the direct replacement SAIJ63X35-40S, reusing your existing ISO 15552 FA, LB, or TC mounts. The 40 mm adjust window lets you tune the 35 mm extend stroke down to zero on-site. The -S magnet enables position sensing. Because the 35 mm stroke is under 300 mm, side-load lever arm risks are minimal. Note that air cushions only decelerate near stroke end; they do not hold loads on air loss.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X35-40S
- ✓ 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 SIJ63X35-40S FAQ
Yes, the AirTAC SIJ63X35-40S is discontinued. The direct replacement is the SAIJ63X35-40S. It shares the identical ISO 15552 interface, 63 mm bore, 35 mm stroke, 40 mm adjust window, G3/8 port, and mounting dimensions, but features an upgraded two Y-shaped one-way piston seal.
The external stop screw offers a 40 mm adjust window to trim the 35 mm nominal extend stroke down to 0 mm on-site. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X35-40S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X35-40S replacement — usually within 7-8 hours.