This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X400-30, 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 SIJ63X400-30
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X400-30 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 400mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ63X400-30, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ63X400-30
- 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 SIJ63X400-30
The AirTAC SIJ63X400-30 is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, discontinued and replaced by the SAIJ63X400-30. It uses a G3/8 port and an external stop screw to trim the extend stroke by up to 30mm on-site, yielding a usable 370-400mm stroke. Nominal 400mm is the maximum. The stop sets end position only; it is not a load lock.
The SAIJ direct retains the M16x1.5 rod, 30mm cushions, and 30-800mm/s speed. Upgrades include an SAI piston seal (two Y-shaped one-way elements for low start-up pressure). This SKU lacks a magnet, so it cannot take a switch.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X400-30 Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X400-30 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X400-30 |
| Bore size | Ø63 mm |
| Stroke | 400 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 SAIJ63X400-30 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 SAIJ63X400-30 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 SIJ63X400-30
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×400 | 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 SIJ63X400-30 Is Used
Variable-depth machining stops
Trim the extend stroke by up to 30mm on-site to set precise machining end-positions without swapping cylinders when cut depths vary.
Adjustable transfer diverters
Tune the 400mm extend stroke on packaging lines to accommodate different carton sizes on the fly, ensuring accurate routing.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X400-30 with the SAIJ63X400-30
To replace the discontinued SIJ63X400-30, use the SAIJ63X400-30 direct, reusing your FA, LB, or TC ISO 15552 mounts. The 30mm adjust window lets you tune the extend end-position on-site. This non-magnetic SKU cannot take a sensor; for sensing, select a -S model (legacy CS1-B/DS1-B accuracy). At 400mm stroke, mind side-load and rod-bending—use external guides to prevent premature wear. The stop screw is not a lock; for load-holding on air loss, use an external rod lock or SAIL/BSAI variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X400-30
- ✓ 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 SIJ63X400-30 FAQ
Yes, the SIJ63X400-30 is discontinued. The direct replacement is the SAIJ63X400-30, which matches the ISO 15552 interface, 63mm bore, 400mm stroke, 30mm adjust window, G3/8 port, and mounting. The SAIJ adds an upgraded piston seal.
The external stop screw provides a 30mm adjust window, making the usable extend stroke 370-400mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X400-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X400-30 replacement — usually within 7-8 hours.