This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X400-40S, 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 SIJ63X400-40S
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X400-40S 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 SAIJ63X400-40S, 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 → SAIJ63X400-40S
- 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 SIJ63X400-40S
The AirTAC SIJ63X400-40S is a double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 63 mm bore and 400 mm maximum extend. An external stop screw lets you trim the extend stroke by up to 40 mm on-site, yielding a usable 360-400 mm window. This SIJ model is discontinued; the direct replacement is the SAIJ63X400-40S.
The SAIJ successor retains the exact ISO 15552 mounting interface, bore, and force, but upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. The -S suffix denotes a built-in piston magnet for legacy CS1-B/DS1-B switches. Note that the stop screw sets end position only; it is not a load lock, and a plain cylinder drifts on air loss.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X400-40S Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X400-40S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X400-40S |
| 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 SAIJ63X400-40S 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 SAIJ63X400-40S 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 SIJ63X400-40S
| 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 SIJ63X400-40S Is Used
Variable-depth Forming Press
Adjusts the extend stroke on-site by up to 40 mm to accommodate different material thicknesses in a stamping die without changing the cylinder.
Adjustable Transfer Pusher
Tunes the pusher end position between 360 mm and 400 mm to handle varying package sizes on a 63 mm bore ISO 15552 line.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X400-40S with the SAIJ63X400-40S
To replace the discontinued SIJ63X400-40S, order the direct replacement SAIJ63X400-40S, which matches the 63 mm bore, 400 mm nominal stroke, 40 mm adjust window, G3/8 port, and ISO 15552 mounting. Choose the 40 mm adjust window if your process requires trimming the extend stroke down to 360 mm. Mounting options include Basic, FA, LB, and TC. The -S suffix confirms the piston magnet is present for switch sensing. Because the 400 mm stroke is long, verify side-load conditions and use external guides to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X400-40S
- ✓ 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 SIJ63X400-40S FAQ
Yes, the SIJ63X400-40S is discontinued. The direct replacement is the SAIJ63X400-40S. It shares the same ISO 15552 interface, 63 mm bore, 400 mm stroke, 40 mm adjust window, G3/8 port, and mounting options, but features an upgraded piston seal.
The external stop screw allows you to shorten the extend stroke by up to 40 mm on-site, giving a usable stroke range of 360-400 mm. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X400-40S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X400-40S replacement — usually within 7-8 hours.