This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X400-75S, 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 SIJ63X400-75S
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X400-75S 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 SAIJ63X400-75S, 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 → SAIJ63X400-75S
- 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 SIJ63X400-75S
The AirTAC SIJ63X400-75S is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, now discontinued. Its external stop screw lets you trim the extend stroke by up to 75 mm on-site, giving a usable 325-400 mm window from the 400 mm nominal maximum. The direct replacement is the SAIJ63X400-75S, matching the interface, force, and mounting.
The SAIJ upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. The stop screw sets end position but is not a load lock; use an external rod lock or SAIL/BSAI variant for held loads. This -S model includes a piston magnet for legacy CS1-B/DS1-B sensors.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X400-75S Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X400-75S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X400-75S |
| 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 SAIJ63X400-75S 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 SAIJ63X400-75S 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 SIJ63X400-75S
| 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 SIJ63X400-75S Is Used
Variable Depth Forming
Pressing or forming parts where the extend stop must be tuned on-site between 325 and 400 mm to accommodate different material thicknesses without re-plumbing the G3/8 air lines.
Adjustable Transfer Pusher
Pushing packages of varying widths on a belt where the external stop screw trims the extend stroke by up to 75 mm to hit distinct downstream sorting gates.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X400-75S with the SAIJ63X400-75S
To replace the discontinued SIJ63X400-75S, order the direct replacement SAIJ63X400-75S, which retains the G3/8 port, 75 mm adjust window, and ISO 15552 mounting interfaces (Basic, FA, LB, TC). Choose the 75 mm adjust window when you need on-site extend tuning between 325 and 400 mm. The -S suffix ensures a piston magnet for switch sensing. Because the 400 mm stroke is long, verify side-load limits and use external guides to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X400-75S
- ✓ 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 SIJ63X400-75S FAQ
Yes, the SIJ63X400-75S is discontinued. The direct replacement is the SAIJ63X400-75S. It matches the ISO 15552 interface, 63 mm bore, 400 mm nominal stroke, 75 mm adjust window, G3/8 port, and mounting footprints. The SAIJ upgrade features a 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 75 mm on-site, yielding a usable stroke of 325-400 mm. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X400-75S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X400-75S replacement — usually within 7-8 hours.