This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X400-75, 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 SIJ63X400-75
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X400-75 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 SAIJ63X400-75, 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 → SAIJ63X400-75
- 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 SIJ63X400-75
The AirTAC SIJ63X400-75 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. An 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 SAIJ63X400-75, matching the ISO 15552 interface, bore, stroke, force, and mountings. The SAIJ family upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. Note this non-magnetic SKU cannot take a switch, and the stop screw sets end position but is not a load lock.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X400-75 Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X400-75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X400-75 |
| 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 SAIJ63X400-75 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 SAIJ63X400-75 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 SIJ63X400-75
| 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 SIJ63X400-75 Is Used
Variable Pitch Indexing
Allows on-site extend stroke tuning up to 75 mm to alter part pitch without swapping cylinders between production runs.
Adjustable Pusher Diverter
Provides a 325-400 mm extend window to deflect varying carton sizes on a packaging line using a single actuator.
Variable Height Pallet Stop
Sets precise end positions for different pallet load heights, trimming the extend stroke by up to 75 mm as needed.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X400-75 with the SAIJ63X400-75
To replace the discontinued SIJ63X400-75, order the direct replacement SAIJ63X400-75, reusing your existing FA, LB, or TC ISO 15552 mounts. Choose the 75 mm adjust window if you need on-site extend tuning between 325 and 400 mm. Because this SKU lacks the -S suffix, it cannot accept a magnetic switch; add external sensing if required. For the 400 mm stroke, use an external guide to prevent rod bending and manage side loads. The stop screw only sets the end position; for load holding on air loss, use an external rod lock or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X400-75
- ✓ 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 SIJ63X400-75 FAQ
Yes, the SIJ63X400-75 is discontinued. The direct replacement is the SAIJ63X400-75, which matches the ISO 15552 interface, 400 mm stroke, 75 mm adjust window, G3/8 port, and mounting hardware. The SAIJ family also features an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life.
The external stop screw provides a 75 mm adjustment window, allowing the extend stroke to be shortened on-site from 400 mm down to 325 mm. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X400-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X400-75 replacement — usually within 7-8 hours.