This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X400-40, 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 SIJ63X400-40
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X400-40 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 SAIJ63X400-40, 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 → SAIJ63X400-40
- 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 SIJ63X400-40
The AirTAC SIJ63X400-40 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 40 mm on-site, giving a usable range of 360-400 mm from the 400 mm nominal maximum. The 63 mm bore features a G3/8 port, M16x1.5 rod thread, and 30 mm adjustable air cushions. This stop sets the end position; it is not a load lock.
The direct replacement is the SAIJ63X400-40, matching the interface, bore, stroke, force, and mounting. The SAIJ family upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X400-40 Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X400-40 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X400-40 |
| 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 SAIJ63X400-40 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 SAIJ63X400-40 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 SIJ63X400-40
| 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 SIJ63X400-40 Is Used
Press Fit Tuning
Trimming the extend stroke by up to 40 mm on-site allows operators to dial in the exact insertion depth for bearings without swapping cylinders.
Divertor Adjustment
Adjusting the extend end position lets a single 63 mm bore cylinder accommodate varying package sizes on a sorting line.
Pallet Stop Calibration
The external stop screw sets the precise 360-400 mm protrusion needed to halt pallets, compensating for mechanical wear over time.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X400-40 with the SAIJ63X400-40
To replace the SIJ63X400-40, order the direct replacement SAIJ63X400-40, retaining your FA, LB, or TC ISO 15552 mounts. Size both ways using 0.5 MPa push force: the 50 mm bore yields 982 N, while the 80 mm bore yields 2513 N. This 63 mm bore provides 1559 N. The 40 mm adjust window allows precise end-position tuning without machining. Because this SKU lacks the -S suffix, it cannot accept a magnetic switch; add -S for legacy CS1-B/DS1-B sensor accuracy. For the 400 mm stroke, use external guides to prevent rod bending and manage side loads. A plain cylinder drifts on air loss; use an external rod lock or SAIL/BSAI variant for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X400-40
- ✓ 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 SIJ63X400-40 FAQ
Yes, the SIJ63X400-40 is discontinued. The direct replacement is the SAIJ63X400-40. It shares the same ISO 15552 interface, 63 mm bore, 400 mm stroke, 40 mm adjust window, G3/8 port, and mounting options, but adds an upgraded SAI piston seal.
The external stop screw provides a 40 mm adjust window, shortening the 400 mm extend stroke down to 360 mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X400-40
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X400-40 replacement — usually within 7-8 hours.