This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X250-40, 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 SIJ63X250-40
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X250-40 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 250mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ63X250-40, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ63X250-40
- 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 SIJ63X250-40
The AirTAC SIJ63X250-40 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 63mm bore and 250mm maximum stroke. An external stop screw lets you trim the extend stroke by up to 40mm on-site, giving a usable extend range of 210-250mm. The direct replacement is the SAIJ63X250-40, matching the G3/8 port, M16x1.5 rod thread, and 30mm adjustable cushions. This stop sets the end position but is not a load lock.
The SAIJ successor retains the ISO 15552 mounting interface for direct reuse and adds an upgraded two-piece Y-shaped piston seal for lower start-up pressure. Note this non-magnetic SKU lacks a -S sensor groove, so it cannot accept legacy CS1-B/DS1-B switches.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X250-40 Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X250-40 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X250-40 |
| Bore size | Ø63 mm |
| Stroke | 250 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 SAIJ63X250-40 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 SAIJ63X250-40 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 SIJ63X250-40
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×250 | 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 SIJ63X250-40 Is Used
Variable-depth pressing
Allows operators to dial in exact 210-250mm extend endpoints on-site for pressing bearings without machining custom spacers.
Adjustable reject arms
Tunes the pusher stroke by up to 40mm to accommodate different product widths on a packaging line.
Tunable diverters
Provides field-adjustable reach for sorting diverters where the exact end position must be set during commissioning.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X250-40 with the SAIJ63X250-40
To replace the discontinued SIJ63X250-40, order the direct replacement SAIJ63X250-40, keeping the 250mm nominal stroke and 40mm adjust window (210-250mm usable extend). Reuse existing FA, LB, or TC ISO 15552 mounts. Because this SKU lacks the -S magnet, it cannot support position sensing. For strokes of 300mm or longer, verify your side-load limits to prevent guide wear. Remember the external stop screw only sets the end position; it does not hold loads on air loss—use an external rod lock or SAIL/BSAI variant for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X250-40
- ✓ 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 SIJ63X250-40 FAQ
Yes, the SIJ63X250-40 is discontinued. The direct replacement is the SAIJ63X250-40. It shares the same ISO 15552 interface, 63mm bore, 250mm stroke, 40mm adjust window, G3/8 port, and force ratings.
The external stop screw provides a 40mm adjust window, allowing you to shorten the 250mm extend stroke down to 210mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X250-40
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X250-40 replacement — usually within 7-8 hours.