This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X250-75, 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 SIJ63X250-75
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X250-75 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 SAIJ63X250-75, 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 → SAIJ63X250-75
- 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 SIJ63X250-75
The AirTAC SIJ63X250-75 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 63 mm bore and 250 mm maximum stroke. An external stop screw lets you trim the extend stroke by up to 75 mm on-site, yielding a usable 175-250 mm extension window. The direct replacement is the SAIJ63X250-75, matching the interface, force, and mounting.
The SAIJ successor retains the adjustable cushion (30 mm) and adds an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life. Note this SKU lacks a magnet (-S) so it cannot accept legacy CS1-B/DS1-B sensors. The stop screw sets end position but is not a lock; for held loads use an external rod lock or SAIL/BSAI variant.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X250-75 Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X250-75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X250-75 |
| 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 SAIJ63X250-75 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 SAIJ63X250-75 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 SIJ63X250-75
| 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 SIJ63X250-75 Is Used
Variable Depth Drilling
Tuning the extend stroke on-site by up to 75 mm allows a 63 mm bore actuator to accommodate multiple material thicknesses on a single machining fixture without swapping cylinders.
Variable Height Pallet Stops
The external stop screw provides field adjustment of the end position for different pallet heights, ensuring precise stopping without re-engineering the ISO 15552 mounting footprint.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X250-75 with the SAIJ63X250-75
To replace the discontinued SIJ63X250-75, order the direct replacement SAIJ63X250-75, which preserves the 75 mm adjust window, G3/8 port, and ISO 15552 mounting (Basic, FA, LB, TC). Choose the 75 mm adjust window if your end-position tuning requires a wide 175-250 mm extend range. Because this SKU has no -S magnet, position sensing is impossible without external rigging. For this 250 mm stroke, verify side-load limits to prevent rod bearing wear. The external stop sets end position only; it is not a lock, so maintain live air or use a pilot-operated check valve for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X250-75
- ✓ 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 SIJ63X250-75 FAQ
Yes, the AirTAC SIJ63X250-75 is discontinued. The direct replacement is the SAIJ63X250-75. It shares the same 63 mm bore, 250 mm nominal stroke, 75 mm adjust window, G3/8 port, and ISO 15552 mounting interface. The SAIJ family also features an upgraded piston seal for longer life.
The external stop screw provides a 75 mm adjustment window, allowing the extend stroke to be shortened from 250 mm down to 175 mm on-site.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X250-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X250-75 replacement — usually within 7-8 hours.