This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X70-30, 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 SIJ63X70-30
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X70-30 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 70mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ63X70-30, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke70 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ63X70-30
- 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 SIJ63X70-30
The AirTAC SIJ63X70-30 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 30 mm on-site, giving a usable 40-70 mm extend out of the 70 mm nominal maximum. The stop sets end position; it is not a load lock.
This SKU is replaced by the SAIJ63X70-30, a direct match for the ISO 15552 mounting interface, bore, and force. The SAIJ upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life. This non-magnet model (-S omitted) cannot take a magnetic switch. For load holding, note that air cushions only decelerate; use an external rod lock or SAIL/BSAI variant, as plain cylinders drift on air loss.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X70-30 Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X70-30 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X70-30 |
| Bore size | Ø63 mm |
| Stroke | 70 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 SAIJ63X70-30 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 SAIJ63X70-30 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 SIJ63X70-30
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×70 | 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 SIJ63X70-30 Is Used
Multi-Height Forming Press
A 63 mm bore press trimming the extend stroke by up to 30 mm on-site to accommodate varying material thicknesses without machining new hard stops.
Variable-Length Diverter
An actuator deflecting packages on a line, tuned between 40 and 70 mm to match box widths perfectly using the external stop screw.
Adjustable End-Stop Gate
A routing gate requiring precise end-position tuning in the field, using the 30 mm adjust window to set the exact 40-70 mm extend position.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X70-30 with the SAIJ63X70-30
To replace the discontinued SIJ63X70-30, order the direct replacement SAIJ63X70-30, matching the 63 mm bore, 70 mm nominal stroke, 30 mm adjust window, G3/8 port, and ISO 15552 mounting (Basic, FA, LB, TC). Choose the 30 mm adjust window if your fixture needs field tuning between 40 and 70 mm. This SKU lacks the -S magnet, so it cannot accept legacy CS1-B/DS1-B sensors; confirm sensing needs before ordering. Because the stroke is under 300 mm, side-load rod deflection is minimal.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X70-30
- ✓ 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 SIJ63X70-30 FAQ
Yes, the SIJ63X70-30 is discontinued. The direct replacement is the SAIJ63X70-30. It shares the identical ISO 15552 interface, 63 mm bore, 70 mm nominal stroke, 30 mm adjust window, G3/8 port, and mounting options. The SAIJ family also features an upgraded two Y-shaped one-way piston seal for longer life and lower start-up pressure.
The external stop screw provides a 30 mm adjust window, allowing you to shorten the 70 mm extend stroke down to 40 mm on-site.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X70-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X70-30 replacement — usually within 7-8 hours.