This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X87, 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 SI63 Standard Cylinder SI63X87
The AirTAC Airtac SI63 Standard Cylinder SI63X87 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 87mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X87, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke87 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X87
- 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 SI63 Standard Cylinder SI63X87
The AirTAC SI63X87 is a discontinued double-acting ISO 15552 profile cylinder with an 87 mm stroke. It delivers 1559 N push force at 0.5 MPa through a G3/8 port. AirTAC replaced this legacy unit with the SAI63X87, a direct replacement matching the exact ISO 15552 mounting interface, bore, stroke, output force and port size.
The SAI upgrade features a revised piston seal using two Y-shaped one-way elements for lower start-up pressure and longer life. This plain SKU lacks a magnet and cannot accept a sensor.
Airtac SI63 Standard Cylinder SI63X87 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X87 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X87 |
| Bore size | Ø63 mm |
| Stroke | 87 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 SAI63X87 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 SAI63X87 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI63 Standard Cylinder SI63X87
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×87 | 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 SI63 Standard Cylinder SI63X87 Is Used
Clamping Mechanisms
Applies 1559 N of push force at 0.5 MPa to secure medium-duty workpieces during machining or assembly operations.
Product Diversion
Executes an 87 mm stroke to push packages or components cleanly off a main conveyor belt into a secondary lane.
Pallet Stops
Acts as a pneumatic stop gate for pallets entering a workstation, absorbing kinetic energy via its adjustable end cushions.
Replacing the Airtac SI63 Standard Cylinder SI63X87 with the SAI63X87
To replace the SI63X87, order the SAI63X87. Confirm the ISO 15552 mounting accessory (LB, FA, CA, TC) and the G3/8 port thread (PT, G or NPT). Because this specific SKU has no -S magnet, it cannot support CS1-B or DS1-B sensors; order a magnet-equipped SAI variant if position sensing is needed. The 63 mm bore yields 1559 N push at 0.5 MPa; stepping down to a 50 mm bore gives 982 N, while an 80 mm bore provides 2513 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external pilot check valve or the SAIL/BSAI lock variant for load holding. The 87 mm stroke is below the 300 mm threshold, so rod-bending side loads are minimal.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X87
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI63 Standard Cylinder SI63X87 FAQ
Yes, the SI63X87 is discontinued. The direct replacement is the AirTAC SAI63X87. It shares the identical ISO 15552 mounting interface, 63 mm bore, 87 mm stroke, G3/8 port and output force, fitting directly into existing fixtures.
The bore uses a G3/8 air port. At 0.5 MPa it provides 1559 N push and 1402 N pull force. This rises to 2182 N push at 0.7 MPa and 2805 N at 0.9 MPa. The theoretical maximum force is 318 kgf at 1.0 MPa.
Request a Quote for the SAI63X87
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X87 replacement — usually within 7-8 hours.