This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X125SH, 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 SI63X125SH
The AirTAC SI63 Standard Cylinder SI63X125SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 125mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X125SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X125SH
- 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 SI63X125SH
The AirTAC SI63X125SH is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 125mm stroke. It delivers 1559N push force at 0.5MPa via a G3/8 port. The direct replacement is the SAI63X125SH, matching the interface, force, and mounting.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. It adds SAIL, SAIF, and BSAI variants the SI lacked.
Airtac SI63 Standard Cylinder SI63X125SH Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X125SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X125SH |
| Bore size | Ø63 mm |
| Stroke | 125 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 SAI63X125SH 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 SAI63X125SH 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 SI63X125SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×125 | 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 SI63X125SH Is Used
Mid-Tonnage Clamping
Holds workpieces securely in machining fixtures, utilizing the 1559N push force at 0.5MPa for rigid positioning.
Package Diversion
Actuates routing gates on packaging lines, where the 125mm stroke provides precise lateral movement at speed.
Pallet Lift Stops
Controls heavy pallet descent via adjustable cushions, though an external rod lock is needed for holding.
Replacing the Airtac SI63 Standard Cylinder SI63X125SH with the SAI63X125SH
To replace the SI63X125SH, order the SAI63X125SH. Confirm the ISO 15552 mounting interface, 125mm stroke, G3/8 port, and magnet. The SAI family adds SAIL, SAIF, and BSAI lock/valve variants. A plain cylinder drifts on air loss; for load holding use SAIL, BSAI, or an external pilot check valve. Neighbouring bores: 50mm offers 982N push at 0.5MPa; 80mm offers 2513N. The 125mm stroke is under the 1500mm max, avoiding rod-bending side-load issues.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X125SH
- ✓ 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 SI63X125SH FAQ
Yes, the SI63X125SH is discontinued. The direct replacement is the SAI63X125SH. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 125mm stroke, output force, G3/8 port, and mounting accessories.
The 63mm bore features a 20mm rod, M16x1.5 thread, 30mm cushion, and 30-800mm/s speed. Force ratings are: 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, and a theoretical max of 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X125SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X125SH replacement — usually within 7-8 hours.