This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X135, 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 SI63X135
The AirTAC Airtac SI63 Standard Cylinder SI63X135 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 135mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X135, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke135 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X135
- 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 SI63X135
The AirTAC SI63X135 is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 135mm stroke. It delivers 1559N push and 1402N pull at 0.5MPa via a G3/8 port. Because this legacy unit lacks a magnet (-S), it cannot accept position sensors.
Order the direct replacement SAI63X135 to keep the exact ISO 15552 mounting interface, M16x1.5 rod thread and force. The SAI uses upgraded dual Y-shaped piston seals for lower start-up pressure, and introduces SAIL lock and BSAI clamp variants.
Airtac SI63 Standard Cylinder SI63X135 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X135 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X135 |
| Bore size | Ø63 mm |
| Stroke | 135 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 SAI63X135 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 SAI63X135 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 SI63X135
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×135 | 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 SI63X135 Is Used
Mid-Tonnage Clamping
Holds workpieces securely in machining fixtures using its 1559N push force at 0.5 MPa.
Package Diversion
Actuates sorting gates and pushers on packaging lines with a brisk 135mm stroke.
Pallet Stops
Controls pallet flow on roller conveyors, absorbing inertia via adjustable cushions.
Replacing the Airtac SI63 Standard Cylinder SI63X135 with the SAI63X135
To replace the SI63X135, specify the SAI63X135 keeping the 135mm stroke and ISO 15552 interface. Confirm the G3/8 port and mounting accessory (LB, FA, TC). Since this is a non-magnet SKU, it cannot hold a switch; add -S for CS1-B/DS1-B sensing. Neighbouring bores: 50mm gives 982N [email protected], 80mm gives 2513N. Air cushions decelerate but do not lock; for load holding use SAIL or a pilot check valve. At 135mm stroke, rod bending is low, but maintain guide alignment to prevent side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X135
- ✓ 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 SI63X135 FAQ
Yes, the SI63X135 is discontinued. The direct replacement is the SAI63X135. It shares the identical ISO 15552 mounting interface, 63mm bore, 135mm stroke, output force and G3/8 port, fitting existing fixtures perfectly.
The G3/8 port feeds a cylinder delivering 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, and a maximum theoretical force of 318kgf at 1.0MPa. It operates at 30-800mm/s with a 20mm rod.
Request a Quote for the SAI63X135
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X135 replacement — usually within 7-8 hours.