This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID63X50S, 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 SID Series Double-Rod Cylinder SID63X50S
The AirTAC Airtac SID Series Double-Rod Cylinder SID63X50S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 50mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID63X50S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke50 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAID63X50S
- 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 SID Series Double-Rod Cylinder SID63X50S
The AirTAC SID63X50S is a discontinued double-acting double-rod ISO 15552 cylinder where a rod exits both ends on one piston. Both faces use the rod-side area, meaning push and pull force are equal at 1402 N @0.5 MPa, 1962 N @0.7 MPa and 2523 N @0.9 MPa. The direct replacement is the SAID63X50S, matching the 63mm bore, 50mm stroke, G3/8 port and mounting interface. The SAI upgrade uses an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life.
With a 20mm rod, M16x1.5 thread and 30mm adjustable cushion at each end, the double-rod design prevents rod rotation and lets the back rod carry a sensor cam. The -S suffix denotes a built-in piston magnet for legacy CS1-B/DS1-B switches. A plain cylinder does not hold loads on air loss; the cushion only decelerates near stroke end, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SID Series Double-Rod Cylinder SID63X50S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID63X50S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID63X50S |
| Bore size | Ø63 mm |
| Stroke | 50 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 SAID63X50S 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 SAID63X50S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SID Series Double-Rod Cylinder SID63X50S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×50 | 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 SID Series Double-Rod Cylinder SID63X50S Is Used
Synchronous Tool Driving
Operates two opposing tooling heads simultaneously from a single piston, utilizing the equal both-ways force to ensure perfectly synchronized clamping or forming operations.
Anti-Rotation Indexing
The dual-rod architecture inherently resists mechanical twist, providing stable linear positioning for precision indexing stages that cannot tolerate rod rotation.
Dual-End Sensor Camming
The rear extending rod serves as a dedicated sensor cam surface for legacy CS1-B/DS1-B switches, isolating position detection from the primary work tool on the front rod.
Replacing the Airtac SID Series Double-Rod Cylinder SID63X50S with the SAID63X50S
To replace the discontinued SID63X50S, install the direct replacement SAID63X50S, reusing the exact ISO 15552 mounting interface (Basic, FA, LB, TC, FTC, TCM1, TCM2) and G3/8 port. Size both ways by checking equal force: this 63mm bore delivers 1402 N both directions; step down to a 50mm bore for 825 N or up to an 80mm bore for 2268 N. A double rod is right when you need anti-rotation stability or a back rod to drive a second tool. The -S magnet supports legacy CS1-B/DS1-B sensors. For this 50mm stroke side-load is minimal, but for strokes >=300mm ensure guide alignment to prevent binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID63X50S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SID Series Double-Rod Cylinder SID63X50S FAQ
Yes, the SID63X50S is discontinued. The direct replacement is the SAID63X50S, which shares the same ISO 15552 interface, 63mm bore, 50mm stroke, G3/8 port and mounting hardware. The SAI family also adds SAIL and BSAI lock variants the SI line lacked.
Because it is a double-rod cylinder, force is equal both ways: 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. The fluid port is G3/8, the rod is 20mm with an M16x1.5 thread, speed is 30-800 mm/s, and it features a 30mm adjustable cushion at each end.
Related AirTAC SAI Cylinders
Request a Quote for the SAID63X50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID63X50S replacement — usually within 7-8 hours.