This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID63X250S, 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 SID63X250S
The AirTAC Airtac SID Series Double-Rod Cylinder SID63X250S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 250mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID63X250S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAID63X250S
- 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 SID63X250S
The AirTAC SID63X250S is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, yielding equal force in both directions (1402 N at 0.5 MPa). Because both faces use the rod-side area, push and pull forces match exactly. This discontinued model drops directly into existing FA, LB, or TC mounts via the genuine ISO 15552 interface, requiring no mechanical rework.
The direct replacement is the SAID63X250S, retaining the 63 mm bore, 250 mm stroke, M16x1.5 rod thread, and G3/8 port. The SAI upgrade introduces a two-piece Y-shaped piston seal for lower start-up pressure and longer life. The -S suffix denotes a piston magnet for legacy CS1-B/DS1-B sensors.
Airtac SID Series Double-Rod Cylinder SID63X250S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID63X250S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID63X250S |
| Bore size | Ø63 mm |
| Stroke | 250 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 SAID63X250S 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 SAID63X250S 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 SID63X250S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×250 | 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 SID63X250S Is Used
Dual-End Conveyor Transfer
Drives a pusher blade from the rear rod while the front rod simultaneously retracts a diverter, synchronising two conveyor actions with equal 1402 N force.
Anti-Rotation Machining Clamp
The twin-rod architecture prevents piston rotation during high-speed clamping, ensuring the M16x1.5 threaded tool stays precisely aligned on the workpiece.
Replacing the Airtac SID Series Double-Rod Cylinder SID63X250S with the SAID63X250S
To replace the SID63X250S, install the SAID63X250S directly; the ISO 15552 dimensions, 250 mm stroke, G3/8 port, and equal both-ways force are identical. Size both directions by checking the 1402 N @0.5 MPa rating against your load, and verify if neighbouring bores (50 mm or 80 mm) are required for different force margins. A double-rod design is correct when you need anti-rotation stability or must drive two tools from one piston. Reuse existing FA, LB, or TC mounts, and ensure the -S magnet is specified if positioning sensors are needed. For this 250 mm stroke, side-load is minimal, but for any stroke >=300 mm, verify guide alignment to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID63X250S
- ✓ 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 SID63X250S FAQ
Yes, the SID63X250S is discontinued. The direct replacement is the SAID63X250S. It shares the same ISO 15552 mounting interface, 63 mm bore, 250 mm stroke, G3/8 port, and equal both-ways force, but adds an upgraded two-piece Y-shaped piston seal.
The G3/8 port feeds a double-acting double-rod design delivering equal force both ways: 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. The cylinder does not hold loads on air loss; the 30 mm adjustable cushion only decelerates near stroke end. For held loads, use an external rod lock or SAIL/BSAI variant.
Related AirTAC SAI Cylinders
Request a Quote for the SAID63X250S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID63X250S replacement — usually within 7-8 hours.