This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID200X250, 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 SID200X250
The AirTAC Airtac SID Series Double-Rod Cylinder SID200X250 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 250mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID200X250, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke250 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAID200X250
- 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 SID200X250
The AirTAC SID200X250 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends on one piston, ensuring push and pull force are equal both ways at 15080 N @0.5 MPa, 21110 N @0.7 MPa, and 27141 N @0.9 MPa. This SKU has no -S magnet and cannot take a sensor. It features a 200mm bore, 250mm stroke, 40mm rod, M36x2 thread, 50mm adjustable cushions, G3/4 port, and 30-500 mm/s speed. The SID line is discontinued; the direct replacement is the SAID200X250, matching the ISO 15552 interface, force, and mounting.
The SAID upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life, and adds SAIL and BSAI lock variants the SI line lacked. Because both faces use the rod-side area, a second rod can drive two tools or carry a sensor cam. A plain cylinder drifts on air loss; the cushion only decelerates near stroke end, so use an external rod lock for held loads.
Airtac SID Series Double-Rod Cylinder SID200X250 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID200X250 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID200X250 |
| Bore size | Ø200 mm |
| Stroke | 250 mm |
| Acting type | Double acting |
| Port size | G3/4 |
| Rod thread | M36×2.0 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 50 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAID200X250 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø200mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 15708 N | 15080 N |
| 0.7 MPa | 21991 N | — |
| Max (@1.0 MPa) | 3204 kgf | |
The SAID200X250 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 SID200X250
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | 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 SID200X250 Is Used
Twin-Tool Pressing Station
Drives two opposing forming tools simultaneously from a single piston, utilizing the equal both ways 21110 N @0.7 MPa force for synchronized metalwork.
Anti-Rotation Diverter
Uses the dual-rod architecture to prevent mechanical twist during high-speed part rejection on a 30-500 mm/s line, maintaining precise alignment.
Replacing the Airtac SID Series Double-Rod Cylinder SID200X250 with the SAID200X250
To replace the discontinued SID200X250, install the SAID200X250 directly; it matches the ISO 15552 mounting interface, bore, stroke, G3/4 port, and equal-both-ways force. Size both ways by checking neighbor bores if you need more or less force, remembering the push and pull are identical. A double rod is right when you need anti-rotation, to drive two tools, or to mount a cam on the back. Reuse FA, LB, or TC mounts. This SKU lacks the -S magnet, so it cannot take a sensor. For this 250mm stroke, side-load is minimal, but for stroke >=300mm ensure guide alignment to prevent binding. Never rely on air to hold a load; use an external rod lock or pilot-operated check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID200X250
- ✓ 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 SID200X250 FAQ
Yes, the SID200X250 is discontinued. The direct replacement is the SAID200X250, which shares the same ISO 15552 interface, 200mm bore, 250mm stroke, G3/4 port, and equal both ways force.
Force is equal both ways: 15080 N @0.5 MPa, 21110 N @0.7 MPa, and 27141 N @0.9 MPa. The air port is G3/4, rod thread is M36x2, and it has 50mm adjustable cushions. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAID200X250
Send us the quantity and destination. We confirm price, stock and lead time on the SAID200X250 replacement — usually within 7-8 hours.