This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID50X900, 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 SID50X900
The AirTAC Airtac SID Series Double-Rod Cylinder SID50X900 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 900mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID50X900, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke900 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAID50X900
- 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 SID50X900
The AirTAC SID50X900 is a double-acting, double-rod ISO 15552 cylinder with a 50 mm bore and 900 mm stroke. Because a rod exits both ends, push and pull force are equal at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. This SID model is discontinued; the direct replacement is the SAID50X900, matching the G1/4 port, M16x1.5 rod thread, and 30 mm adjustable cushion. The SAI upgrade uses a two-piece Y-shaped piston seal for lower start-up pressure and longer life.
This non-magnet SKU cannot accept a sensor. The rear rod can drive a second tool or carry a sensor cam. A plain cylinder drifts on air loss—cushions only decelerate—so use an external rod lock for held loads.
Airtac SID Series Double-Rod Cylinder SID50X900 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID50X900 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID50X900 |
| Bore size | Ø50 mm |
| Stroke | 900 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| 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 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAID50X900 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAID50X900 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 SID50X900
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×900 | 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 SID50X900 Is Used
Dual-Station Transfer
Simultaneously pushes a part onto an outbound conveyor while pulling an empty pallet into the load position, utilizing the equal both-ways force to halve cycle time.
Anti-Rotation Clamping
Secures a workpiece from both ends using the dual rods to prevent torsional twist during machining, ensuring high repeatability without external guides.
Replacing the Airtac SID Series Double-Rod Cylinder SID50X900 with the SAID50X900
Replace the discontinued SID50X900 directly with the SAID50X900, reusing the existing ISO 15552 mounting interface (Basic, FA, LB, TC) without bracket changes. Size both directions by equal force: if 1154 N @0.7 MPa is insufficient, step up to the 63 mm bore (1962 N), or drop to the 40 mm bore (739 N) if lower. Choose a double-rod cylinder when you need anti-rotation stability or must drive two tools from one piston. This SKU lacks the -S magnet, so it cannot mount reed switches; add external sensors if needed. For the 900 mm stroke, use external guides to prevent rod bending and side-load damage. Speed is 30-800 mm/s.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID50X900
- ✓ 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 SID50X900 FAQ
Yes, the SID50X900 is discontinued. The direct replacement is the SAID50X900. It shares the same ISO 15552 interface, 50 mm bore, 900 mm stroke, G1/4 port, and equal both-ways force. The SAI family also adds upgraded piston seals and lock variants like SAIL and BSAI.
Force is equal both ways: 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. The air port is G1/4, the rod thread is M16x1.5, and adjustable cushions are 30 mm at each end. Note that air cushions only decelerate; they do not hold loads on air loss.
Related AirTAC SAI Cylinders
Request a Quote for the SAID50X900
Send us the quantity and destination. We confirm price, stock and lead time on the SAID50X900 replacement — usually within 7-8 hours.