This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID80X550, 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 SID80X550
The AirTAC Airtac SID Series Double-Rod Cylinder SID80X550 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 550mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID80X550, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke550 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAID80X550
- 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 SID80X550
The AirTAC SID80X550 is a discontinued double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, yielding equal push and pull force of 2268 N at 0.5 MPa, 3175 N at 0.7 MPa, and 4082 N at 0.9 MPa. It features an 80 mm bore, a 25 mm rod, M20x1.5 rod threads, G3/8 air ports, and 36 mm adjustable cushions. The direct replacement is the SAID80X550, matching the interface, bore, stroke, and force.
This SKU lacks a magnet (-S) and cannot accept magnetic switches. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. Note that air cushions only decelerate; use an external rod lock or SAIL/BSAI variant for load holding.
Airtac SID Series Double-Rod Cylinder SID80X550 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID80X550 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID80X550 |
| Bore size | Ø80 mm |
| Stroke | 550 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAID80X550 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
The SAID80X550 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 SID80X550
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×550 | 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 SID80X550 Is Used
Dual-Tool Transfer
Drives two synchronized work operations simultaneously using the front and rear rod ends on a 550 mm transfer line.
Balanced Vertical Lift
Equal both-ways force ensures stable lifting and lowering of 116 kg vertical loads without single-rod pull force drop.
Anti-Rotation Indexing
The twin-rod architecture prevents piston rotation during 550 mm extended machining or clamping tasks.
Replacing the Airtac SID Series Double-Rod Cylinder SID80X550 with the SAID80X550
To replace the discontinued SID80X550, install the direct replacement SAID80X550, reusing the existing ISO 15552 FA, LB, or TC mounts without machining. Because force is equal both ways, size both directions identically; if downgrading to a 63 mm bore yields 1402 N (insufficient), stepping up to a 100 mm bore provides 3681 N. A double-rod design is correct when you need anti-rotation resistance or a rear rod to drive a second tool. This non-magnetic SKU cannot use sensors. For the 550 mm stroke, use external guides to prevent rod bending under side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID80X550
- ✓ 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 SID80X550 FAQ
Yes, the SID80X550 is discontinued. The direct replacement is the SAID80X550, offering the same ISO 15552 interface, 80 mm bore, 550 mm stroke, G3/8 port, and equal both-ways force, but adds an upgraded SAI piston seal.
The SID80X550 provides equal push and pull force of 2268 N at 0.5 MPa, 3175 N at 0.7 MPa, and 4082 N at 0.9 MPa. It uses a G3/8 air port, a 25 mm rod, M20x1.5 threads, and 36 mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAID80X550
Send us the quantity and destination. We confirm price, stock and lead time on the SAID80X550 replacement — usually within 7-8 hours.