This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID50X800, 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 SID50X800
The AirTAC Airtac SID Series Double-Rod Cylinder SID50X800 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 800mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID50X800, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke800 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAID50X800
- 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 SID50X800
The AirTAC SID50X800 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, ensuring push and pull force is equal both ways at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. This 50 mm bore unit features a 20 mm rod, M16x1.5 thread, 30 mm adjustable cushions, and a fixed G1/4 port. The SID50X800 is discontinued and the direct replacement is the SAID50X800, retaining the same interface and force.
Because the second rod occupies the rear chamber, both faces use the rod-side area, delivering equal both-ways force without the larger single-rod push value. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. Without a -S magnet, this SKU cannot take a magnetic switch. Note that air cushions only decelerate; for load holding on air loss, use an external rod lock or SAIL/BSAI variant.
Airtac SID Series Double-Rod Cylinder SID50X800 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID50X800 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID50X800 |
| Bore size | Ø50 mm |
| Stroke | 800 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 SAID50X800 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 SAID50X800 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 SID50X800
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×800 | 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 SID50X800 Is Used
Dual-End Transfer Pusher
Uses the extending back rod to push a workpiece onto a parallel conveyor while the front rod retracts simultaneously, leveraging equal both-ways force for balanced momentum.
Anti-Rotation Spot Welding
The twin-rod architecture prevents piston roll during electrode descent, maintaining precise alignment on 800 mm strokes without external linear bearings.
Symmetric Clamping Fixture
Drives two opposing clamps from a single piston to center a workpiece, ensuring equal holding force in both directions via the G1/4 ported 50 mm bore.
Replacing the Airtac SID Series Double-Rod Cylinder SID50X800 with the SAID50X800
To replace the discontinued SID50X800, install the direct replacement SAID50X800, which matches the ISO 15552 mounting interface, 800 mm stroke, and G1/4 port. When sizing both ways, verify your application needs equal both-ways force; if 825 N @0.5 MPa is insufficient, step up to the 63 mm bore, or drop to 40 mm if lower force is acceptable. A double rod is right when you need anti-rotation stability or need to drive two tools from one piston. Reuse existing FA, LB, or TC mounts. For the 800 mm stroke, add external guides to prevent rod-bending under side-load. This SKU has no -S magnet, so it cannot take a sensor.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID50X800
- ✓ 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 SID50X800 FAQ
Yes, the SID50X800 is discontinued. The direct replacement is the SAID50X800, which shares the identical ISO 15552 mounting interface, 800 mm stroke, G1/4 port, and equal both-ways force.
Force is equal both ways at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. Speed is 30-800 mm/s. The 50 mm bore uses a G1/4 port, a 20 mm rod, and 30 mm adjustable cushions. Air cushions only decelerate; use an external rod lock for load holding.
Related AirTAC SAI Cylinders
Request a Quote for the SAID50X800
Send us the quantity and destination. We confirm price, stock and lead time on the SAID50X800 replacement — usually within 7-8 hours.