This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID50X800STC, 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 SID50X800STC
The AirTAC Airtac SID Series Double-Rod Cylinder SID50X800STC 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 SAID50X800STC, 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 → SAID50X800STC
- 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 SID50X800STC
The AirTAC SID50X800STC is a discontinued double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, generating equal push and pull force of 825 N at 0.5 MPa, 1154 N at 0.7 MPa, and 1484 N at 0.9 MPa. It features a 50 mm bore, G1/4 air port, M16x1.5 rod thread, and 30 mm adjustable cushions at each end. As a direct replacement, the SAID50X800STC matches this exact interface, bore, stroke, and force.
Because both faces use the rod-side area, force is identical in both directions, preventing push-pull asymmetry. The TC mounting interface allows genuine ISO 15552 interchange. The SAI upgrade introduces a two-piece Y-shaped piston seal for lower start-up pressure and longer life. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B sensors.
Airtac SID Series Double-Rod Cylinder SID50X800STC Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID50X800STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID50X800STC |
| 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 SAID50X800STC 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 SAID50X800STC 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 SID50X800STC
| 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 SID50X800STC Is Used
Equal-Force Transfer
Drives a conveyor diverter with identical push and pull force, ensuring consistent indexing speed in both directions without asymmetry.
Dual-Tool Machining
Operates two opposing tools simultaneously from a single piston, utilizing the second rod end to actuate a secondary mechanism.
Guided Ejection
Ejects workpieces from a press using the dual rods to resist torsional side-load and prevent binding over the 800 mm extension.
Replacing the Airtac SID Series Double-Rod Cylinder SID50X800STC with the SAID50X800STC
To replace the discontinued SID50X800STC, install the direct replacement SAID50X800STC, which retains the 50 mm bore, 800 mm stroke, G1/4 port, TC mount, and equal both-ways force. When sizing both ways, verify the 825 N at 0.5 MPa (or 1154 N at 0.7 MPa) meets your load, or step to neighbouring bores like 40 mm or 63 mm. A double rod is right when you need equal push-pull force, anti-rotation stability, or a back rod to carry a sensor cam. The TC mount provides a trunnion-style pivot. The -S magnet enables position sensing. For this 800 mm stroke, external guides are recommended to prevent rod bending and manage side loads. A plain cylinder does not hold loads on air loss; the cushion only decelerates near stroke end, so use an external rod lock or SAIL/BSAI variant for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID50X800STC
- ✓ 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 SID50X800STC FAQ
Yes, the SID50X800STC is discontinued. The direct replacement is the SAID50X800STC, which matches the ISO 15552 interface, 50 mm bore, 800 mm stroke, G1/4 port, and TC mounting.
Force is equal both ways: 825 N at 0.5 MPa, 1154 N at 0.7 MPa, and 1484 N at 0.9 MPa. Operating pressure is 0.15-1.0 MPa. Speed ranges from 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAID50X800STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAID50X800STC replacement — usually within 7-8 hours.