This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID50X150S, 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 SID50X150S
The AirTAC Airtac SID Series Double-Rod Cylinder SID50X150S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 150mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID50X150S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke150 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAID50X150S
- 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 SID50X150S
The AirTAC SID50X150S is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, ensuring push and pull force are equal at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. This unit is discontinued; the direct replacement is the SAID50X150S, retaining the 50mm bore, 150mm stroke, G1/4 port, and mounting interface. The SAI upgrade uses a two Y-shaped one-way piston seal for lower start-up pressure and longer life.
With a 20mm rod and M16x1.5 thread, the dual-rod design prevents rotation and allows the rear rod to carry a sensor cam for -S magnet switches. 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 SID50X150S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID50X150S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID50X150S |
| Bore size | Ø50 mm |
| Stroke | 150 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 SAID50X150S 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 SAID50X150S 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 SID50X150S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×150 | 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 SID50X150S Is Used
Anti-Rotation Tool Drive
Drives a machining head where the twin rods exiting both ends prevent rotation and ensure precise, equal-force clamping in both directions.
Dual-End Transfer Pusher
Pushes a workpiece from one conveyor belt to another using both rod ends to actuate separate mechanisms simultaneously with identical force.
Symmetrical Forming Press
Applies equal 1154 N @0.7 MPa pressure from both faces for balanced material forming, using the rear rod to mount a sensor cam for position feedback.
Replacing the Airtac SID Series Double-Rod Cylinder SID50X150S with the SAID50X150S
To replace the discontinued SID50X150S, install the SAID50X150S directly using the existing ISO 15552 mounting hardware (Basic, FA, LB, or TC). Size both directions by the equal force: 825 N @0.5 MPa, or step up to a 63mm bore if higher force is needed. Choose a double-rod cylinder when you need anti-rotation stability or must drive two tools simultaneously. The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B switches. For this 150mm stroke, side-load is minimal, but for strokes >=300mm ensure guide alignment to prevent binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID50X150S
- ✓ 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 SID50X150S FAQ
Yes, the SID50X150S is discontinued. The direct replacement is the SAID50X150S, which shares the same ISO 15552 interface, 50mm bore, 150mm 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. The air port is G1/4, the rod is 20mm with an M16x1.5 thread, and speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAID50X150S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID50X150S replacement — usually within 7-8 hours.