This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID40X180S, 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 SID40X180S
The AirTAC Airtac SID Series Double-Rod Cylinder SID40X180S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 180mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID40X180S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke180 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAID40X180S
- 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 SID40X180S
The AirTAC SID40X180S is a discontinued double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, yielding equal push and pull force of 528 N at 0.5 MPa (739 N at 0.7 MPa). Because both faces use the rod-side area, the G1/4 ported, Ø16 mm rod design provides precise anti-rotation control and allows the back rod to carry a sensor cam.
This end-of-life model drops in directly with the SAID40X180S, which retains the exact 180 mm stroke, M12x1.25 thread, and 27 mm adjustable cushion. The SAI replacement features an upgraded two Y-shaped one-way piston seal for lower start-up pressure.
Airtac SID Series Double-Rod Cylinder SID40X180S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID40X180S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID40X180S |
| Bore size | Ø40 mm |
| Stroke | 180 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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, 27 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAID40X180S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
The SAID40X180S 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 SID40X180S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×180 | 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 SID40X180S Is Used
Dual-Tool Machining Station
Drives two opposing tools simultaneously from a single piston, utilizing the equal push and pull force to maintain balanced cutting pressure on both ends.
Transfer Pusher Assembly
Uses the rear rod as a mechanical stop or sensor cam while the front rod pushes parts down the line, ensuring precise 180 mm indexing without rotation.
Replacing the Airtac SID Series Double-Rod Cylinder SID40X180S with the SAID40X180S
To replace the SID40X180S, install the SAID40X180S directly; it matches the ISO 15552 interface, bore, stroke, and G1/4 port without altering mounting plates. Size both directions using the equal 528 N force at 0.5 MPa; if more lift is needed, step up to the 50 mm bore. Choose a double-rod cylinder when you need anti-rotation stability or dual-tool driving. Reuse FA, LB, or TC mounts, and specify the -S magnet for CS1-B/DS1-B sensors. For this 180 mm stroke, side-load is minimal, but for strokes >=300 mm ensure guide alignment. A plain cylinder drifts on air loss; for held loads use SAIL/BSAI or an external rod lock.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID40X180S
- ✓ 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 SID40X180S FAQ
Yes, the SID40X180S is discontinued. The direct replacement is the SAID40X180S, sharing the same ISO 15552 mounting, 40 mm bore, 180 mm stroke, G1/4 port, and equal force. The SAI upgrade adds a two Y-shaped one-way piston seal for longer life.
Force is equal both ways: 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa. It operates at 30-800 mm/s, has a 27 mm adjustable cushion at each end, and uses a G1/4 port. It does not hold loads without live air.
Related AirTAC SAI Cylinders
Request a Quote for the SAID40X180S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID40X180S replacement — usually within 7-8 hours.