This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID40X150S, 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 SID40X150S
The AirTAC Airtac SID Series Double-Rod Cylinder SID40X150S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 150mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID40X150S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke150 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAID40X150S
- 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 SID40X150S
The AirTAC SID40X150S is a discontinued double-acting, double-rod ISO 15552 cylinder where a rod exits both ends on one piston. This geometry means both faces use the rod-side area, making push and pull force equal at 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. It features a 40mm bore, 16mm rod, M12x1.25 rod thread, G1/4 air port, and 27mm adjustable cushions. As an end-of-life product, its direct replacement is the SAID40X150S, sharing the same interface, force, and mounting.
The SAI replacement upgrades the piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The double-rod design prevents rod rotation and lets the back rod carry a sensor cam or drive a second tool. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B 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 SID40X150S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID40X150S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID40X150S |
| Bore size | Ø40 mm |
| Stroke | 150 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 SAID40X150S 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 SAID40X150S 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 SID40X150S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | 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 SID40X150S Is Used
Synchronized Tool Driving
Drives two opposing tools simultaneously from a single piston, utilizing the equal both-ways force to machine or form parts from both ends with identical 528 N @0.5 MPa thrust.
Anti-Rotation Transfer
Transfers workpieces along a conveyor without rotational drift, using the dual-rod geometry to maintain strict linear orientation through the 150mm travel.
Dual-End Position Feedback
Uses the -S piston magnet with rear-mounted CS1-B/DS1-B switches to confirm stroke end positions on a secondary mechanism while the front rod performs the primary work.
Replacing the Airtac SID Series Double-Rod Cylinder SID40X150S with the SAID40X150S
To replace the discontinued SID40X150S, install the direct replacement SAID40X150S, which matches the ISO 15552 mounting interface, 40mm bore, 150mm stroke, G1/4 port, and equal both-ways force. When sizing, verify both push and pull directions carry the same 528 N @0.5 MPa load; if more force is needed, step up to the 50mm bore. Choose a double-rod cylinder when anti-rotation is required or when the rear rod must drive a second mechanism. Mounting options include Basic, FA, LB, and TC. The -S magnet supports legacy CS1-B/DS1-B sensors. For this 150mm stroke, side-load is minimal, but for strokes >=300mm ensure guide alignment to prevent binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID40X150S
- ✓ 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 SID40X150S FAQ
Yes, the SID40X150S is discontinued. The direct replacement is the SAID40X150S, which shares the same ISO 15552 interface, 40mm bore, 150mm stroke, G1/4 port, and equal both-ways force.
Being a double-rod cylinder, force is equal both ways: 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAID40X150S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID40X150S replacement — usually within 7-8 hours.