This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID40X175S, 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 SID40X175S
The AirTAC Airtac SID Series Double-Rod Cylinder SID40X175S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 175mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID40X175S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke175 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAID40X175S
- 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 SID40X175S
The AirTAC SID40X175S is a discontinued double-acting double-rod ISO 15552 cylinder where a rod exits both ends on one piston, ensuring push and pull force are equal at 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. It features a 40mm bore, G1/4 air port, M12x1.25 rod thread, 27mm adjustable cushions, and a built-in magnet for legacy CS1-B/DS1-B switches. The direct replacement is the SAID40X175S, sharing the same interface, force, and mounting.
Replacing this unit with the SAID family retains the ISO 15552 mounting footprint while adding an upgraded two Y-shaped one-way piston seal for lower start-up pressure and longer life. The double-rod design provides anti-rotation stability and allows the back rod to carry a sensor cam. Note that air cushions only decelerate; use an external rod lock or SAIL/BSAI variant to hold loads without live air.
Airtac SID Series Double-Rod Cylinder SID40X175S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID40X175S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID40X175S |
| Bore size | Ø40 mm |
| Stroke | 175 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 SAID40X175S 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 SAID40X175S 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 SID40X175S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×175 | 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 SID40X175S Is Used
Synchronized Transfer
Drives two parallel conveyor pick-off arms from a single centerline, utilizing the equal both ways force to push and retract parts equally without rotational drift.
External Cam Actuation
Uses the rear extending rod to trigger external mechanical limit cams or secondary mechanisms while the front rod performs the primary work stroke.
Balanced Vertical Lift
Lifts and lowers light platens with a 27 kg vertical capacity at 0.5 MPa, where the symmetrical double-rod layout prevents piston sag and maintains smooth vertical guidance.
Replacing the Airtac SID Series Double-Rod Cylinder SID40X175S with the SAID40X175S
To replace the discontinued SID40X175S, specify the SAID40X175S, which matches the 40mm bore, 175mm stroke, G1/4 port, and ISO 15552 mounting interface. Because force is equal both ways, verify your push and pull requirements against the 528 N @0.5 MPa rating; if higher force is needed, step up to the 50mm bore, or drop to the 32mm bore for lighter loads. Choose a double-rod cylinder when your application demands anti-rotation resistance or requires driving two tools simultaneously. Reuse existing FA, LB, or TC mounts. The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B switches (the SAI replacement uses current AirTAC switches). For stroke lengths of 300mm or greater, carefully verify side-load limits to prevent guide bushing wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID40X175S
- ✓ 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 SID40X175S FAQ
Yes, the AirTAC SID40X175S is discontinued. The direct replacement is the SAID40X175S. It shares the same ISO 15552 mounting interface, 40mm bore, 175mm stroke, G1/4 port, and equal both ways force, but features an upgraded piston seal for longer life.
Because it is 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. The air port is G1/4, the rod thread is M12x1.25, and it includes 27mm adjustable cushions at each end with a speed range of 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAID40X175S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID40X175S replacement — usually within 7-8 hours.