This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID40X175, 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 SID40X175
The AirTAC Airtac SID Series Double-Rod Cylinder SID40X175 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 SAID40X175, 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 → SAID40X175
- 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 SID40X175
The AirTAC SID40X175 is a discontinued double-acting, double-rod ISO 15552 cylinder. A rod exits both ends on one piston, meaning both faces use the rod-side area and push and pull force are equal (528 N @0.5 MPa). The direct replacement is the SAID40X175, matching the 40 mm bore, 175 mm stroke, G1/4 port, and mounting interface. The SAI upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life.
This SKU has no -S magnet and cannot take a magnetic switch. A double-rod design prevents rotation and can drive two tools. The cylinder uses a Ø16 mm rod, M12x1.25 thread, and 27 mm cushions. It does not hold loads on air loss; use SAIL or BSAI lock variants for that.
Airtac SID Series Double-Rod Cylinder SID40X175 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID40X175 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID40X175 |
| 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 SAID40X175 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 SAID40X175 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 SID40X175
| 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 SID40X175 Is Used
Twin-Tool Drive
Drives two opposing tools simultaneously from a single piston, ensuring perfectly synchronized operation with equal push and pull force.
Equal-Force Transfer
Transfers workpieces on a conveyor using identical 528 N force in both directions, preventing jerky motions on direction reversal.
Replacing the Airtac SID Series Double-Rod Cylinder SID40X175 with the SAID40X175
Replace the SID40X175 directly with the SAID40X175 (same ISO 15552 mounting interface, bore, and stroke). Size both ways by checking equal force: this 40 mm bore provides 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. If more force is needed, step up to the 50 mm bore (825 N @0.5 MPa); if less is needed, drop to the 32 mm bore (345 N @0.5 MPa). A double rod is right when you need anti-rotation or must drive two tools. Reuse FA, LB, or TC mounts. This non-magnetic SKU cannot take switches. For stroke lengths >=300 mm, verify side-load bearing limits.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID40X175
- ✓ 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 SID40X175 FAQ
Yes, the SID40X175 is discontinued. The direct replacement is the SAID40X175. It shares the same ISO 15552 interface, 40 mm bore, 175 mm stroke, G1/4 air port, and equal-both-ways force.
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. It has a Ø16 mm rod, M12x1.25 thread, 27 mm cushions, and speeds of 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAID40X175
Send us the quantity and destination. We confirm price, stock and lead time on the SAID40X175 replacement — usually within 7-8 hours.