This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID40X75, 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 SID40X75
The AirTAC Airtac SID Series Double-Rod Cylinder SID40X75 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 75mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID40X75, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke75 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAID40X75
- 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 SID40X75
The AirTAC SID40X75 is a double-acting, double-rod ISO 15552 cylinder featuring a 40mm bore and 75mm stroke. Because a rod exits both ends on one piston, both faces use the rod-side area, making push and pull force equal at 528N @0.5MPa, 739N @0.7MPa, and 950N @0.9MPa. This model is discontinued; the direct replacement is the SAID40X75, retaining the G1/4 port, M12x1.25 rod thread, and 27mm adjustable cushions. The SAI upgrade uses a two Y-shaped one-way piston seal for low start-up pressure.
Without a -S suffix, this SKU lacks a magnet and cannot take a sensor. A plain cylinder does not hold loads on air loss; cushions only decelerate near stroke end. For held loads, use an external rod lock or SAIL/BSAI variant.
Airtac SID Series Double-Rod Cylinder SID40X75 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID40X75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID40X75 |
| Bore size | Ø40 mm |
| Stroke | 75 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 SAID40X75 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 SAID40X75 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 SID40X75
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×75 | 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 SID40X75 Is Used
Gauging Station
Equal both-ways force drives a measuring head to check part dimensions without directional thrust variance.
Dual-Tool Transfer
The extending back rod simultaneously pushes a secondary mechanism, timing two operations from one cylinder.
Anti-Rotation Clamp
Double-rod geometry prevents piston twist during clamping, holding alignment for precision machining.
Replacing the Airtac SID Series Double-Rod Cylinder SID40X75 with the SAID40X75
To replace the discontinued SID40X75, swap in the SAID40X75 directly—it matches the ISO 15552 mounting interface, 75mm stroke, and equal-both-ways force. Size both directions by checking neighbouring bores (32mm or 50mm) if you need to adjust the 528N @0.5MPa capacity. A double rod is right when you need anti-rotation stability or must drive two tools from one piston. Reuse FA, LB, or TC mounts. Note that this non-magnetic SKU cannot accept switches; for stroke lengths >=300mm, verify side-load bearing limits.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID40X75
- ✓ 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 SID40X75 FAQ
Yes, the SID40X75 is discontinued. The direct replacement is the SAID40X75, which shares the same ISO 15552 interface, G1/4 port, and 75mm stroke.
Force is equal both ways: 528N @0.5MPa, 739N @0.7MPa, and 950N @0.9MPa. Speed is 30-800mm/s. The 40mm bore uses a G1/4 port, M12x1.25 rod thread, and 27mm adjustable cushions.
Request a Quote for the SAID40X75
Send us the quantity and destination. We confirm price, stock and lead time on the SAID40X75 replacement — usually within 7-8 hours.