This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID40X75S, 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 SID40X75S
The AirTAC Airtac SID Series Double-Rod Cylinder SID40X75S 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 SAID40X75S, 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 → SAID40X75S
- 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 SID40X75S
The AirTAC SID40X75S is a 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, and 950 N at 0.9 MPa. This 40 mm bore model features a 16 mm rod, M12x1.25 thread, 27 mm cushions, G1/4 port, and a 75 mm stroke. The SID line is discontinued, but the SAID40X75S is a direct replacement retaining the exact mounting interface and bore.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and longevity. A double-rod design prevents rod rotation and lets the rear rod carry a sensor cam. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches.
Airtac SID Series Double-Rod Cylinder SID40X75S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID40X75S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID40X75S |
| 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 SAID40X75S 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 SAID40X75S 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 SID40X75S
| 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 SID40X75S Is Used
Synchronized Tool Driving
Drives two separate operations from one piston, using both extending rods to actuate opposing forming tools simultaneously with equal 528 N force.
Anti-Rotation Gripper
The dual-rod geometry prevents mechanical rotation during the 75 mm travel, securely positioning a parts gripper that cannot twist under offset loads.
External Cam Tracking
Uses the rear protruding rod to carry a sensor cam, allowing external position confirmation while the front rod performs the primary work stroke.
Replacing the Airtac SID Series Double-Rod Cylinder SID40X75S with the SAID40X75S
To replace the discontinued SID40X75S, specify the SAID40X75S, which matches the 75 mm stroke, 40 mm bore, G1/4 port, and ISO 15552 dimensions. Because force is equal both ways, you size both directions identically; if 528 N at 0.5 MPa is insufficient, step up to the 50 mm bore. Choose a double-rod cylinder when you need anti-rotation stability or must drive two tools simultaneously. Reuse FA, LB, or TC mounts directly. The -S suffix denotes a piston magnet for legacy CS1-B/DS1-B switches. For this 75 mm stroke, side-load is minimal, but for strokes of 300 mm or more, ensure guide alignment to prevent binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID40X75S
- ✓ 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 SID40X75S FAQ
Yes, the SID40X75S is discontinued. The direct replacement is the SAID40X75S. It shares the same ISO 15552 mounting interface, 40 mm bore, 75 mm stroke, G1/4 port, and equal both ways force, but features an upgraded piston seal.
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, uses a G1/4 port, and has 27 mm adjustable cushions. Note that air cushions only decelerate; for load holding without live air, use an external rod lock or SAIL/BSAI variant.
Related AirTAC SAI Cylinders
Request a Quote for the SAID40X75S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID40X75S replacement — usually within 7-8 hours.