This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID40X140, 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 SID40X140
The AirTAC Airtac SID Series Double-Rod Cylinder SID40X140 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 140mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID40X140, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke140 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAID40X140
- 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 SID40X140
The AirTAC SID40X140 is a discontinued ISO 15552 double-acting double-rod cylinder. A rod exits both ends on one piston, meaning both faces use the rod-side area and push/pull force is equal at 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. The direct replacement is the SAID40X140, retaining the 40 mm bore, 140 mm stroke, G1/4 air port, M12x1.25 rod thread, and 27 mm adjustable cushions. The SAI upgrade uses an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life.
Because the second rod can drive a second tool or carry a sensor cam while resisting rotation, this layout is ideal for compact syncing. This non-magnet SKU cannot accept a sensor. A plain cylinder drifts on air loss—the cushion only decelerates near stroke end, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SID Series Double-Rod Cylinder SID40X140 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID40X140 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID40X140 |
| Bore size | Ø40 mm |
| Stroke | 140 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 SAID40X140 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 SAID40X140 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 SID40X140
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×140 | 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 SID40X140 Is Used
Synchronized Transfer Pusher
Drives two linked conveyor flights simultaneously from one piston, using the equal both-ways force to push and retract parts evenly without requiring external linkages.
Anti-Rotation Clamping Jig
The twin-rod geometry prevents piston twist during high-cycle clamping, ensuring the M12x1.25 threaded rod ends hold the workpiece perfectly square under 739 N @0.7 MPa.
Dual-Station Tooling Driver
One rod face actuates a stamping head while the opposite rod end drives a secondary ejector, using the 27 mm adjustable cushions to decelerate tools smoothly at both stroke ends.
Replacing the Airtac SID Series Double-Rod Cylinder SID40X140 with the SAID40X140
To replace the discontinued SID40X140, specify the SAID40X140; it is a direct swap retaining the ISO 15552 mounting interface, 40 mm bore, 140 mm stroke, and G1/4 port. Size both ways by confirming the equal 528 N @0.5 MPa force fits your load, or step to neighbouring bores (32 mm or 50 mm) if you need a different capacity. Choose a double-rod architecture when you need anti-rotation stability or must drive two tools from one piston. Reuse FA, LB, or TC mounts directly. Because this SKU lacks the -S magnet, it cannot support sensing; add -S if you need switches. For this 140 mm stroke side-load is minimal, but for any stroke >=300 mm ensure guide alignment to prevent binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID40X140
- ✓ 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 SID40X140 FAQ
Yes, the AirTAC SID40X140 is discontinued. The direct replacement is the SAID40X140. It shares the identical ISO 15552 mounting interface, 40 mm bore, 140 mm stroke, G1/4 port, and equal both-ways force, while adding an upgraded Y-shaped piston seal for longer life.
Because it is a double-rod cylinder, force is equal in both directions: 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. It operates at 30-800 mm/s, uses a G1/4 port, and has 27 mm adjustable air cushions at each end.
Related AirTAC SAI Cylinders
Request a Quote for the SAID40X140
Send us the quantity and destination. We confirm price, stock and lead time on the SAID40X140 replacement — usually within 7-8 hours.