This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID40X135, 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 SID40X135
The AirTAC Airtac SID Series Double-Rod Cylinder SID40X135 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 135mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID40X135, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke135 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAID40X135
- 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 SID40X135
The AirTAC SID40X135 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. The direct replacement is the SAID40X135, matching the 40mm bore, 135mm stroke, G1/4 air port, and mounting interface. The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life.
Because this SKU lacks a -S magnet, it cannot accept a magnetic switch. A plain cylinder drifts on air loss; the 27mm adjustable air cushions only decelerate near stroke ends, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SID Series Double-Rod Cylinder SID40X135 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID40X135 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID40X135 |
| Bore size | Ø40 mm |
| Stroke | 135 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 SAID40X135 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 SAID40X135 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 SID40X135
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×135 | 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 SID40X135 Is Used
Transfer Pushers
Equal both-ways thrust drives parts across a conveyor belt on the extend stroke while smoothly retracting the dual tool without force imbalance.
Gripping Jaws
The twin-rod anti-rotation特性 keeps external gripping jaws perfectly aligned during clamping, preventing torsional twist on the workpiece.
Replacing the Airtac SID Series Double-Rod Cylinder SID40X135 with the SAID40X135
Replace the SID40X135 directly with the SAID40X135, reusing the existing ISO 15552 mounting hardware (Basic, FA, LB, TC). Size both directions by verifying the equal 528 N @0.5 MPa force fits your load, or step to neighboring bores (32mm or 50mm) for different thrust. Choose a double-rod cylinder when you need anti-rotation stability or must drive two tools simultaneously. For this 135mm stroke, side-load alignment is generally forgiving, but for any stroke >=300mm ensure correct guide alignment. Select a -S magnet suffix if sensor tracking is required, as this non-magnetic SKU cannot accept switches.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID40X135
- ✓ 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 SID40X135 FAQ
Yes, the SID40X135 is discontinued. The direct replacement is the SAID40X135, offering the same ISO 15552 interface, 40mm bore, 135mm stroke, G1/4 port, and equal both-ways force.
Force is equal both ways at 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. The bore dictates a G1/4 air port, a 16mm rod with an M12x1.25 thread, and 27mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAID40X135
Send us the quantity and destination. We confirm price, stock and lead time on the SAID40X135 replacement — usually within 7-8 hours.