This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X200SLB, 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 SI40 Standard Cylinder SI40X200SLB
The AirTAC Airtac SI40 Standard Cylinder SI40X200SLB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 200mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X200SLB, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke200 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X200SLB
- 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 SI40 Standard Cylinder SI40X200SLB
The AirTAC SI40X200SLB is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 200mm stroke, delivering 628N push force at 0.5MPa via a G1/4 port. AirTAC replaced it with the SAI40X200SLB direct upgrade. This current-production model shares the exact ISO 15552 mounting interface, LB foot bracket, M12x1.25 rod thread and output force, fitting existing fixtures perfectly.
The SAI upgrade features a redesigned piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also introduces SAIL, SAIF and BSAI lock variants absent from the legacy line. Your -S magnet works with CS1-B/DS1-B switches, while Viton H seals raise heat resistance to 150C.
Airtac SI40 Standard Cylinder SI40X200SLB Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X200SLB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X200SLB |
| Bore size | Ø40 mm |
| Stroke | 200 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 SAI40X200SLB 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 SAI40X200SLB produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI40 Standard Cylinder SI40X200SLB
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×200 | 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 SI40 Standard Cylinder SI40X200SLB Is Used
Package Diverting
Pushes medium-weight cartons on a packaging line using the 628N thrust and 200mm travel distance.
Pallet Positioning
Aligns pallets or totes at a workstation via the LB foot mount, absorbing side loads with external guides.
Clamp Actuation
Secures workpieces during machining, using the -S magnet and CS1-B sensors to confirm clamp position.
Replacing the Airtac SI40 Standard Cylinder SI40X200SLB with the SAI40X200SLB
To replace the SI40X200SLB, order the SAI40X200SLB. Verify the ISO 15552 interface, 40mm bore, 200mm stroke, G1/4 port, LB foot mounting, and the -S magnet. If you need more force, the 50mm bore yields 982N push at 0.5MPa; if less is required, the 32mm bore provides 402N. For load holding, note that a plain cylinder drifts on air loss as the cushion only decelerates. Use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. At 200mm stroke, side-load is minimal, but always guide the rod to prevent bending. The SAIF variant offers a built-in valve if needed.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X200SLB
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI40 Standard Cylinder SI40X200SLB FAQ
Yes, the SI40X200SLB is discontinued. The direct replacement is the SAI40X200SLB. It shares the identical ISO 15552 mounting interface, 40mm bore, 200mm stroke, G1/4 port, and LB foot mount, fitting existing fixtures without modification.
The 40mm bore uses a G1/4 port. At 0.5MPa it provides 628N push and 528N pull force. At 0.7MPa push is 879N, and at 0.9MPa push is 1130N. The theoretical maximum force is 128kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X200SLB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X200SLB replacement — usually within 7-8 hours.