This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40BX200SH, 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 SI40BX200SH
The AirTAC Airtac SI40 Standard Cylinder SI40BX200SH 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 SAI40BX200SH, 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 → SAI40BX200SH
- 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 SI40BX200SH
The AirTAC SI40BX200SH is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore, 200mm stroke, G1/4 port, and M12x1.25 rod thread. Delivering 628N push force at 0.5MPa, it features a SUS304 stainless rod and Viton H high-temp seal (0-150C). The direct replacement is the SAI40BX200SH, sharing the same interface, force, and mounting.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The built-in magnet supports CS1-B/DS1-B switches, while the SAI family adds SAIL, SAIF, and BSAI variants.
Airtac SI40 Standard Cylinder SI40BX200SH Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40BX200SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40BX200SH |
| 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 SAI40BX200SH 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 SAI40BX200SH 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 SI40BX200SH
| 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 SI40BX200SH Is Used
Hot End Diverting
Uses the Viton H high-temperature seal and SUS304 rod to push 628N diverters on hot end conveyors without degrading.
Stainless Actuation
Ideal for washdown manufacturing cells where the SUS304 rod resists corrosion and the 200mm stroke moves tooling.
Replacing the Airtac SI40 Standard Cylinder SI40BX200SH with the SAI40BX200SH
To replace this SI40BX200SH with the SAI40BX200SH, verify the ISO 15552 mounting interface, 40mm bore, 200mm stroke, G1/4 port, and magnet. The -B rod is SUS304 stainless and the -H seal is Viton for 0-150C heat. If sizing up or down, neighbouring 32mm and 50mm bores offer 402N and 982N push at 0.5MPa respectively. For this 200mm stroke, guide side-loads to prevent rod bending. A plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40BX200SH
- ✓ 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 SI40BX200SH FAQ
Yes, the SI40BX200SH is discontinued. The direct replacement is the SAI40BX200SH. It is dimensionally interchangeable per ISO 15552, retaining the same 40mm bore, 200mm stroke, G1/4 port, and mounting interface.
The 40mm bore provides 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N at 0.9MPa, and a 128kgf max at 1.0MPa. Operating speed is 30-800mm/s. The G1/4 port and 27mm cushions handle rapid cycles.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40BX200SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40BX200SH replacement — usually within 7-8 hours.