This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40BX60S, 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 SI40BX60S
The AirTAC Airtac SI40 Standard Cylinder SI40BX60S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 60mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40BX60S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke60 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40BX60S
- 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 SI40BX60S
The AirTAC SI40BX60S is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 60mm stroke. Featuring a SUS304 stainless piston rod, it delivers 628N push force at 0.5MPa via a G1/4 port. The direct replacement is the SAI40BX60S, matching the interface, bore, stroke, force, port and mounting exactly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL, SAIF and BSAI lock variants the SI lacked. Your -S magnet works with legacy CS1-B/DS1-B switches.
Airtac SI40 Standard Cylinder SI40BX60S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40BX60S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40BX60S |
| Bore size | Ø40 mm |
| Stroke | 60 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 SAI40BX60S 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 SAI40BX60S 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 SI40BX60S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×60 | 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 SI40BX60S Is Used
Stainless Rod Clamping
Ideal for mid-force clamping tasks where the SUS304 rod resists moisture, providing 628N push force at 0.5MPa for secure part holding.
Short Stroke Diverting
The 60mm stroke offers rapid actuation for diverting small packages on a line, operating efficiently at 30-800mm/s.
Replacing the Airtac SI40 Standard Cylinder SI40BX60S with the SAI40BX60S
To replace this SI40BX60S, order the SAI40BX60S. It is dimensionally interchangeable per the ISO 15552 mounting interface, keeping the 40mm bore, 60mm stroke, G1/4 port, M12x1.25 thread and SUS304 rod. If sizing alternatives, a 32mm bore yields 402N push at 0.5MPa, while a 50mm bore yields 982N. A plain cylinder drifts on air loss as the cushion only decelerates; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. Retain the -S magnet for current AirTAC switches.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40BX60S
- ✓ 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 SI40BX60S FAQ
Yes, the SI40BX60S is discontinued. The direct replacement is the SAI40BX60S. It shares the exact ISO 15552 mounting interface, 40mm bore, 60mm stroke, output force, G1/4 port and mounting accessories, fitting existing fixtures perfectly.
This double-acting cylinder has a G1/4 port. It generates 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a theoretical maximum of 128kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40BX60S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40BX60S replacement — usually within 7-8 hours.