This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40BX160SH, 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 SI40BX160SH
The AirTAC SI40 Standard Cylinder SI40BX160SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 160mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40BX160SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke160 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40BX160SH
- 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 SI40BX160SH
The AirTAC SI40BX160SH is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 160mm stroke. It delivers 628 N push force at 0.5 MPa, features a SUS304 stainless piston rod (-B) for corrosion resistance, a Viton H seal (-H) for 0-150 C high-temp environments, and a G1/4 port. The direct replacement is the SAI40BX160SH, 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 -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL, SAIF, and BSAI lock variants absent in the SI line.
Airtac SI40 Standard Cylinder SI40BX160SH Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40BX160SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40BX160SH |
| Bore size | Ø40 mm |
| Stroke | 160 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 SAI40BX160SH 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 SAI40BX160SH 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 SI40BX160SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×160 | 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 SI40BX160SH Is Used
Stainless Rod Actuation
Ideal for packaging machinery requiring corrosion resistance, using the SUS304 rod and high-temp Viton H seals near heat shrink tunnels.
Mid-Force Diverting
Provides 628 N push at 0.5 MPa for diverting moderate-weight product packages on automated material handling lines.
Replacing the Airtac SI40 Standard Cylinder SI40BX160SH with the SAI40BX160SH
To replace the SI40BX160SH, order the SAI40BX160SH. Verify the ISO 15552 mounting interface, 40mm bore, 160mm stroke, G1/4 port, and the -S magnet for position sensing. The -B rod and -H Viton seal must be specified on the new unit. If sizing up, the 50mm bore offers 982 N push at 0.5 MPa; if sizing down, the 32mm bore yields 402 N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant to hold loads. At 160mm stroke, rod bending is low, but ensure guide alignment to prevent side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40BX160SH
- ✓ 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 SI40BX160SH FAQ
Yes, the SI40BX160SH is discontinued. The direct replacement is the SAI40BX160SH. It is dimensionally interchangeable per ISO 15552, retaining the same 40mm bore, 160mm stroke, 628 N force, G1/4 port, and mounting fixtures.
The G1/4 port bore delivers a push force of 628 N and pull of 528 N at 0.5 MPa. At 0.7 MPa push is 879 N, at 0.9 MPa it is 1130 N, with a theoretical max of 128 kgf at 1.0 MPa. It operates at 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40BX160SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40BX160SH replacement — usually within 7-8 hours.