This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40BX195, 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 SI40BX195
The AirTAC Airtac SI40 Standard Cylinder SI40BX195 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 195mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40BX195, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke195 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40BX195
- 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 SI40BX195
The AirTAC SI40BX195 is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 195mm stroke. It delivers 628N push force at 0.5MPa through a G1/4 port. The direct replacement is the SAI40BX195, matching the bore, stroke, force, and ISO 15552 mounting interface exactly.
This specific SKU features a SUS304 stainless steel rod for corrosion resistance but lacks a magnet, so it cannot accept a CS1-B/DS1-B sensor. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure.
Airtac SI40 Standard Cylinder SI40BX195 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40BX195 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40BX195 |
| Bore size | Ø40 mm |
| Stroke | 195 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 SAI40BX195 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 SAI40BX195 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 SI40BX195
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×195 | 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 SI40BX195 Is Used
195mm Transfer Stroke
Drives a 195mm pusher movement on a material handling line, providing 628N of thrust to index lightweight cartons between stations.
Non-Sensed Diverting
Acts as a fixed-endpoint mechanical diverter gate where magnetic sensing is unneeded, relying on the adjustable 27mm air cushions for end damping.
Replacing the Airtac SI40 Standard Cylinder SI40BX195 with the SAI40BX195
To replace the discontinued SI40BX195, order the SAI40BX195. Confirm the ISO 15552 mounting interface, the 40mm bore, the 195mm stroke, the G1/4 port, and your specific mounting accessory. Because this SKU has no -S magnet, it cannot support position sensing; if sensing is required, switch to an SAI40X195S equivalent. The SUS304 (-B) rod material must be specified for corrosion resistance. For load holding, note that a plain cylinder drifts on air loss; use an external pilot check valve or the SAIL/BSAI lock variants. If sizing up or down, neighbouring bores are 32mm (402N push @0.5MPa) and 50mm (982N push @0.5MPa).
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40BX195
- ✓ 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 SI40BX195 FAQ
Yes, the SI40BX195 is discontinued. The direct replacement is the SAI40BX195. It is dimensionally interchangeable per ISO 15552, retaining the same 40mm bore, 195mm stroke, 628N force, G1/4 port, and mounting interface.
The G1/4 port bore delivers a push force of 628N and a pull force of 528N at 0.5MPa. At 0.7MPa the push force is 879N, and at 0.9MPa it is 1130N. The theoretical maximum force is 128kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40BX195
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40BX195 replacement — usually within 7-8 hours.