This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40BX190, 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 SI40BX190
The AirTAC Airtac SI40 Standard Cylinder SI40BX190 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 190mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40BX190, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke190 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40BX190
- 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 SI40BX190
The AirTAC SI40BX190 is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 190mm stroke. Delivering 628N push force at 0.5MPa, it features a SUS304 stainless piston rod for corrosion resistance. The direct successor is the SAI40BX190, matching the G1/4 port, M12x1.25 thread, and 27mm cushions.
This SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure. Without a -S suffix, this SKU cannot take a magnetic switch.
Airtac SI40 Standard Cylinder SI40BX190 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40BX190 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40BX190 |
| Bore size | Ø40 mm |
| Stroke | 190 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 SAI40BX190 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 SAI40BX190 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 SI40BX190
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×190 | 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 SI40BX190 Is Used
Stainless Rod Actuation
Ideal for packaging machinery requiring the SUS304 rod option to resist washdown corrosion while providing 628N push force.
Material Diversion
Handles 190mm stroke diverting gates on light conveyors, utilizing the adjustable 27mm air cushions for smooth end-of-stroke deceleration.
Compact Ejection
Suits small part ejection stations where the 40mm bore fits tight ISO 15552 fixtures and delivers reliable 528N pull force.
Replacing the Airtac SI40 Standard Cylinder SI40BX190 with the SAI40BX190
To replace the SI40BX190, order the SAI40BX190. Verify the ISO 15552 mounting interface, 40mm bore, 190mm stroke, G1/4 port, and SUS304 rod. If sensing is needed, select an -S magnet SKU. Neighbouring bores: SI32 offers 402N [email protected], while SI50 yields 982N. Note that a plain cylinder drifts on air loss; the cushions only decelerate. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40BX190
- ✓ 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 SI40BX190 FAQ
Yes, the SI40BX190 is discontinued. The direct replacement is the SAI40BX190. It shares the identical ISO 15552 mounting interface, 40mm bore, 190mm stroke, force, G1/4 port, and SUS304 rod, fitting existing fixtures perfectly.
The G1/4 port bore delivers 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a theoretical max of 128kgf at 1.0MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40BX190
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40BX190 replacement — usually within 7-8 hours.