This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40BX60, 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 SI40BX60
The AirTAC Airtac SI40 Standard Cylinder SI40BX60 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 SAI40BX60, 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 → SAI40BX60
- 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 SI40BX60
The AirTAC SI40BX60 is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 60 mm stroke. It delivers 628 N push force at 0.5 MPa via a G1/4 port. The direct replacement is the SAI40BX60, which shares the same interface, force, and mounting.
The SAI upgrade features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The -B rod option on this unit uses SUS304 stainless steel for corrosion resistance. Since this SKU lacks a magnet, it cannot take a sensor.
Airtac SI40 Standard Cylinder SI40BX60 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40BX60 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40BX60 |
| 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 SAI40BX60 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 SAI40BX60 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 SI40BX60
| 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 SI40BX60 Is Used
Compact Part Ejection
Uses the 628 N push force at 0.5 MPa to positively eject machined aluminium parts from a fixture, with the SUS304 rod resisting coolant spray.
Flap Folding
Drives a 60 mm stroke to fold cardboard flaps on a packaging line, where the 30-800 mm/s speed range ensures rapid cycle times.
Light Diverting
Actuates a diverter arm for small logistics totes, safely handling loads under the 377 N safe working limit.
Replacing the Airtac SI40 Standard Cylinder SI40BX60 with the SAI40BX60
To replace the SI40BX60, order the SAI40BX60. Confirm the ISO 15552 mounting interface, the 40 mm bore, the 60 mm stroke, and the G1/4 port (PT/G/NPT thread options). Because this specific SKU has no -S magnet, it cannot accept a CS1-B or DS1-B sensor; if position detection is needed, select an SAI40X60S equivalent instead. For sizing, the 32 mm bore offers 402 N push at 0.5 MPa, while the 50 mm bore provides 982 N. Note that a plain cylinder drifts on air loss; for load holding, use an external pilot check valve or explore the SAIL lock or BSAI clamp-lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40BX60
- ✓ 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 SI40BX60 FAQ
Yes, the SI40BX60 is discontinued. The direct replacement is the SAI40BX60. It is dimensionally interchangeable per ISO 15552, retaining the same 40 mm bore, 60 mm stroke, 628 N output force, G1/4 port, and mounting accessories.
This double-acting cylinder features a G1/4 air port and a 16 mm piston rod. The thrust is 628 N push and 528 N pull at 0.5 MPa, 879 N push at 0.7 MPa, 1130 N push at 0.9 MPa, and a theoretical maximum of 128 kgf at 1.0 MPa.
Request a Quote for the SAI40BX60
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40BX60 replacement — usually within 7-8 hours.