This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40BX130S, 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 SI40BX130S
The AirTAC SI40 Standard Cylinder SI40BX130S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 130mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40BX130S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke130 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40BX130S
- 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 SI40BX130S
The AirTAC SI40BX130S is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore, 130mm stroke, G1/4 port and SUS304 stainless rod. It delivers 628N push force at 0.5MPa. AirTAC replaced it with the SAI40BX130S, a direct sharing the same interface, force and port. The SAI features an upgraded piston seal with two Y-shaped elements for low start-up pressure and long life.
This -B variant uses a SUS304 stainless piston rod for corrosion resistance instead of standard carbon steel. With the -S magnet, it supports legacy CS1-B/DS1-B switches (the SAI uses current AirTAC switches). For load holding, note the cushion only decelerates; use a SAIL lock or external check valve.
Airtac SI40 Standard Cylinder SI40BX130S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40BX130S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40BX130S |
| Bore size | Ø40 mm |
| Stroke | 130 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 SAI40BX130S 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 SAI40BX130S 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 SI40BX130S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×130 | 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 SI40BX130S Is Used
Stainless Rod Clamping
Ideal for packaging lines requiring washdown corrosion resistance, using the SUS304 rod to actuate clamping arms with a safe 377N working load.
Transfer Gate Diversion
Provides reliable 130mm stroke diversion on conveyor belts, moving lightweight packages with a 32kg vertical lift capacity at 0.5 MPa.
Order Sorting Pusher
Deploys precise 628N push force to deflect parcels in distribution hubs, utilizing the G1/4 port for rapid cycling at 30-800 mm/s.
Replacing the Airtac SI40 Standard Cylinder SI40BX130S with the SAI40BX130S
To replace the SI40BX130S, order the SAI40BX130S. It drops directly into existing ISO 15552 fixtures with the same 40mm bore, 130mm stroke, M12x1.25 rod thread, G1/4 port and mounting accessories. Retain the -S magnet for position sensing and the -B SUS304 rod for wet environments. If you need more force, the 50mm bore offers 982N push at 0.5MPa; if less is required, the 32mm bore provides 402N. Because this is a 130mm stroke, check for side-load or rod-bending risks and use guide rails if needed. A plain cylinder drifts on air loss, so for load holding explore the SAIL lock, BSAI clamp-lock or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40BX130S
- ✓ 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 SI40BX130S FAQ
Yes, the SI40BX130S is discontinued. The direct replacement is the SAI40BX130S. It shares the exact ISO 15552 mounting interface, 40mm bore, 130mm stroke, G1/4 port and SUS304 rod, fitting existing fixtures perfectly.
This double-acting cylinder uses a G1/4 air port. It generates 628N push and 528N pull at 0.5 MPa, 879N push at 0.7 MPa, 1130N push at 0.9 MPa, and a maximum theoretical force of 128 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40BX130S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40BX130S replacement — usually within 7-8 hours.